{
 "agents": {
  "Android Browser": "android", 
  "Baidu Browser": "baidu", 
  "Blackberry Browser": "bb", 
  "Chrome": "chrome", 
  "Chrome for Android": "and_chr", 
  "Edge": "edge", 
  "Firefox": "firefox", 
  "Firefox for Android": "and_ff", 
  "IE": "ie", 
  "IE Mobile": "ie_mob", 
  "Opera": "opera", 
  "Opera Mini": "op_mini", 
  "Opera Mobile": "op_mob", 
  "QQ Browser": "and_qq", 
  "Safari": "safari", 
  "Samsung Internet": "samsung", 
  "UC Browser for Android": "and_uc", 
  "iOS Safari": "ios_saf"
 }, 
 "data": {
  "aac": {
   "notes": "Support refers to this format's use in the `audio` element, not other conditions.", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 12", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "a 22", 
    "Firefox for Android": "a 60", 
    "IE": "y 9", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "http://www.digitalpreservation.gov/formats/fdd/fdd000114.shtml"
  }, 
  "abortcontroller": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 66", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 57", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.3"
   }, 
   "url": "https://dom.spec.whatwg.org/#abortsignal"
  }, 
  "accelerometer": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 67", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/accelerometer/"
  }, 
  "addeventlistener": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://dom.spec.whatwg.org/#dom-eventtarget-addeventlistener"
  }, 
  "ambient-light": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "a 14", 
    "Firefox": "n 63", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/ambient-light/"
  }, 
  "apng": {
   "notes": "Where support for APNG is missing, only the first frame is displayed", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 59", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 3", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 46", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 8", 
    "Samsung Internet": "y 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 8"
   }, 
   "url": "https://wiki.mozilla.org/APNG_Specification"
  }, 
  "array-includes": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 47", 
    "Chrome for Android": "y 67", 
    "Edge": "y 14", 
    "Firefox": "y 43", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 34", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://tc39.github.io/ecma262/#sec-array.prototype.includes"
  }, 
  "arrow-functions": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 45", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 22", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 32", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/6.0/#sec-arrow-function-definitions"
  }, 
  "asmjs": {
   "notes": "", 
   "support": {
    "Android Browser": "a 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "a 28", 
    "Chrome for Android": "a 67", 
    "Edge": "y 13", 
    "Firefox": "y 22", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "a 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "a 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "http://asmjs.org/spec/latest/"
  }, 
  "async-functions": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 55", 
    "Chrome for Android": "y 67", 
    "Edge": "y 15", 
    "Firefox": "y 52", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 42", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://tc39.github.io/ecmascript-asyncawait/"
  }, 
  "atob-btoa": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.6", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/webappapis.html#atob"
  }, 
  "audio": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 20", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/embedded-content.html#the-audio-element"
  }, 
  "audio-api": {
   "notes": "Not all browsers with support for the Audio API also support media streams (e.g. microphone input). See the [getUserMedia/Streams API](/#feat=stream) data for support for that feature.\r\n\r\nFirefox versions < 25 support an alternative, deprecated audio API.\r\n\r\nChrome support [went through some changes](http://updates.html5rocks.com/2014/07/Web-Audio-Changes-in-m36) as of version 36.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 34", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 25", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 22", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/webaudio/"
  }, 
  "audiotracks": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "y 12", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist-and-videotracklist-objects"
  }, 
  "autofocus": {
   "notes": "While not supported in iOS Safari, it does work in iOS WebViews.", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 5", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#autofocusing-a-form-control:-the-autofocus-attribute"
  }, 
  "auxclick": {
   "notes": "With introduction of this feature there will be no longer click event fired for non-primary buttons", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 55", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 53", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 42", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://w3c.github.io/uievents/#event-type-auxclick"
  }, 
  "av1": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 69", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://aomedia.googlesource.com/av1-spec/"
  }, 
  "background-attachment": {
   "notes": "Most mobile devices have a delay in updating the background position after scrolling a page with `fixed` backgrounds.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 25", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "a 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "a 5.0"
   }, 
   "url": "https://www.w3.org/TR/css3-background/#the-background-attachment"
  }, 
  "background-img-opts": {
   "notes": "Firefox, Chrome and Safari support the unofficial `-webkit-background-clip: text` (only with prefix)", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 15", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.5", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://www.w3.org/TR/css3-background/#backgrounds"
  }, 
  "background-position-x-y": {
   "notes": "A workaround for the lack of support in Firefox 31 - Firefox 48 is to use [CSS variables](https://developer.mozilla.org/en-US/docs/Web/CSS/Using_CSS_variables). See [this Stack Overflow answer](https://stackoverflow.com/a/29282573/94197) for an example.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 49", 
    "Firefox for Android": "y 60", 
    "IE": "y 5.5", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://drafts.csswg.org/css-backgrounds-4/#background-position-longhands"
  }, 
  "background-repeat-round-space": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 32", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 49", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 19", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://www.w3.org/TR/css3-background/#the-background-repeat"
  }, 
  "background-sync": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 49", 
    "Chrome for Android": "y 67", 
    "Edge": "n 17", 
    "Firefox": "n 61", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 36", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://wicg.github.io/BackgroundSync/spec/"
  }, 
  "battery-status": {
   "notes": "Firefox 52+ [removed access to this API due to privacy concerns.](https://bugzilla.mozilla.org/show_bug.cgi?id=1313580)", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 38", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 25", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/battery-status/"
  }, 
  "beacon": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 39", 
    "Chrome for Android": "y 67", 
    "Edge": "y 14", 
    "Firefox": "y 31", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 26", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 11.3"
   }, 
   "url": "https://www.w3.org/TR/beacon/"
  }, 
  "beforeafterprint": {
   "notes": "Due to its wider support, consider using `window.matchMedia('print')` where possible.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "u 10", 
    "Chrome": "y 63", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 6", 
    "Firefox for Android": "y 60", 
    "IE": "y 6", 
    "IE Mobile": "u 11", 
    "Opera": "y 50", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "u 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/html5/webappapis.html#printing"
  }, 
  "blobbuilder": {
   "notes": "Partial support refers to only supporting the now deprecated BlobBuilder to create blobs.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 20", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 13", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 12.1", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://www.w3.org/TR/FileAPI/#constructorBlob"
  }, 
  "bloburls": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 23", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://www.w3.org/TR/FileAPI/#url"
  }, 
  "border-image": {
   "notes": "Note that both the `border-style` and `border-width` must be specified (not set to `none` or 0) for border-images to work.", 
   "support": {
    "Android Browser": "a 4.4", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "a 15", 
    "Chrome for Android": "a 67", 
    "Edge": "y 12", 
    "Firefox": "y 50", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "a 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "y 9.3"
   }, 
   "url": "https://www.w3.org/TR/css3-background/#border-images"
  }, 
  "border-radius": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.2", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 5", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://www.w3.org/TR/css3-background/#the-border-radius"
  }, 
  "broadcastchannel": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 54", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 38", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 41", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 7.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/comms.html#broadcasting-to-other-browsing-contexts"
  }, 
  "brotli": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 50", 
    "Chrome for Android": "y 67", 
    "Edge": "y 15", 
    "Firefox": "y 44", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 38", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://tools.ietf.org/html/rfc7932"
  }, 
  "calc": {
   "notes": "Support can be somewhat emulated in older versions of IE using the non-standard `expression()` syntax.\r\n\r\nDue to the way browsers handle [sub-pixel rounding](http://ejohn.org/blog/sub-pixel-problems-in-css/) differently, layouts using `calc()` expressions may have unexpected results.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 26", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 16", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://www.w3.org/TR/css3-values/#calc"
  }, 
  "canvas": {
   "notes": "For screen readers, IE, Chrome & Firefox support the [accessible canvas element sub-DOM](http://www.paciellogroup.com/blog/2012/06/html5-canvas-accessibility-in-firefox-13/).\r\nFirefox & Chrome also support the drawfocus ring.", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.6", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/scripting.html#the-canvas-element"
  }, 
  "canvas-blending": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 30", 
    "Chrome for Android": "y 67", 
    "Edge": "y 13", 
    "Firefox": "y 20", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 17", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://www.w3.org/TR/compositing-1/#blending"
  }, 
  "canvas-text": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/scripting.html#drawing-text-to-the-bitmap"
  }, 
  "ch-unit": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 27", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "a 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://www.w3.org/TR/css3-values/#ch"
  }, 
  "chacha20-poly1305": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 33", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 47", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 36", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://tools.ietf.org/html/rfc7905"
  }, 
  "channel-messaging": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 41", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.6", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/comms.html#channel-messaging"
  }, 
  "childnode-remove": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 24", 
    "Chrome for Android": "y 67", 
    "Edge": "y 13", 
    "Firefox": "y 23", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://dom.spec.whatwg.org/#dom-childnode-remove"
  }, 
  "classlist": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 28", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 26", 
    "Firefox for Android": "y 60", 
    "IE": "a 10", 
    "IE Mobile": "a 10", 
    "Opera": "y 15", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://dom.spec.whatwg.org/#dom-element-classlist"
  }, 
  "client-hints-dpr-width-viewport": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 46", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 33", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://tools.ietf.org/html/draft-grigorik-http-client-hints"
  }, 
  "clipboard": {
   "notes": "Internet Explorer will display a security prompt for access to the OS clipboard.\r\n\r\nChrome 42+, Opera 29+ and Firefox 41+ support clipboard reading/writing only when part of a user action (click, keydown, etc).\r\n\r\nFirefox 40- users [can enable support](https://developer.mozilla.org/en-US/docs/Midas/Security_preferences) with a security preference setting.", 
   "support": {
    "Android Browser": "a 4.4", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 10", 
    "Chrome": "a 13", 
    "Chrome for Android": "a 67", 
    "Edge": "a 12", 
    "Firefox": "a 22", 
    "Firefox for Android": "a 60", 
    "IE": "a 5.5", 
    "IE Mobile": "n 11", 
    "Opera": "a 12.1", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "a 4", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "a 5.0"
   }, 
   "url": "https://www.w3.org/TR/clipboard-apis/"
  }, 
  "comparedocumentposition": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 30", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 17", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://dom.spec.whatwg.org/#dom-node-comparedocumentposition"
  }, 
  "console-basic": {
   "notes": "The basic functions that this information refers to include `console.log`, `console.info`, `console.warn`, `console.error`.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "n 11", 
    "Opera": "y 11", 
    "Opera Mini": "y all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://console.spec.whatwg.org/"
  }, 
  "console-time": {
   "notes": "`console.time()` starts a timer you can use to track how long an operation takes. You give each timer a unique name, and may have up to 10,000 timers running on a given page. When you call `console.timeEnd()` with the same name, the browser will output the time, in milliseconds, that elapsed since the timer was started. These functions are not always available in `workers`. For example, in Firefox, they are available from version `38`. More on using the `console` on mobile devices, see [here](https://caniuse.com/#feat=console-basic). ", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 10", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 11.1", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://console.spec.whatwg.org/#time"
  }, 
  "const": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 49", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 36", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 36", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/6.0/#sec-let-and-const-declarations"
  }, 
  "constraint-validation": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 10", 
    "Chrome": "y 40", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "y 51", 
    "Firefox for Android": "y 60", 
    "IE": "a 10", 
    "IE Mobile": "a 10", 
    "Opera": "y 27", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://html.spec.whatwg.org/dev/form-control-infrastructure.html#the-constraint-validation-api"
  }, 
  "contenteditable": {
   "notes": "This support only refers to very basic editing capability, implementations vary significantly on how certain elements can be edited.", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 5.5", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/interaction.html#contenteditable"
  }, 
  "contentsecuritypolicy": {
   "notes": "The standard HTTP header is `Content-Security-Policy` which is used unless otherwise noted.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 14", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "a 10", 
    "IE Mobile": "a 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://www.w3.org/TR/2012/CR-CSP-20121115/"
  }, 
  "contentsecuritypolicy2": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 40", 
    "Chrome for Android": "y 67", 
    "Edge": "y 15", 
    "Firefox": "a 31", 
    "Firefox for Android": "a 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 27", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.w3.org/TR/CSP2/"
  }, 
  "cors": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 13", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 12", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://fetch.spec.whatwg.org/#http-cors-protocol"
  }, 
  "createimagebitmap": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 59", 
    "Chrome for Android": "y 67", 
    "Edge": "n 17", 
    "Firefox": "y 42", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 46", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n 11.1", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 11.3"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#dom-createimagebitmap"
  }, 
  "credential-management": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 51", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 45", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 7.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/credential-management-1/"
  }, 
  "cryptography": {
   "notes": "Many browsers support the `[crypto.getRandomValues()](#feat=getrandomvalues)` method, but not actual cryptography functionality under `crypto.subtle`. \r\n\r\nFirefox also has support for [unofficial features](https://developer.mozilla.org/en-US/docs/JavaScript_crypto). \r\n\r\nIn Chrome the API is only usable over secure connections. ([corresponding bug](https://code.google.com/p/chromium/issues/detail?id=373032))", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 37", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 34", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 24", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://www.w3.org/TR/WebCryptoAPI/"
  }, 
  "css-all": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 37", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 27", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 24", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.3"
   }, 
   "url": "https://www.w3.org/TR/css-cascade-3/#all-shorthand"
  }, 
  "css-animation": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 43", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 16", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 30", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.w3.org/TR/css3-animations/"
  }, 
  "css-appearance": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "a 12", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "a 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.csswg.org/css-ui-4/#appearance-switching"
  }, 
  "css-apply-rule": {
   "notes": "See also support for [CSS Variables](#feat=css-variables)", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://tabatkins.github.io/specs/css-apply-rule/"
  }, 
  "css-at-counter-style": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "a 33", 
    "Firefox for Android": "a 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.csswg.org/css-counter-styles/"
  }, 
  "css-backdrop-filter": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "y 17", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProperty"
  }, 
  "css-background-offsets": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 25", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 13", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://www.w3.org/TR/css3-background/#background-position"
  }, 
  "css-backgroundblendmode": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 47", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 30", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 34", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "a 7.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "a 8"
   }, 
   "url": "https://www.w3.org/TR/compositing-1/#propdef-background-blend-mode"
  }, 
  "css-boxdecorationbreak": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "y 32", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "a all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css3-break/#break-decoration"
  }, 
  "css-boxshadow": {
   "notes": "Can be partially emulated in older IE versions using the non-standard \"shadow\" filter.", 
   "support": {
    "Android Browser": "y 4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 10", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://www.w3.org/TR/css3-background/#box-shadow"
  }, 
  "css-canvas": {
   "notes": "A similar effect can be achieved in Firefox 4+ using the -moz-element() background property", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 51", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "http://webkit.org/blog/176/css-canvas-drawing/"
  }, 
  "css-caret-color": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 57", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 53", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 44", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "y 7.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-ui-3/#caret-color"
  }, 
  "css-case-insensitive": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 49", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 47", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 36", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://drafts.csswg.org/selectors-4/#attribute-case"
  }, 
  "css-clip-path": {
   "notes": "Support refers to the `clip-path` CSS property on HTML elements specifically. Support for `clip-path` in SVG is supported in all browsers with [basic SVG](#feat=svg) support.", 
   "support": {
    "Android Browser": "a 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "a 55", 
    "Chrome for Android": "a 67", 
    "Edge": "n 18", 
    "Firefox": "y 54", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "a 42", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-masking-1/#the-clip-path"
  }, 
  "css-color-adjust": {
   "notes": "", 
   "support": {
    "Android Browser": "u 67", 
    "Baidu Browser": "u 7.12", 
    "Blackberry Browser": "u 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "u 67", 
    "Edge": "n 17", 
    "Firefox": "y 48", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "u 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "u 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "u 7.2", 
    "UC Browser for Android": "u 11.8", 
    "iOS Safari": "u 12"
   }, 
   "url": "https://drafts.csswg.org/css-color-4/#color-adjust"
  }, 
  "css-conic-gradients": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 69", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-images-4/#conic-gradients"
  }, 
  "css-containment": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 52", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 40", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-contain-1/#contain-property"
  }, 
  "css-counters": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 8", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/CSS21/generate.html#counters"
  }, 
  "css-crisp-edges": {
   "notes": "Note that prefixes apply to the value (e.g. `-moz-crisp-edges`), not the `image-rendering` property.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 41", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 28", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://drafts.csswg.org/css-images-3/#valdef-image-rendering-crisp-edges"
  }, 
  "css-cross-fade": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://drafts.csswg.org/css-images-3/#cross-fade-function"
  }, 
  "css-default-pseudo": {
   "notes": "Whether `<option selected>` matches `:default` (per the spec) was not tested since `<select>`s and `<option>`s are generally not styleable, which makes it hard to formulate a test for this.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "a 10", 
    "Chrome": "y 51", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 38", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://drafts.csswg.org/selectors-4/#the-default-pseudo"
  }, 
  "css-descendant-gtgt": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 68", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.csswg.org/selectors-4/#descendant-combinators"
  }, 
  "css-deviceadaptation": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-device-adapt/"
  }, 
  "css-dir-pseudo": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "y 49", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/selectors4/#the-dir-pseudo"
  }, 
  "css-display-contents": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 65", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 37", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 52", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.3"
   }, 
   "url": "https://drafts.csswg.org/css-display/"
  }, 
  "css-element-function": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css4-images/#element-notation"
  }, 
  "css-exclusions": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css3-exclusions/"
  }, 
  "css-featurequeries": {
   "notes": "See also the [CSS.supports() DOM API](#feat=css-supports-api)", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 28", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 22", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 12.1", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.w3.org/TR/css3-conditional/#at-supports"
  }, 
  "css-filter-function": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.w3.org/TR/filter-effects/#FilterCSSImageValue"
  }, 
  "css-filters": {
   "notes": "Note that this property is significantly different from and incompatible with Microsoft's [older \"filter\" property](http://msdn.microsoft.com/en-us/library/ie/ms530752%28v=vs.85%29.aspx).", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 53", 
    "Chrome for Android": "y 67", 
    "Edge": "a 13", 
    "Firefox": "y 35", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 40", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.3"
   }, 
   "url": "https://www.w3.org/TR/filter-effects-1/"
  }, 
  "css-first-letter": {
   "notes": "The spec says that both letters of digraphs which are always capitalized together (such as \"IJ\" in Dutch) should be matched by ::first-letter, but no browser has ever implemented this.", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 9", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 11.6", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://www.w3.org/TR/css3-selectors/#first-letter"
  }, 
  "css-first-line": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://drafts.csswg.org/selectors-3/#first-line"
  }, 
  "css-fixed": {
   "notes": "", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 7", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 8"
   }, 
   "url": "https://www.w3.org/TR/CSS21/visuren.html#fixed-positioning"
  }, 
  "css-focus-visible": {
   "notes": "Previously drafted as `:focus-ring`", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.csswg.org/selectors-4/#the-focus-visible-pseudo"
  }, 
  "css-focus-within": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 60", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 52", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 47", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://drafts.csswg.org/selectors-4/#the-focus-within-pseudo"
  }, 
  "css-font-rendering-controls": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 60", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 58", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 47", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.3"
   }, 
   "url": "https://www.w3.org/TR/css-fonts-4/#font-display-desc"
  }, 
  "css-font-stretch": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 48", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 9", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 35", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-fonts-3/#font-stretch-prop"
  }, 
  "css-gencontent": {
   "notes": "For content to appear in pseudo-elements, the `content` property must be set (but may be an empty string).", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/CSS21/generate.html"
  }, 
  "css-gradients": {
   "notes": "Syntax used by browsers with prefixed support may be incompatible with that for proper support.\r\n\r\nSupport can be somewhat emulated in older IE versions using the non-standard \"gradient\" filter. \r\n\r\nFirefox 10+, Opera 11.6+, Chrome 26+ and IE10+ also support the new \"to (side)\" syntax.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 26", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 36", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 12.1", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "a 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "a 7.0"
   }, 
   "url": "https://www.w3.org/TR/css3-images/"
  }, 
  "css-grid": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 57", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 52", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 44", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://www.w3.org/TR/css3-grid-layout/"
  }, 
  "css-hanging-punctuation": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 14", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://drafts.csswg.org/css-text-3/#hanging-punctuation-property"
  }, 
  "css-has": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.csswg.org/selectors-4/#relational"
  }, 
  "css-hyphens": {
   "notes": "Chrome < 55 and Android 4.0 Browser support \"-webkit-hyphens: none\", but not the \"auto\" property. It is [advisable to set the @lang attribute](http://blog.adrianroselli.com/2015/01/on-use-of-lang-attribute.html) on the HTML element to enable hyphenation support and improve accessibility.", 
   "support": {
    "Android Browser": "a 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "a 55", 
    "Chrome for Android": "a 67", 
    "Edge": "n 18", 
    "Firefox": "y 43", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "a 42", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css3-text/#hyphenation"
  }, 
  "css-image-orientation": {
   "notes": "Opening the image in a new tab in Chrome results in the image shown in the orientation according to the EXIF data.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "y 26", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "a 3.2"
   }, 
   "url": "https://www.w3.org/TR/css3-images/#image-orientation"
  }, 
  "css-image-set": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://drafts.csswg.org/css-images-4/#image-set-notation"
  }, 
  "css-in-out-of-range": {
   "notes": "Note that `<input type=\"range\">` can never match `:out-of-range` because the user cannot input such a value, and if the initial value is outside the range, the browser immediately clamps it to the minimum or maximum (as appropriate) bound of the range.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 10", 
    "Chrome": "y 53", 
    "Chrome for Android": "y 67", 
    "Edge": "a 13", 
    "Firefox": "y 50", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 40", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://www.w3.org/TR/selectors4/#range-pseudos"
  }, 
  "css-indeterminate-pseudo": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 10", 
    "Chrome": "y 39", 
    "Chrome for Android": "y 67", 
    "Edge": "a 12", 
    "Firefox": "y 51", 
    "Firefox for Android": "a 60", 
    "IE": "a 9", 
    "IE Mobile": "a 10", 
    "Opera": "y 26", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://drafts.csswg.org/selectors-4/#indeterminate"
  }, 
  "css-initial-letter": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-inline/#initial-letter-styling"
  }, 
  "css-initial-value": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 19", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.2", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://www.w3.org/TR/css-values/#common-keywords"
  }, 
  "css-letter-spacing": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 30", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 17", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://www.w3.org/TR/CSS2/text.html#propdef-letter-spacing"
  }, 
  "css-line-clamp": {
   "notes": "As there is no specification and the property is dependent on an outdated implementation of flexbox (hence `display: -webkit-box`) it is unlikely that other browsers will support the property as-is, although an alternative solution may at some point replace it.\r\n\r\nOlder (presto-based) versions of the Opera browser have also supported the same effect using the proprietary `-o-ellipsis-lastline;` value for `text-overflow`.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "y 17", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://developer.apple.com/library/safari/documentation/AppleApplications/Reference/SafariCSSRef/Articles/StandardCSSProperties.html#//apple_ref/doc/uid/TP30001266-WebKit_SpecificUnsupportedProperties"
  }, 
  "css-logical-props": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 69", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "y 41", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-logical-1/"
  }, 
  "css-marker-pseudo": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.3"
   }, 
   "url": "https://drafts.csswg.org/css-lists-3/#marker-pseudo-element"
  }, 
  "css-masks": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "a 18", 
    "Firefox": "y 53", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-masking-1/"
  }, 
  "css-matches-pseudo": {
   "notes": "Most browsers support this spelled as a prefixed `:-vendor-any()` pseudo-class.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.w3.org/TR/selectors4/#matches"
  }, 
  "css-media-interaction": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 41", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 28", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.w3.org/TR/mediaqueries-4/#mf-interaction"
  }, 
  "css-media-resolution": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 29", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 16", 
    "Firefox for Android": "y 60", 
    "IE": "a 9", 
    "IE Mobile": "a 10", 
    "Opera": "y 12.1", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css3-mediaqueries/#resolution"
  }, 
  "css-mediaqueries": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/css3-mediaqueries/"
  }, 
  "css-mixblendmode": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 41", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 32", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 29", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "a 7.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "a 8"
   }, 
   "url": "https://www.w3.org/TR/compositing-1/#mix-blend-mode"
  }, 
  "css-motion-paths": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 46", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 33", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/motion-1/"
  }, 
  "css-namespaces": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.2"
   }, 
   "url": "https://drafts.csswg.org/css-namespaces/"
  }, 
  "css-not-sel-list": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 68", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 61", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.w3.org/TR/selectors4/#negation"
  }, 
  "css-nth-child-of": {
   "notes": "For support information for just `:nth-child()` see [CSS3 selector support](#feat=css-sel3)", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://drafts.csswg.org/selectors/#the-nth-child-pseudo"
  }, 
  "css-opacity": {
   "notes": "Transparency for elements in IE8 and older can be achieved using the proprietary \"filter\" property and does not work well with PNG images using alpha transparency.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/css3-color/"
  }, 
  "css-optional-pseudo": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 15", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://drafts.csswg.org/selectors-4/#optional-pseudo"
  }, 
  "css-overflow-anchor": {
   "notes": "Mozilla has discussed a similar feature in [Bug 43114](https://bugzilla.mozilla.org/show_bug.cgi?id=43114).", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 56", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 43", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://wicg.github.io/ScrollAnchoring/"
  }, 
  "css-overscroll-behavior": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 65", 
    "Chrome for Android": "y 67", 
    "Edge": "y 18", 
    "Firefox": "y 59", 
    "Firefox for Android": "n 60", 
    "IE": "a 10", 
    "IE Mobile": "a 10", 
    "Opera": "y 52", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://wicg.github.io/overscroll-behavior/"
  }, 
  "css-page-break": {
   "notes": "Not all mobile browsers offer print support; support listed for these is based on browser engine capability.", 
   "support": {
    "Android Browser": "a 2.1", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "a 4", 
    "Chrome for Android": "a 67", 
    "Edge": "a 12", 
    "Firefox": "a 2", 
    "Firefox for Android": "a 60", 
    "IE": "a 5.5", 
    "IE Mobile": "a 10", 
    "Opera": "a 15", 
    "Opera Mini": "y all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "a 3.1", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "a 3.2"
   }, 
   "url": "https://www.w3.org/TR/CSS2/page.html#page-breaks"
  }, 
  "css-paged-media": {
   "notes": "Currently no browsers appear to support the `marks` & `bleed` properties from the latest version of the specification.\r\n\r\n", 
   "support": {
    "Android Browser": "u 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "u 10", 
    "Chrome": "y 15", 
    "Chrome for Android": "y 67", 
    "Edge": "a 12", 
    "Firefox": "a 19", 
    "Firefox for Android": "a 60", 
    "IE": "a 8", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "u all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.csswg.org/css-page-3/"
  }, 
  "css-paint-api": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 65", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 52", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.css-houdini.org/css-paint-api/"
  }, 
  "css-placeholder": {
   "notes": "Partial support refers to using alternate names:\r\n`::-webkit-input-placeholder` for Chrome/Safari/Opera ([Chrome issue #623345](https://bugs.chromium.org/p/chromium/issues/detail?id=623345))\r\n`:-ms-input-placeholder` for IE. \r\n`::-ms-input-placeholder` for Edge (also supports webkit prefix)", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 57", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 51", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 44", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 7.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://drafts.csswg.org/css-pseudo-4/#placeholder-pseudo"
  }, 
  "css-placeholder-shown": {
   "notes": "For support of styling the actual placeholder text itself, see [CSS ::placeholder](https://caniuse.com/#feat=css-placeholder)", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 47", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 51", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 34", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.w3.org/TR/selectors4/#placeholder"
  }, 
  "css-read-only-write": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 36", 
    "Chrome for Android": "y 67", 
    "Edge": "y 13", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 23", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/scripting.html#selector-read-only"
  }, 
  "css-rebeccapurple": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 38", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 33", 
    "Firefox for Android": "y 60", 
    "IE": "a 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 25", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 7", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 8"
   }, 
   "url": "https://www.w3.org/TR/css-color-4/#valdef-color-rebeccapurple"
  }, 
  "css-reflections": {
   "notes": "Similar effect can be achieved in Firefox 4+ using the -moz-element() background property", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "http://webkit.org/blog/182/css-reflections/"
  }, 
  "css-regions": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css3-regions/"
  }, 
  "css-repeating-gradients": {
   "notes": "Firefox 10+, Chrome 26+ and Opera 11.6+ also support the new \"to (side)\" syntax.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 26", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 16", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 12.1", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://www.w3.org/TR/css3-images/#repeating-gradients"
  }, 
  "css-resize": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 5", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css3-ui/#resize"
  }, 
  "css-revert-value": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 9.3"
   }, 
   "url": "https://www.w3.org/TR/css-cascade-4/#valdef-all-revert"
  }, 
  "css-rrggbbaa": {
   "notes": "Support in Android WebView is currently disabled due to [this issue](https://bugs.chromium.org/p/chromium/issues/detail?id=618472)", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 62", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 49", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 52", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://drafts.csswg.org/css-color/#hex-notation"
  }, 
  "css-scroll-behavior": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 61", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 36", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 48", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.csswg.org/cssom-view/#propdef-scroll-behavior"
  }, 
  "css-scrollbar": {
   "notes": "Currently scrollbar styling doesn't appear to be on any standards track.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "a 5.5", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://webkit.org/blog/363/styling-scrollbars/"
  }, 
  "css-sel2": {
   "notes": "Support for `:visited` styling [varies across browsers](http://sixrevisions.com/css/visited-pseudo-class-strange/) due to security concerns.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 7", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/CSS21/selector.html"
  }, 
  "css-sel3": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.2", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/css3-selectors/"
  }, 
  "css-selection": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 62", 
    "Firefox for Android": "n 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11.5", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-pseudo-4/#selectordef-selection"
  }, 
  "css-shapes": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 37", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 62", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 24", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://www.w3.org/TR/css-shapes/"
  }, 
  "css-snappoints": {
   "notes": "Works in the iOS WKWebView, but not UIWebView.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 69", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "a 39", 
    "Firefox for Android": "a 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://www.w3.org/TR/css-snappoints-1/"
  }, 
  "css-sticky": {
   "notes": "", 
   "support": {
    "Android Browser": "a 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "a 56", 
    "Chrome for Android": "a 67", 
    "Edge": "a 16", 
    "Firefox": "y 59", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "a 42", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.csswg.org/css-position/#sticky-pos"
  }, 
  "css-supports-api": {
   "notes": "See also [@supports in CSS](#feat=css-featurequeries)", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 28", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 23", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://drafts.csswg.org/css-conditional/#the-css-interface"
  }, 
  "css-table": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3", 
    "Firefox for Android": "y 60", 
    "IE": "y 8", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/CSS21/tables.html"
  }, 
  "css-text-align-last": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 47", 
    "Chrome for Android": "y 67", 
    "Edge": "a 12", 
    "Firefox": "y 49", 
    "Firefox for Android": "y 60", 
    "IE": "a 5.5", 
    "IE Mobile": "a 10", 
    "Opera": "y 34", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css3-text/#text-align-last-property"
  }, 
  "css-text-indent": {
   "notes": "", 
   "support": {
    "Android Browser": "a 2.1", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "a 4", 
    "Chrome for Android": "a 67", 
    "Edge": "a 12", 
    "Firefox": "a 2", 
    "Firefox for Android": "a 60", 
    "IE": "a 5.5", 
    "IE Mobile": "a 10", 
    "Opera": "a 9", 
    "Opera Mini": "a all", 
    "Opera Mobile": "a 10", 
    "QQ Browser": "a 1.2", 
    "Safari": "a 3.1", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "a 3.2"
   }, 
   "url": "https://drafts.csswg.org/css-text-3/#text-indent-property"
  }, 
  "css-text-justify": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "a 12", 
    "Firefox": "y 55", 
    "Firefox for Android": "y 60", 
    "IE": "a 8", 
    "IE Mobile": "a 10", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.csswg.org/css-text-3/#text-justify-property"
  }, 
  "css-text-orientation": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 41", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 51", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 35", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://drafts.csswg.org/css-writing-modes-3/#text-orientation"
  }, 
  "css-textshadow": {
   "notes": "Opera Mini ignores the blur-radius set, so no blur effect is visible. Text-shadow behavior can be somewhat emulated in older IE versions using the non-standard \"dropshadow\" or \"glow\" filters.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/css-text-decor-3/#text-shadow-property"
  }, 
  "css-touch-action": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 36", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 52", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 23", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "a 9.3"
   }, 
   "url": "https://www.w3.org/TR/pointerevents/#the-touch-action-css-property"
  }, 
  "css-transitions": {
   "notes": "Support listed is for `transition` properties as well as the `transitionend` event.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 26", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 16", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 12.1", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://www.w3.org/TR/css3-transitions/"
  }, 
  "css-unset-value": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 41", 
    "Chrome for Android": "y 67", 
    "Edge": "y 13", 
    "Firefox": "y 27", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 28", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.3"
   }, 
   "url": "https://www.w3.org/TR/css-cascade-3/#inherit-initial"
  }, 
  "css-variables": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 49", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 31", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 36", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.3"
   }, 
   "url": "https://www.w3.org/TR/css-variables/"
  }, 
  "css-widows-orphans": {
   "notes": "Some older WebKit-based browsers recognize the properties, but do not appear to have actual support", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 25", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "y 8", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://drafts.csswg.org/css-break-3/#widows-orphans"
  }, 
  "css-writing-mode": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 48", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 41", 
    "Firefox for Android": "y 60", 
    "IE": "a 5.5", 
    "IE Mobile": "n 11", 
    "Opera": "y 35", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://drafts.csswg.org/css-writing-modes-3/#block-flow"
  }, 
  "css-zoom": {
   "notes": "Originally implemented only in Internet Explorer. Although several other browsers support the property, using `transform: scale()` is the recommended solution to scale content.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "y 5.5", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://msdn.microsoft.com/en-us/library/ms531189(v=vs.85).aspx"
  }, 
  "css3-attr": {
   "notes": "See the [generated content](/#feat=css-gencontent) table for support for `attr()` for the `content` property.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-values/#attr-notation"
  }, 
  "css3-boxsizing": {
   "notes": "Firefox versions before 57 also supported the `padding-box` value for `box-sizing`, though this value was been removed from the specification and later versions of the browser.", 
   "support": {
    "Android Browser": "y 4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 10", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 29", 
    "Firefox for Android": "y 60", 
    "IE": "y 8", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://www.w3.org/TR/css-sizing/#box-sizing"
  }, 
  "css3-colors": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.0", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/css3-color/"
  }, 
  "css3-cursors": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 7", 
    "Chrome": "y 5", 
    "Chrome for Android": "y 67", 
    "Edge": "y 14", 
    "Firefox": "y 4", 
    "Firefox for Android": "n 60", 
    "IE": "y 9", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css3-ui/#cursor"
  }, 
  "css3-cursors-grab": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 68", 
    "Chrome for Android": "n 67", 
    "Edge": "y 15", 
    "Firefox": "y 27", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css3-ui/#cursor"
  }, 
  "css3-cursors-newer": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 37", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 24", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 24", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css3-ui/#cursor"
  }, 
  "css3-tabsize": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 42", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 29", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "a 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "a 7.0"
   }, 
   "url": "https://www.w3.org/TR/css3-text/#tab-size"
  }, 
  "currentcolor": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://www.w3.org/TR/css3-color/#currentcolor"
  }, 
  "custom-elements": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 33", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 20", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/custom-elements/"
  }, 
  "custom-elementsv1": {
   "notes": "Chrome 36+/Opera 20+ implemented a previous version of Custom Elements (v0) that used `.registerElement()`. Other browsers are implementing v1, `window.customElements.define()`.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 67", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "a 41", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "a 10.1", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "a 10.3"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/scripting.html#custom-elements"
  }, 
  "customevent": {
   "notes": "Not supported in some versions of Android's old WebKit-based WebView.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 15", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 11", 
    "Firefox for Android": "y 60", 
    "IE": "a 9", 
    "IE Mobile": "a 10", 
    "Opera": "y 11.6", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://dom.spec.whatwg.org/#interface-customevent"
  }, 
  "datalist": {
   "notes": "While most commonly used on text fields, datalists can also be used on other input types. IE11 supports the element on `range` fields. Chrome and Opera also support datalists to suggest given values on `range`, `color` and date/time fields. ", 
   "support": {
    "Android Browser": "a 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "a 20", 
    "Chrome for Android": "y 67", 
    "Edge": "a 12", 
    "Firefox": "a 4", 
    "Firefox for Android": "a 60", 
    "IE": "a 10", 
    "IE Mobile": "n 11", 
    "Opera": "a 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#the-datalist-element"
  }, 
  "dataset": {
   "notes": "Partial support refers to being able to use `data-*` attributes and access them using `getAttribute`. \r\n\r\n\"Supported\" refers to accessing the values using the `dataset` property. Current spec only refers to support on HTML elements, only some browsers also have support for SVG/MathML elements.", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 7", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 6", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 11.1", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 11.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes"
  }, 
  "datauri": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "a 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "a 8", 
    "IE Mobile": "a 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://tools.ietf.org/html/rfc2397"
  }, 
  "details": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 12", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 49", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#the-details-element"
  }, 
  "deviceorientation": {
   "notes": "Partial support refers to the lack of compassneedscalibration event. Partial support also refers to the lack of devicemotion event support for Chrome 30- and Opera. Opera Mobile 14 lost the ondevicemotion event support. Firefox 3.6, 4 and 5 support the non-standard [MozOrientation](https://developer.mozilla.org/en/DOM/MozOrientation) event.", 
   "support": {
    "Android Browser": "a 3", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 10", 
    "Chrome": "a 7", 
    "Chrome for Android": "a 67", 
    "Edge": "y 12", 
    "Firefox": "a 6", 
    "Firefox for Android": "a 60", 
    "IE": "a 11", 
    "IE Mobile": "y 11", 
    "Opera": "a 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "a 4.2"
   }, 
   "url": "https://www.w3.org/TR/orientation-event/"
  }, 
  "devicepixelratio": {
   "notes": "As the page is zoomed in the number of device pixels that one CSS pixel covers increases, and therefore the value of devicePixelRatio will also increase.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 18", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 11.6", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://drafts.csswg.org/cssom-view/#dom-window-devicepixelratio"
  }, 
  "dialog": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 37", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 24", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#the-dialog-element"
  }, 
  "dispatchevent": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.2", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://dom.spec.whatwg.org/#dom-eventtarget-dispatchevent"
  }, 
  "do-not-track": {
   "notes": "Partial support refers to the doNotTrack field being misnamed, or being attached to an object other than `navigator` (e.g. `window`).", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 10", 
    "Chrome": "y 23", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "y 32", 
    "Firefox for Android": "y 60", 
    "IE": "a 11", 
    "IE Mobile": "a 11", 
    "Opera": "y 12", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.w3.org/TR/tracking-dnt/"
  }, 
  "document-currentscript": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 29", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 16", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 8", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 8"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/dom.html#dom-document-currentscript"
  }, 
  "document-evaluate-xpath": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 9.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/DOM-Level-3-XPath/xpath.html#XPathEvaluator-evaluate"
  }, 
  "document-execcommand": {
   "notes": "To determine what commands are supported, see `Document.queryCommandSupported()`", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 9", 
    "Firefox for Android": "y 60", 
    "IE": "y 5.5", 
    "IE Mobile": "y 11", 
    "Opera": "y 10.0", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://w3c.github.io/editing/execCommand.html#execcommand()"
  }, 
  "document-scrollingelement": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 44", 
    "Chrome for Android": "y 67", 
    "Edge": "y 14", 
    "Firefox": "y 48", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 31", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://drafts.csswg.org/cssom-view/#dom-document-scrollingelement"
  }, 
  "documenthead": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 11", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/#dom-document-head"
  }, 
  "dom-manip-convenience": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 54", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "y 49", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 41", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://dom.spec.whatwg.org/#interface-childnode"
  }, 
  "dom-range": {
   "notes": "See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/Range) for feature support details", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://dom.spec.whatwg.org/#ranges"
  }, 
  "domcontentloaded": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/syntax.html#stop-parsing"
  }, 
  "dommatrix": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 10", 
    "Chrome": "a 8", 
    "Chrome for Android": "y 67", 
    "Edge": "a 12", 
    "Firefox": "a 33", 
    "Firefox for Android": "y 60", 
    "IE": "a 10", 
    "IE Mobile": "a 10", 
    "Opera": "a 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "a 5", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "a 5.0"
   }, 
   "url": "https://drafts.fxtf.org/geometry/#dommatrix"
  }, 
  "download": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 14", 
    "Chrome for Android": "y 67", 
    "Edge": "y 13", 
    "Firefox": "y 20", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/semantics.html#downloading-resources"
  }, 
  "dragndrop": {
   "notes": "`dataTransfer.items` only supported by Chrome.\r\n\r\nCurrently no browser supports the `dropzone` attribute.\r\n\r\nFirefox supports any kind of DOM elements for `.setDragImage`. Chrome must have either an `HTMLImageElement` or any kind of DOM elements attached to the DOM and within the viewport of the browser for `.setDragImage`.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 4", 
    "Chrome for Android": "n 67", 
    "Edge": "y 18", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "n 60", 
    "IE": "a 5.5", 
    "IE Mobile": "y 10", 
    "Opera": "y 12", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/interaction.html#dnd"
  }, 
  "element-closest": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 41", 
    "Chrome for Android": "y 67", 
    "Edge": "y 15", 
    "Firefox": "y 35", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 28", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://dom.spec.whatwg.org/#dom-element-closest"
  }, 
  "element-from-point": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 15", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3", 
    "Firefox for Android": "y 60", 
    "IE": "y 6", 
    "IE Mobile": "y 10", 
    "Opera": "y 11", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://www.w3.org/TR/cssom-view-1/#dom-document-elementfrompoint"
  }, 
  "eme": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 42", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 38", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 29", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 12", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://w3c.github.io/encrypted-media/"
  }, 
  "eot": {
   "notes": "Proposal by Microsoft, being considered for W3C standardization.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "y 6", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/Submission/EOT/"
  }, 
  "es5": {
   "notes": "As the specification includes many JavaScript features, un-numbered partial support varies widely and is shown in detail on the [ECMAScript 5 compatibilty tables](http://kangax.github.io/compat-table/es5/) by Kangax.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 23", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 21", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/5.1/"
  }, 
  "es6-class": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 49", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 45", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 36", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/6.0/#sec-class-definitions"
  }, 
  "es6-generators": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 39", 
    "Chrome for Android": "y 67", 
    "Edge": "y 13", 
    "Firefox": "y 26", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 26", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "http://www.ecma-international.org/ecma-262/6.0/#"
  }, 
  "es6-module": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 61", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 60", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 48", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-type"
  }, 
  "es6-module-dynamic-import": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 63", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 50", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://github.com/tc39/proposal-dynamic-import/blob/master/HTML%20Integration.md"
  }, 
  "es6-number": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 34", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 32", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 21", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/6.0/#sec-number-objects"
  }, 
  "es6-string-includes": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 41", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 40", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 28", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "http://www.ecma-international.org/ecma-262/6.0/#sec-string.prototype.includes"
  }, 
  "eventsource": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 6", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 6", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 11", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/comms.html#server-sent-events"
  }, 
  "feature-policy": {
   "notes": "Standard support includes the HTTP header (`Feature-Policy`), `allow` attribute on iframes, and corresponding JS API.", 
   "support": {
    "Android Browser": "a 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "a 60", 
    "Chrome for Android": "a 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "a 47", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "a 11.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 11.0"
   }, 
   "url": "https://wicg.github.io/feature-policy/"
  }, 
  "fetch": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 42", 
    "Chrome for Android": "y 67", 
    "Edge": "y 14", 
    "Firefox": "y 39", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 29", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://fetch.spec.whatwg.org/"
  }, 
  "fieldset-disabled": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 20", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "a 6", 
    "IE Mobile": "a 11", 
    "Opera": "y 10.0", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#attr-fieldset-disabled"
  }, 
  "fileapi": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 38", 
    "Chrome for Android": "y 67", 
    "Edge": "a 12", 
    "Firefox": "y 28", 
    "Firefox for Android": "y 60", 
    "IE": "a 10", 
    "IE Mobile": "a 11", 
    "Opera": "y 25", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.w3.org/TR/FileAPI/"
  }, 
  "filereader": {
   "notes": "", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 6", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.6", 
    "Firefox for Android": "y 60", 
    "IE": "a 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 11.1", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://www.w3.org/TR/FileAPI/#dfn-filereader"
  }, 
  "filereadersync": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 15", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 8", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 11.6", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11.5", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://w3c.github.io/FileAPI/#FileReaderSync"
  }, 
  "filesystem": {
   "notes": "The File API: Directories and System specification is no longer being maintained and support may be dropped in future versions.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/file-system-api/"
  }, 
  "flac": {
   "notes": "Support refers to this format's use in the `audio` element, not other conditions.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 56", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 51", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 42", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "n 1.2", 
    "Safari": "a 11", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://xiph.org/flac/format.html"
  }, 
  "flexbox": {
   "notes": "Most partial support refers to supporting an [older version](https://www.w3.org/TR/2009/WD-css3-flexbox-20090723/) of the specification or an [older syntax](https://www.w3.org/TR/2012/WD-css3-flexbox-20120322/).", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 29", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 28", 
    "Firefox for Android": "y 60", 
    "IE": "a 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 17", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.w3.org/TR/css3-flexbox/"
  }, 
  "flow-root": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 58", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 53", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 45", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-display-3/#valdef-display-flow-root"
  }, 
  "focusin-focusout-events": {
   "notes": "In browsers that don't support these events, one alternative is to use a capture phase event listener for the `focus` and/or `blur` events.", 
   "support": {
    "Android Browser": "y 4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 15", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 52", 
    "Firefox for Android": "y 60", 
    "IE": "y 6", 
    "IE Mobile": "y 10", 
    "Opera": "y 11.6", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://www.w3.org/TR/DOM-Level-3-Events/#event-type-focusin"
  }, 
  "font-family-system-ui": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 56", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "a 43", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 43", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://drafts.csswg.org/css-fonts-4/#system-ui-def"
  }, 
  "font-feature": {
   "notes": "Whenever possible, font-variant shorthand property or an associated longhand property, font-variant-ligatures, font-variant-caps, font-variant-east-asian, font-variant-alternates, font-variant-numeric or font-variant-position should be used. This property is a low-level feature designed to handle special cases where no other way to enable or access an OpenType font feature exists. In particular, this CSS property shouldn't be used to enable small caps.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 48", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 34", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "n 11", 
    "Opera": "y 35", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 9.3"
   }, 
   "url": "http://w3.org/TR/css3-fonts/#font-rend-props"
  }, 
  "font-kerning": {
   "notes": "Browsers with support for [font feature settings](https://caniuse.com/#feat=font-feature) can also set kerning value.", 
   "support": {
    "Android Browser": "y 4.4.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 33", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 34", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 20", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css3-fonts/#font-kerning-prop"
  }, 
  "font-loading": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 35", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 41", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 22", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.w3.org/TR/css-font-loading-3/"
  }, 
  "font-size-adjust": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "y 3", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-fonts-3/#font-size-adjust-prop"
  }, 
  "font-smooth": {
   "notes": "Though present in early (2002) drafts of CSS3 Fonts, `font-smooth` has been removed from this specification and is currently not on the standard track.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/WD-font/#font-smooth"
  }, 
  "font-unicode-range": {
   "notes": "Partial support indicates that unnecessary code-ranges are downloaded by the browser - see [browser test matrix](https://docs.google.com/a/chromium.org/spreadsheets/d/18h-1gaosu4-KYxH8JUNL6ZDuOsOKmWfauoai3CS3hPY/edit?pli=1#gid=0).", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "a 10", 
    "Chrome": "y 36", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "y 44", 
    "Firefox for Android": "y 60", 
    "IE": "a 9", 
    "IE Mobile": "a 10", 
    "Opera": "y 23", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://drafts.csswg.org/css-fonts/#unicode-range-desc"
  }, 
  "font-variant-alternates": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "y 34", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 9.3"
   }, 
   "url": "https://www.w3.org/TR/css-fonts-3/#propdef-font-variant-alternates"
  }, 
  "fontface": {
   "notes": "Not supported by IE Mobile 9 and below.", 
   "support": {
    "Android Browser": "y 4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.0", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.2", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.2"
   }, 
   "url": "https://www.w3.org/TR/css3-webfonts/"
  }, 
  "form-attribute": {
   "notes": "", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 10", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 9.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#attr-fae-form"
  }, 
  "form-submit-attributes": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 15", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.6", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#attributes-for-form-submission"
  }, 
  "form-validation": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 10", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "a 10", 
    "Opera": "y 10.0", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#client-side-form-validation"
  }, 
  "forms": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 10", 
    "Chrome": "y 61", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "a 4", 
    "Firefox for Android": "a 60", 
    "IE": "a 10", 
    "IE Mobile": "a 10", 
    "Opera": "y 52", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "a 4", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "a 4.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#forms"
  }, 
  "fullscreen": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "a 12", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://fullscreen.spec.whatwg.org/"
  }, 
  "gamepad": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 25", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 29", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 24", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://www.w3.org/TR/gamepad/"
  }, 
  "geolocation": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 5", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 16", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/geolocation-API/"
  }, 
  "getboundingclientrect": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 12", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.6", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://www.w3.org/TR/cssom-view/#dom-element-getboundingclientrect"
  }, 
  "getcomputedstyle": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 11", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.6", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://www.w3.org/TR/cssom/#dom-window-getcomputedstyle"
  }, 
  "getelementsbyclassname": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://dom.spec.whatwg.org/#dom-document-getelementsbyclassname"
  }, 
  "getrandomvalues": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 11", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 21", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://www.w3.org/TR/WebCryptoAPI/#RandomSource-method-getRandomValues"
  }, 
  "gyroscope": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 67", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/gyroscope/"
  }, 
  "hardwareconcurrency": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 37", 
    "Chrome for Android": "y 67", 
    "Edge": "y 15", 
    "Firefox": "y 48", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 24", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/workers.html#navigator.hardwareconcurrency"
  }, 
  "hashchange": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.2", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 5", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.6", 
    "Firefox for Android": "y 60", 
    "IE": "y 8", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.6", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/browsers.html#the-hashchangeevent-interface"
  }, 
  "heif": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "http://nokiatech.github.io/heif/technical.html"
  }, 
  "hevc": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "a 12", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "a 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "a 11", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://www.itu.int/rec/T-REC-H.265"
  }, 
  "hidden": {
   "notes": "The hidden state can be easily overridden with a CSS `display` property set to anything other than `none`.", 
   "support": {
    "Android Browser": "y 4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 6", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 11.1", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 11.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/interaction.html#the-hidden-attribute"
  }, 
  "high-resolution-time": {
   "notes": "The timestamp is not actually high-resolution. To mitigate security threats such as Spectre, browsers currently round the result to varying degrees.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 24", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 15", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 8", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.w3.org/TR/hr-time/"
  }, 
  "history": {
   "notes": "Older iOS versions and Android 4.0.4 claim support, but implementation is too buggy to be useful.", 
   "support": {
    "Android Browser": "y 4.2", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 5", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 11.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/browsers.html#dom-history-pushstate"
  }, 
  "html-media-capture": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.2", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "u 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://w3c.github.io/html-media-capture/"
  }, 
  "html5semantic": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 26", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 21", 
    "Firefox for Android": "y 60", 
    "IE": "a 9", 
    "IE Mobile": "a 10", 
    "Opera": "y 15", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/semantics.html#sections"
  }, 
  "http-live-streaming": {
   "notes": "HLS is being replaced by Dynamic Adaptive Streaming over HTTP (aka MPEG-DASH)", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://tools.ietf.org/html/rfc8216"
  }, 
  "http2": {
   "notes": "See also support for [the SPDY protocol](https://caniuse.com/#feat=spdy), precursor of HTTP2.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 41", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 36", 
    "Firefox for Android": "y 60", 
    "IE": "a 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 28", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "http://http2.github.io/http2-spec/index.html"
  }, 
  "iframe-sandbox": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.2", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 28", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/embedded-content.html#attr-iframe-sandbox"
  }, 
  "iframe-seamless": {
   "notes": "Chrome 20-26 had partial support behind a flag, though this was [later removed](https://bugs.chromium.org/p/chromium/issues/detail?id=229421).", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/2011/WD-html5-20110525/the-iframe-element.html#attr-iframe-seamless"
  }, 
  "iframe-srcdoc": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 20", 
    "Chrome for Android": "y 67", 
    "Edge": "y 18", 
    "Firefox": "y 25", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/embedded-content.html#attr-iframe-srcdoc"
  }, 
  "ime": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/ime-api/"
  }, 
  "img-naturalwidth-naturalheight": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-naturalwidth"
  }, 
  "imports": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 36", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 23", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/html-imports/"
  }, 
  "indeterminate-checkbox": {
   "notes": "Indeterminacy does not affect a checkbox's checkedness state. It merely affects how the checkbox is displayed.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 28", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.6", 
    "Firefox for Android": "y 60", 
    "IE": "y 6", 
    "IE Mobile": "y 10", 
    "Opera": "y 11.6", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 12"
   }, 
   "url": "https://html.spec.whatwg.org/#dom-input-indeterminate"
  }, 
  "indexeddb": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 24", 
    "Chrome for Android": "y 67", 
    "Edge": "a 12", 
    "Firefox": "y 16", 
    "Firefox for Android": "y 60", 
    "IE": "a 10", 
    "IE Mobile": "a 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.w3.org/TR/IndexedDB/"
  }, 
  "indexeddb2": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 58", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 51", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 45", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://www.w3.org/TR/IndexedDB-2/"
  }, 
  "inline-block": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3", 
    "Firefox for Android": "y 60", 
    "IE": "y 8", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/CSS21/visuren.html#fixed-positioning"
  }, 
  "innertext": {
   "notes": "This test only checks that the property exists and works correctly in a very simple case.\r\n[This blog post by kangax](http://perfectionkills.com/the-poor-misunderstood-innerText/) explains the history of this property, gives much more detailed cross-browser compatibility information, and gives a detailed strawman specification for the property.\r\n`Node.innerText` is similar to, but has some important differences from, the standard [`Node.textContent`](https://caniuse.com/#feat=textcontent) property.", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 45", 
    "Firefox for Android": "y 60", 
    "IE": "y 6", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.2", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/dom.html#the-innertext-idl-attribute"
  }, 
  "input-autocomplete-onoff": {
   "notes": "This support information does not include support for other `autocomplete` values.\r\n\r\nAs described in detail below, many modern browsers ignore the `off` value on certain fields in certain cases intentionally in order to give the user more control over autofilling fields. One example is the use of password managers.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "a 27", 
    "Chrome for Android": "y 67", 
    "Edge": "a 12", 
    "Firefox": "a 30", 
    "Firefox for Android": "y 60", 
    "IE": "a 11", 
    "IE Mobile": "a 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "a 1.2", 
    "Safari": "a 7", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#autofill"
  }, 
  "input-color": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 20", 
    "Chrome for Android": "y 67", 
    "Edge": "y 14", 
    "Firefox": "y 29", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 17", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 12", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#color-state-(type=color)"
  }, 
  "input-datetime": {
   "notes": "There used to also be a `datetime` type, but it was [dropped from the HTML spec](https://github.com/whatwg/html/issues/336).", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 25", 
    "Chrome for Android": "y 67", 
    "Edge": "y 13", 
    "Firefox": "a 57", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 9", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "a 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#date-state-(type=date)"
  }, 
  "input-email-tel-url": {
   "notes": "Browsers without support for these types will fall back to using the \"text\" type.", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 5", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#telephone-state-(type=tel)"
  }, 
  "input-event": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 15", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.6", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 12.1", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#event-input-input"
  }, 
  "input-file-accept": {
   "notes": "Not supported means any file can be picked as if the `accept` attribute was not set, unless otherwise noted.\r\n\r\nOn Windows, files that do not apply are hidden. On OSX they are grayed out and disabled.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 26", 
    "Chrome for Android": "a 67", 
    "Edge": "n 18", 
    "Firefox": "y 37", 
    "Firefox for Android": "n 60", 
    "IE": "y 10", 
    "IE Mobile": "a 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "a 8"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#attr-input-accept"
  }, 
  "input-file-directory": {
   "notes": "Lack of support in mobile browsers may be due to the OS file picker not having support for selecting a directory.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 30", 
    "Chrome for Android": "n 67", 
    "Edge": "y 14", 
    "Firefox": "y 50", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 17", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://wicg.github.io/entries-api/#dom-htmlinputelement-webkitdirectory"
  }, 
  "input-file-multiple": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 5", 
    "Chrome for Android": "a 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.6", 
    "Firefox for Android": "n 60", 
    "IE": "y 10", 
    "IE Mobile": "n 11", 
    "Opera": "y 10.6", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "a 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#attr-input-multiple"
  }, 
  "input-inputmode": {
   "notes": "Firefox OS is reported to have partial support for this property as `x-inputmode`.\r\n\r\nBlink-based browsers appear to recognize the `inputMode` property on `input` & `textarea` fields though it is unclear what effect it currently has as the feature is still in development.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 66", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#input-modalities:-the-inputmode-attribute"
  }, 
  "input-minlength": {
   "notes": "The [`pattern` attribute](https://caniuse.com/#feat=input-pattern) can be used [as an alternative](https://stackoverflow.com/a/10294291) solution for browsers without support.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 40", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "y 51", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 27", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#the-maxlength-and-minlength-attributes"
  }, 
  "input-number": {
   "notes": "", 
   "support": {
    "Android Browser": "a 4", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 10", 
    "Chrome": "y 6", 
    "Chrome for Android": "a 67", 
    "Edge": "y 12", 
    "Firefox": "y 29", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "a 10", 
    "Opera": "y 9", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "a 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#number-state-(type=number)"
  }, 
  "input-pattern": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 10", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "a 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#the-pattern-attribute"
  }, 
  "input-placeholder": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.2", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 11.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#attr-input-placeholder"
  }, 
  "input-range": {
   "notes": "Currently all Android browsers with partial support hide the slider input field by default. However, the element [can be styled](http://tiffanybbrown.com/2012/02/07/input-typerange-and-androids-stock-browser/) to be made visible and usable.", 
   "support": {
    "Android Browser": "y 4.2", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 23", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#range-state-(type=range)"
  }, 
  "input-search": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 26", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 11.6", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#text-(type=text)-state-and-search-state-(type=search)"
  }, 
  "input-selection": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.6", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-textarea/input-setselectionrange"
  }, 
  "insert-adjacent": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 48", 
    "Firefox for Android": "y 60", 
    "IE": "y 6", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://dom.spec.whatwg.org/#dom-element-insertadjacentelement"
  }, 
  "insertadjacenthtml": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 8", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.0", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://www.w3.org/TR/DOM-Parsing/#widl-Element-insertAdjacentHTML-void-DOMString-position-DOMString-text"
  }, 
  "internationalization": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 24", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 29", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-402/1.0/"
  }, 
  "intersectionobserver": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 58", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 55", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 45", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 7.2", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/intersection-observer/"
  }, 
  "intrinsic-width": {
   "notes": "Prefixes are on the values, not the property names (e.g. -webkit-min-content)\r\n\r\nOlder webkit browsers also support the unofficial `intrinsic` value which acts the same as `max-content`.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 46", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 33", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "a 11", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css3-sizing/"
  }, 
  "jpeg2000": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "http://www.itu.int/rec/T-REC-T.800-200208-I"
  }, 
  "jpegxr": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "y 12", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "http://www.itu.int/rec/T-REC-T.832"
  }, 
  "json": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 8", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/5.1/#sec-15.12"
  }, 
  "kerning-pairs-ligatures": {
   "notes": "The `text-rendering` property is specified in SVG, though behavior there is not related to kerning pairs & ligatures.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 18", 
    "Firefox": "y 3", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.2"
   }, 
   "url": "https://www.w3.org/TR/SVG2/painting.html#TextRendering"
  }, 
  "keyboardevent-charcode": {
   "notes": "This property is legacy and deprecated, but its replacement(s) are not yet widely supported.", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3", 
    "Firefox for Android": "n 60", 
    "IE": "y 9", 
    "IE Mobile": "n 11", 
    "Opera": "y 12.1", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://w3c.github.io/uievents/#widl-KeyboardEvent-charCode"
  }, 
  "keyboardevent-code": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 48", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "y 38", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 35", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://www.w3.org/TR/uievents/#widl-KeyboardEvent-code"
  }, 
  "keyboardevent-getmodifierstate": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 30", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 15", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 17", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://www.w3.org/TR/uievents/#widl-KeyboardEvent-getModifierState"
  }, 
  "keyboardevent-key": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 51", 
    "Chrome for Android": "y 67", 
    "Edge": "a 12", 
    "Firefox": "y 29", 
    "Firefox for Android": "y 60", 
    "IE": "a 9", 
    "IE Mobile": "a 10", 
    "Opera": "y 38", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://www.w3.org/TR/uievents/#widl-KeyboardEvent-key"
  }, 
  "keyboardevent-location": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 30", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 15", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 17", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 8"
   }, 
   "url": "https://www.w3.org/TR/uievents/#widl-KeyboardEvent-location"
  }, 
  "keyboardevent-which": {
   "notes": "This property is legacy and deprecated, but its replacement(s) are not yet widely supported.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "a 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "a 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.0", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "a 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://w3c.github.io/uievents/#widl-KeyboardEvent-which"
  }, 
  "lazyload": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "y 12", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://w3c.github.io/web-performance/specs/ResourcePriorities/Overview.html"
  }, 
  "let": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 49", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 44", 
    "Firefox for Android": "y 60", 
    "IE": "a 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 36", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/6.0/#sec-let-and-const-declarations"
  }, 
  "link-icon-png": {
   "notes": "Win8/IE10+ and iOS Safari support other types of icons for webpages too, using alternate tags.\r\n\r\nSee also [SVG favicons](#feat=link-icon-svg).", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 9", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/semantics.html#rel-icon"
  }, 
  "link-icon-svg": {
   "notes": "See also [PNG favicons](#feat=link-icon-png).", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 68", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "y 41", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 44", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "a 9", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "a 9.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/semantics.html#rel-icon"
  }, 
  "link-rel-dns-prefetch": {
   "notes": "", 
   "support": {
    "Android Browser": "u 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "u 10", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "u 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "u 11.8", 
    "iOS Safari": "u 12"
   }, 
   "url": "https://www.w3.org/TR/resource-hints/#dns-prefetch"
  }, 
  "link-rel-preconnect": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 46", 
    "Chrome for Android": "y 67", 
    "Edge": "a 15", 
    "Firefox": "y 39", 
    "Firefox for Android": "u 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 33", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "u 11.8", 
    "iOS Safari": "y 11.3"
   }, 
   "url": "https://www.w3.org/TR/resource-hints/#preconnect"
  }, 
  "link-rel-prefetch": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 8", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/resource-hints/#dfn-prefetch"
  }, 
  "link-rel-preload": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 50", 
    "Chrome for Android": "y 67", 
    "Edge": "a 17", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 37", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.3"
   }, 
   "url": "https://w3c.github.io/preload/"
  }, 
  "link-rel-prerender": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 13", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/resource-hints/#prerender"
  }, 
  "localecompare": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 24", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 29", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 15", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-402/2.0/#sec-13.1.1"
  }, 
  "magnetometer": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 67", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/magnetometer/"
  }, 
  "matchesselector": {
   "notes": "Partial support refers to supporting the older specification's \"matchesSelector\" name rather than just \"matches\".", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 34", 
    "Chrome for Android": "y 67", 
    "Edge": "y 15", 
    "Firefox": "y 34", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 21", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 8"
   }, 
   "url": "https://dom.spec.whatwg.org/#dom-element-matches"
  }, 
  "matchmedia": {
   "notes": "", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 9", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 6", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 12.1", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://www.w3.org/TR/cssom-view/#dom-window-matchmedia"
  }, 
  "mathml": {
   "notes": "Opera's support is limited to a CSS profile of MathML. Support was added in Chrome 24, but removed afterwards due to instability.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://www.w3.org/TR/MathML/"
  }, 
  "maxlength": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "a all", 
    "Opera Mobile": "a 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#attr-input-maxlength"
  }, 
  "media-fragments": {
   "notes": "", 
   "support": {
    "Android Browser": "a 4.4", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "a 18", 
    "Chrome for Android": "a 67", 
    "Edge": "n 18", 
    "Firefox": "a 34", 
    "Firefox for Android": "a 60", 
    "IE": "n 11", 
    "IE Mobile": "a 10", 
    "Opera": "a 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "a 6", 
    "Samsung Internet": "a 6.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "a 8"
   }, 
   "url": "https://www.w3.org/TR/media-frags/"
  }, 
  "mediacapture-fromelement": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 62", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "a 43", 
    "Firefox for Android": "a 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 48", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "a 11", 
    "Samsung Internet": "a 5", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://w3c.github.io/mediacapture-fromelement/"
  }, 
  "mediarecorder": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 49", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 29", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 36", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://w3c.github.io/mediacapture-record/MediaRecorder.html"
  }, 
  "mediasource": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 31", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 42", 
    "Firefox for Android": "y 60", 
    "IE": "a 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 8", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/media-source/"
  }, 
  "menu": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "a 8", 
    "Firefox for Android": "a 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/2016/REC-html51-20161101/interactive-elements.html#context-menus"
  }, 
  "meta-theme-color": {
   "notes": "Also supported in the (now discontinued) Firefox OS, but not Firefox for other OSes.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "y 67", 
    "Edge": "n 17", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/semantics.html#meta-theme-color"
  }, 
  "meter": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 8", 
    "Chrome for Android": "y 67", 
    "Edge": "y 13", 
    "Firefox": "y 16", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 11", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#the-meter-element"
  }, 
  "midi": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 43", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 30", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "http://webaudio.github.io/web-midi-api/"
  }, 
  "minmaxwh": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 7", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/CSS21/visudet.html#min-max-widths"
  }, 
  "mp3": {
   "notes": "Support refers to this format's use in the `audio` element, not other conditions.", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 22", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "http://mpgedit.org/mpgedit/mpeg_format/MP3Format.html"
  }, 
  "mpeg-dash": {
   "notes": "DASH can be used with a JavaScript library in browsers that doesn't support it natively as long as they support [Media Source Extensions](/#feat=mediasource).", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "y 12", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.iso.org/standard/65274.html"
  }, 
  "mpeg4": {
   "notes": "Firefox supports H.264 on Windows 7 and later since version 21. Firefox supports H.264 on Linux since version 26 if the appropriate gstreamer plug-ins are installed.\r\n\r\nPartial support for older Firefox versions refers to the lack of support in OS X & some non-Android Linux platforms.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 35", 
    "Firefox for Android": "a 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 25", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.2", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "http://ip.hhi.de/imagecom_G1/assets/pdfs/csvt_overview_0305.pdf"
  }, 
  "multibackgrounds": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.6", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/css3-background/"
  }, 
  "multicolumn": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 50", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "a 52", 
    "Firefox for Android": "a 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 37", 
    "Opera Mini": "y all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.w3.org/TR/css3-multicol/"
  }, 
  "mutation-events": {
   "notes": "See also support for [Mutation Observer](https://caniuse.com/#feat=mutationobserver), which replaces mutation events and does not have the same performance drawbacks.", 
   "support": {
    "Android Browser": "a 2.3", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "a 15", 
    "Chrome for Android": "a 67", 
    "Edge": "a 12", 
    "Firefox": "a 6", 
    "Firefox for Android": "a 60", 
    "IE": "a 9", 
    "IE Mobile": "a 10", 
    "Opera": "a 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "a 4", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "a 4.2"
   }, 
   "url": "https://www.w3.org/TR/DOM-Level-3-Events/#legacy-mutationevent-events"
  }, 
  "mutationobserver": {
   "notes": "When changing the `innerHTML` content of a node containing a single `CharacterData` node, resulting in a single-but-different `CharacterData` child node, WebKit browsers consider this a `characterData` mutation of the child `CharacterData` node, while other browsers consider it a `childList` mutation of the parent node.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 27", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 14", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://dom.spec.whatwg.org/#mutation-observers"
  }, 
  "namevalue-storage": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 8", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/webstorage.html#storage"
  }, 
  "nav-timing": {
   "notes": "Removed in iOS 8.1 due to poor performance.", 
   "support": {
    "Android Browser": "y 4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 13", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 7", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 8", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.w3.org/TR/navigation-timing/"
  }, 
  "netinfo": {
   "notes": "In Chrome the API is enabled on Android only, support for other platforms [is coming](https://docs.google.com/a/chromium.org/document/d/1LTk9uVMGi4kurzcF5ellsAJReTF31fFJMHrQwSVtBjc/) . Support is also available on [Firefox OS](https://bugzilla.mozilla.org/show_bug.cgi?id=960426).", 
   "support": {
    "Android Browser": "a 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "a 61", 
    "Chrome for Android": "a 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "a 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "a 48", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "http://wicg.github.io/netinfo/"
  }, 
  "notifications": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 22", 
    "Chrome for Android": "n 67", 
    "Edge": "y 14", 
    "Firefox": "y 22", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 25", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://notifications.spec.whatwg.org/"
  }, 
  "object-fit": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 31", 
    "Chrome for Android": "y 67", 
    "Edge": "a 16", 
    "Firefox": "y 36", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 19", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.w3.org/TR/css3-images/"
  }, 
  "object-observe": {
   "notes": "Support in Blink-based browsers is expected to be removed in future versions.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "http://wiki.ecmascript.org/doku.php?id=harmony:observe"
  }, 
  "object-values": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 54", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 47", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 41", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/8.0/#sec-object.values"
  }, 
  "objectrtc": {
   "notes": "ORTC is often dubbed WebRTC 1.1. It is possible to make ORTC communicate with WebRTC 1.0 endpoints. See [WebRTC 1.0](https://caniuse.com/#feat=rtcpeerconnection) for support details for that API.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "y 13", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/community/ortc/"
  }, 
  "offline-apps": {
   "notes": "This technology is being deprecated in favor of [Service Workers](https://caniuse.com/#feat=serviceworkers)", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.6", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/browsers.html#offline"
  }, 
  "offscreencanvas": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 69", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/canvas.html#the-offscreencanvas-interface"
  }, 
  "ogg-vorbis": {
   "notes": "Support refers to this format's use in the `audio` element, not other conditions.", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 10.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "http://www.xiph.org/vorbis/doc/Vorbis_I_spec.html"
  }, 
  "ogv": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 4", 
    "Chrome for Android": "n 67", 
    "Edge": "y 17", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 10.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "http://theora.org/doc/"
  }, 
  "ol-reversed": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 20", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 18", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 12.1", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/semantics.html#attr-ol-reversed"
  }, 
  "once-event-listener": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 55", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 50", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 42", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://dom.spec.whatwg.org/#dom-addeventlisteneroptions-once"
  }, 
  "online-status": {
   "notes": "\"online\" does not always mean connection to the internet, it can also just mean connection to some network.\r\n\r\nEarly versions of Chrome and Safari always reported \"true\" for `navigator.onLine`", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 14", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 41", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/browsers.html#browser-state"
  }, 
  "opus": {
   "notes": "Support refers to this format's use in the `audio` element, not other conditions.\r\n\r\nFor Opera the Linux version may be able to play it when the GStreamer module is up to date and the served mime-type is 'audio/ogg'.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 33", 
    "Chrome for Android": "y 67", 
    "Edge": "y 14", 
    "Firefox": "y 15", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 20", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://tools.ietf.org/html/rfc6716"
  }, 
  "orientation-sensor": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 67", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/orientation-sensor/"
  }, 
  "outline": {
   "notes": "Firefox also supports the non-standard `-moz-outline-radius` property that acts similar to `border-radius`.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 15", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "a 8", 
    "IE Mobile": "a 10", 
    "Opera": "y 11.6", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://drafts.csswg.org/css-ui/"
  }, 
  "pad-start-end": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 57", 
    "Chrome for Android": "y 67", 
    "Edge": "y 15", 
    "Firefox": "y 48", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 44", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/8.0/index.html#sec-string.prototype.padend"
  }, 
  "page-transition-events": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/indices.html#event-pageshow"
  }, 
  "pagevisibility": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 33", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 18", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 20", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://www.w3.org/TR/page-visibility/"
  }, 
  "passive-event-listener": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 51", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 49", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 38", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://dom.spec.whatwg.org/#dom-addeventlisteneroptions-passive"
  }, 
  "path2d": {
   "notes": "", 
   "support": {
    "Android Browser": "a 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 68", 
    "Chrome for Android": "a 67", 
    "Edge": "a 14", 
    "Firefox": "y 48", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "a 23", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/canvas.html#path2d-objects"
  }, 
  "payment-request": {
   "notes": "Apple provides an equivalent proprietary API called [Apple Pay JS](https://developer.apple.com/reference/applepayjs/). Google provides a [PaymentRequest wrapper for Apple Pay JS](https://github.com/GoogleChrome/appr-wrapper).", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 61", 
    "Chrome for Android": "y 67", 
    "Edge": "y 15", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 48", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.3"
   }, 
   "url": "https://www.w3.org/TR/payment-request/"
  }, 
  "permissions-api": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 43", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 46", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 30", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://w3c.github.io/permissions/"
  }, 
  "picture": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 38", 
    "Chrome for Android": "y 67", 
    "Edge": "y 13", 
    "Firefox": "y 38", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 25", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.3"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/embedded-content.html#the-picture-element"
  }, 
  "ping": {
   "notes": "While still in the WHATWG specification, this feature was removed from the W3C HTML5 specification in 2010.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 15", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/semantics.html#ping"
  }, 
  "png-alpha": {
   "notes": "IE6 does support full transparency in 8-bit PNGs, which can sometimes be an alternative to 24-bit PNGs.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 7", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/PNG/"
  }, 
  "pointer": {
   "notes": "Firefox, starting with version 28, provides the 'dom.w3c_pointer_events.enabled' flag to support this specification.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 55", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 59", 
    "Firefox for Android": "n 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 42", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/pointerevents/"
  }, 
  "pointer-events": {
   "notes": "Already part of the SVG specification, and all SVG-supporting browsers appear to support the property on SVG elements.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.6", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "http://wiki.csswg.org/spec/css4-ui#pointer-events"
  }, 
  "pointerlock": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 37", 
    "Chrome for Android": "n 67", 
    "Edge": "y 13", 
    "Firefox": "y 41", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 24", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://www.w3.org/TR/pointerlock/"
  }, 
  "prefers-reduced-motion": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "a 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://drafts.csswg.org/mediaqueries-5/#prefers-reduced-motion"
  }, 
  "progress": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 8", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 6", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 11", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "a 7.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#the-progress-element"
  }, 
  "promises": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 33", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 29", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 20", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 8"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/6.0/#sec-promise-objects"
  }, 
  "proximity": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "y 15", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/proximity/"
  }, 
  "proxy": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 49", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 18", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 36", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/6.0/#sec-proxy-object-internal-methods-and-internal-slots"
  }, 
  "publickeypinning": {
   "notes": "The HTTP header syntax is 'Public-Key-Pins: pin-sha256=\"base64==\"; max-age=expireTime [; includeSubdomains][; report-uri=\"reportURI\"]'.\r\n\r\nWill be deprecated and removed from Chrome as of Chrome 69.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 35", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 25", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://tools.ietf.org/html/rfc7469"
  }, 
  "push-api": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 50", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "y 44", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 42", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://w3c.github.io/push-api/"
  }, 
  "queryselector": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.0", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://dom.spec.whatwg.org/#dom-parentnode-queryselector"
  }, 
  "readonly-attr": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 26", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 6", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/forms.html#attr-input-readonly"
  }, 
  "referrer-policy": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 61", 
    "Chrome for Android": "y 67", 
    "Edge": "a 12", 
    "Firefox": "y 36", 
    "Firefox for Android": "y 60", 
    "IE": "a 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "a 8"
   }, 
   "url": "http://w3c.github.io/webappsec/specs/referrer-policy/"
  }, 
  "registerprotocolhandler": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 13", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "y 3", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 11.6", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/webappapis.html#custom-handlers"
  }, 
  "rel-noopener": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 49", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 52", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 36", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/semantics.html#link-type-noopener"
  }, 
  "rel-noreferrer": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 16", 
    "Chrome for Android": "y 67", 
    "Edge": "y 13", 
    "Firefox": "y 33", 
    "Firefox for Android": "y 60", 
    "IE": "a 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/semantics.html#link-type-noreferrer"
  }, 
  "rellist": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 65", 
    "Chrome for Android": "y 67", 
    "Edge": "y 18", 
    "Firefox": "y 30", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 52", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "a 5", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/semantics.html#dom-a-rellist"
  }, 
  "rem": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.6", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 10", 
    "Opera": "y 11.6", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://www.w3.org/TR/css3-values/#font-relative-lengths"
  }, 
  "requestanimationframe": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 24", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 23", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/webappapis.html#animation-frames"
  }, 
  "requestidlecallback": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 47", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 55", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 34", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://w3c.github.io/requestidlecallback/"
  }, 
  "resizeobserver": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 64", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 52", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://wicg.github.io/ResizeObserver/"
  }, 
  "resource-timing": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 25", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 35", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://www.w3.org/TR/resource-timing/"
  }, 
  "rest-parameters": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 47", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 15", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 34", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/6.0/#sec-function-definitions"
  }, 
  "rtcpeerconnection": {
   "notes": "Microsoft also offers a compatible implementation known as [ObjectRTC](http://blogs.msdn.com/b/ie/archive/2014/10/27/bringing-interoperable-real-time-communications-to-the-web.aspx). See [Object RTC](https://caniuse.com/#feat=objectrtc) for support details for that API.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 56", 
    "Chrome for Android": "y 67", 
    "Edge": "a 15", 
    "Firefox": "y 44", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 43", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://w3c.github.io/webrtc-pc/"
  }, 
  "ruby": {
   "notes": "Browsers without native support can still simulate support using CSS. Partial support refers to only supporting basic ruby, may still be missing writing-mode, Complex ruby and CSS3 Ruby.", 
   "support": {
    "Android Browser": "a 3", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 10", 
    "Chrome": "a 5", 
    "Chrome for Android": "a 67", 
    "Edge": "a 12", 
    "Firefox": "y 38", 
    "Firefox for Android": "y 60", 
    "IE": "a 5.5", 
    "IE Mobile": "a 10", 
    "Opera": "a 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "a 5", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "a 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/semantics.html#the-ruby-element"
  }, 
  "run-in": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "y 8", 
    "IE Mobile": "y 10", 
    "Opera": "n 53", 
    "Opera Mini": "y all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.csswg.org/css-display/#valdef-display-run-in"
  }, 
  "same-site-cookie-attribute": {
   "notes": "This feature is backwards compatible. Browsers not supporting this feature will simply use the cookie as a regular cookie. There is no need to deliver different cookies to clients.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 51", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 60", 
    "Firefox for Android": "y 60", 
    "IE": "a 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 39", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 12", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 12"
   }, 
   "url": "https://tools.ietf.org/html/draft-west-first-party-cookies-06"
  }, 
  "screen-orientation": {
   "notes": "Partial support refers to an [older version](https://www.w3.org/TR/2014/WD-screen-orientation-20140220/) of the draft specification, and the spec has undergone significant changes since, for example renaming the `screen.lockOrientation` method to `screen.orientation.lock`.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 38", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 44", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 25", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/screen-orientation/"
  }, 
  "script-async": {
   "notes": "", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 8", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.6", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-async"
  }, 
  "script-defer": {
   "notes": "", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 8", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/scripting.html#attr-script-defer"
  }, 
  "scrollintoview": {
   "notes": "", 
   "support": {
    "Android Browser": "a 2.3", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 61", 
    "Chrome for Android": "y 67", 
    "Edge": "a 12", 
    "Firefox": "y 36", 
    "Firefox for Android": "y 60", 
    "IE": "a 8", 
    "IE Mobile": "a 10", 
    "Opera": "y 48", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 10", 
    "QQ Browser": "a 1.2", 
    "Safari": "a 5.1", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "a 5.0"
   }, 
   "url": "https://drafts.csswg.org/cssom-view/#dom-element-scrollintoview"
  }, 
  "scrollintoviewifneeded": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 15", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollIntoViewIfNeeded"
  }, 
  "sdch": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://docs.google.com/viewer?a=v&pid=forums&srcid=MDIwOTgxNDMwMTgyMjkzMTI2ODcBMDQ2MzU5NDU2MDA0MTg5NDE1MTkBTDZmaENoSG9BZ0FKATAuMQEBdjI"
  }, 
  "selection-api": {
   "notes": "See also support for the related [DOM range](https://caniuse.com/#feat=dom-range) ", 
   "support": {
    "Android Browser": "y 4.2", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 15", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 52", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "a 5.0"
   }, 
   "url": "https://www.w3.org/TR/selection-api/"
  }, 
  "serviceworkers": {
   "notes": "Details on partial support can be found on [is ServiceWorker Ready?](https://jakearchibald.github.io/isserviceworkerready/)", 
   "support": {
    "Android Browser": "a 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 45", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "y 44", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 32", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 11.3"
   }, 
   "url": "https://slightlyoff.github.io/ServiceWorker/spec/service_worker/"
  }, 
  "setimmediate": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "y 12", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "http://w3c.github.io/setImmediate/"
  }, 
  "shadowdom": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 35", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 22", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/shadow-dom/"
  }, 
  "shadowdomv1": {
   "notes": "Shadow DOM v0 was implemented in Chrome/Opera but other browser vendors are implementing v1.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 53", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 40", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "a 10", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "a 10.0"
   }, 
   "url": "https://www.w3.org/TR/shadow-dom/"
  }, 
  "sharedarraybuffer": {
   "notes": "", 
   "support": {
    "Android Browser": "n 4.4.3", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 68", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://tc39.github.io/ecmascript_sharedmem/shmem.html"
  }, 
  "sharedworkers": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "y 29", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 10.6", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/workers.html#shared-workers-introduction"
  }, 
  "sni": {
   "notes": "", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 6", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://tools.ietf.org/html/rfc6066"
  }, 
  "spdy": {
   "notes": "See also support for [HTTP2](https://caniuse.com/#feat=http2), successor of SPDY.\r\n\r\nChrome will be removing support in 2016 (in favor of HTTP2), other browsers likely to follow.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "u 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 8", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 8"
   }, 
   "url": "http://http2.github.io/http2-spec/index.html"
  }, 
  "speech-recognition": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://w3c.github.io/speech-api/speechapi.html#speechreco-section"
  }, 
  "speech-synthesis": {
   "notes": "Samsung Internet for GearVR: In Development, release based on Chromium m53 due Q1/2017", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 33", 
    "Chrome for Android": "y 67", 
    "Edge": "y 14", 
    "Firefox": "y 49", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 27", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://w3c.github.io/speech-api/speechapi.html#tts-section"
  }, 
  "spellcheck-attribute": {
   "notes": "The partial support in mobile browsers results from their OS generally having built-in spell checking instead of using the wavy underline to indicate misspelled words. `spellcheck=\"false\"` does not seem to have any effect in these browsers.\r\n\r\nBrowsers have different behavior in how they deal with spellchecking in combination with the the `lang` attribute. Generally spelling is based on the browser's language, not the language of the document.", 
   "support": {
    "Android Browser": "a 2.1", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 9", 
    "Chrome for Android": "a 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "a 60", 
    "IE": "y 10", 
    "IE Mobile": "a 10", 
    "Opera": "y 10.5", 
    "Opera Mini": "a all", 
    "Opera Mobile": "a 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "a 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/interaction.html#spelling-and-grammar-checking"
  }, 
  "sql-storage": {
   "notes": "The Web SQL Database specification is no longer being maintained and support may be dropped in future versions.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 10.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/webdatabase/"
  }, 
  "srcset": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 38", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 38", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 25", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/embedded-content.html#attr-img-srcset"
  }, 
  "stream": {
   "notes": "As of Chrome 47, the getUserMedia API cannot be called from insecure origins.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 53", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 36", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 40", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://www.w3.org/TR/mediacapture-streams/"
  }, 
  "streams": {
   "notes": "", 
   "support": {
    "Android Browser": "a 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "a 52", 
    "Chrome for Android": "a 67", 
    "Edge": "a 14", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "a 39", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "a 10", 
    "Samsung Internet": "a 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "a 10.3"
   }, 
   "url": "https://streams.spec.whatwg.org/"
  }, 
  "stricttransportsecurity": {
   "notes": "The HTTP header is 'Strict-Transport-Security'.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 12", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://tools.ietf.org/html/rfc6797"
  }, 
  "style-scoped": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/html51/document-metadata.html#element-attrdef-style-scoped"
  }, 
  "subresource-integrity": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 45", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "y 43", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 32", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/SRI/"
  }, 
  "svg": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.2", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/SVG/"
  }, 
  "svg-css": {
   "notes": "", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 5", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 24", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.2"
   }, 
   "url": "https://www.w3.org/TR/css3-background/#background-image"
  }, 
  "svg-filters": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 8", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://www.w3.org/TR/SVG/filters.html"
  }, 
  "svg-fonts": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.2", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/SVG/fonts.html"
  }, 
  "svg-fragment": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 10", 
    "Chrome": "y 50", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 15", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 37", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "a 1.2", 
    "Safari": "y 11.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 11.3"
   }, 
   "url": "https://www.w3.org/TR/SVG/linking.html#SVGFragmentIdentifiers"
  }, 
  "svg-html": {
   "notes": "Partial support refers to lack of filter support or buggy result from effects. A [CSS Filter Effects](https://www.w3.org/TR/filter-effects/) specification is in the works that would replace this method.", 
   "support": {
    "Android Browser": "a 4.4", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "a 4", 
    "Chrome for Android": "a 67", 
    "Edge": "a 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "a 9", 
    "IE Mobile": "n 11", 
    "Opera": "a 9", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 10", 
    "QQ Browser": "a 1.2", 
    "Safari": "a 4", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "a 3.2"
   }, 
   "url": "https://www.w3.org/TR/SVG11/extend.html#ForeignObjectElement"
  }, 
  "svg-html5": {
   "notes": "", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 7", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 11.6", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/embedded-content.html#svg-0"
  }, 
  "svg-img": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 28", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/embedded-content.html"
  }, 
  "svg-smil": {
   "notes": "", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 5", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 9", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://www.w3.org/TR/SVG/animate.html"
  }, 
  "tabindex-attr": {
   "notes": "Mac OS X \"Full Keyboard Access\" refers to setting Keyboard→Shortcuts→Full Keyboard Access to \"All controls\" in the System Preferences.\r\n\r\n\"Unknown\" support for mobile browsers is due to lacking a method of tabbing through fields.", 
   "support": {
    "Android Browser": "u 67", 
    "Baidu Browser": "u 7.12", 
    "Blackberry Browser": "u 10", 
    "Chrome": "y 15", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 7", 
    "IE Mobile": "u 11", 
    "Opera": "y 9.5", 
    "Opera Mini": "u all", 
    "Opera Mobile": "u 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "u 7.2", 
    "UC Browser for Android": "u 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/interaction.html#attr-tabindex"
  }, 
  "template": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 35", 
    "Chrome for Android": "y 67", 
    "Edge": "y 15", 
    "Firefox": "y 22", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 22", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/scripting.html#the-template-element"
  }, 
  "template-literals": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 41", 
    "Chrome for Android": "y 67", 
    "Edge": "y 13", 
    "Firefox": "y 34", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 29", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/6.0/#sec-template-literals"
  }, 
  "text-decoration": {
   "notes": "All browsers support the CSS2 version of `text-decoration`, which matches only the `text-decoration-line` values (`underline`, etc.)", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "a 57", 
    "Chrome for Android": "a 67", 
    "Edge": "n 18", 
    "Firefox": "a 36", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "a 44", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "a 7.2", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/css-text-decor-3/#line-decoration"
  }, 
  "text-emphasis": {
   "notes": "Some old WebKit browsers (like Chrome 24) support `-webkit-text-emphasis`, but does not support CJK languages and is therefore considered unsupported.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "y 46", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 7.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://drafts.csswg.org/css-text-decor-3/#text-emphasis-property"
  }, 
  "text-overflow": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 7", 
    "Firefox for Android": "y 60", 
    "IE": "y 6", 
    "IE Mobile": "y 10", 
    "Opera": "y 11", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/css3-ui/#text-overflow"
  }, 
  "text-size-adjust": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 54", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 45", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.csswg.org/css-size-adjust/"
  }, 
  "text-stroke": {
   "notes": "Does not yet appear in any W3C specification. Was briefly included in a spec as the \"text-outline\" property, but this was removed.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://compat.spec.whatwg.org/#text-fill-and-stroking"
  }, 
  "textcontent": {
   "notes": "`Node.textContent` is somewhat similar to, but has important differences from, [`Node.innerText`](https://caniuse.com/#feat=innertext).", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.2", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.0"
   }, 
   "url": "https://dom.spec.whatwg.org/#dom-node-textcontent"
  }, 
  "textencoder": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 38", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 20", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 25", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://encoding.spec.whatwg.org/#api"
  }, 
  "tls1-1": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 22", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 24", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 12.1", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://tools.ietf.org/html/rfc4346"
  }, 
  "tls1-2": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 30", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 27", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 17", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://tools.ietf.org/html/rfc5246"
  }, 
  "tls1-3": {
   "notes": "", 
   "support": {
    "Android Browser": "n 4.4.3", 
    "Baidu Browser": "u 7.12", 
    "Blackberry Browser": "n 7", 
    "Chrome": "y 56", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 53", 
    "Firefox for Android": "u 60", 
    "IE": "n 11", 
    "IE Mobile": "n 10", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 12.1", 
    "QQ Browser": "u 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "u 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://tools.ietf.org/html/draft-ietf-tls-tls13-21"
  }, 
  "touch": {
   "notes": "Internet Explorer implements Pointer Events specification which supports more input devices than Touch Events one.\r\n\r\nThere is a library on GitHub that is working toward bringing W3C touch events to IE 10 and 11: https://github.com/CamHenlin/TouchPolyfill \r\n\r\nRemoved support in Firefox refers to desktop Firefox only.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 22", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 52", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "a 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://www.w3.org/TR/touch-events/"
  }, 
  "transforms2d": {
   "notes": "The scale transform can be emulated in IE < 9 using Microsoft's \"zoom\" extension, others are (not easily) possible using the MS Matrix filter", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 36", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 16", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 23", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.w3.org/TR/css3-2d-transforms/"
  }, 
  "transforms3d": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 36", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 16", 
    "Firefox for Android": "y 60", 
    "IE": "a 10", 
    "IE Mobile": "a 10", 
    "Opera": "y 23", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.w3.org/TR/css3-3d-transforms/"
  }, 
  "ttf": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.2", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "a 9", 
    "IE Mobile": "a 10", 
    "Opera": "y 10.0", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 4.2"
   }, 
   "url": "http://developer.apple.com/fonts/TTRefMan/index.html"
  }, 
  "typedarrays": {
   "notes": "Includes support for ArrayBuffer objects.", 
   "support": {
    "Android Browser": "y 4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 7", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "a 10", 
    "Opera": "y 11.6", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/6.0/#sec-typedarray-objects"
  }, 
  "u2f": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 41", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 42", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://fidoalliance.org/specs/fido-u2f-v1.0-nfc-bt-amendment-20150514/fido-u2f-javascript-api.html"
  }, 
  "unhandledrejection": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 49", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 36", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 10.3"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/webappapis.html#unhandled-promise-rejections:event-unhandledrejection"
  }, 
  "upgradeinsecurerequests": {
   "notes": "The HTTP header is `Content-Security-Policy: upgrade-insecure-requests`. Alternatively, the HTML tag is `<meta http-equiv=\"Content-Security-Policy\" content=\"upgrade-insecure-requests\">`.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 43", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "y 42", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 30", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://www.w3.org/TR/upgrade-insecure-requests/"
  }, 
  "url": {
   "notes": "See also [URLSearchParams](#feat=urlsearchparams).", 
   "support": {
    "Android Browser": "y 4.4.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 32", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 26", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 19", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 8"
   }, 
   "url": "https://url.spec.whatwg.org/#api"
  }, 
  "urlsearchparams": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 49", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "y 44", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 36", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 10.1", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 10.3"
   }, 
   "url": "https://url.spec.whatwg.org/#urlsearchparams"
  }, 
  "use-strict": {
   "notes": "", 
   "support": {
    "Android Browser": "y 3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 13", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 11.6", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 11.5", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://www.ecma-international.org/ecma-262/5.1/#sec-14.1"
  }, 
  "user-select-none": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 54", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 41", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://drafts.csswg.org/css-ui-4/#valdef-user-select-none"
  }, 
  "user-timing": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 25", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 38", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://www.w3.org/TR/user-timing/"
  }, 
  "variable-fonts": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 66", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "y 62", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://drafts.csswg.org/css-fonts-4/#font-variation-settings-def"
  }, 
  "vibration": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 30", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 16", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 17", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/vibration/"
  }, 
  "video": {
   "notes": "Different browsers have support for different video formats, see sub-features for details.\r\n\r\n", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 20", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/embedded-content.html#the-video-element"
  }, 
  "videotracks": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "y 12", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/embedded-content.html#audiotracklist-and-videotracklist-objects"
  }, 
  "viewport-units": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 26", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 19", 
    "Firefox for Android": "y 60", 
    "IE": "a 9", 
    "IE Mobile": "a 10", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 8"
   }, 
   "url": "https://www.w3.org/TR/css3-values/#viewport-relative-lengths"
  }, 
  "wai-aria": {
   "notes": "Support for ARIA is rather complex and currently is not fully supported in any browser. For detailed information on partial support see the [ARIA 1.0 Implementation Report](https://www.w3.org/WAI/ARIA/1.0/CR/implementation-report)\r\n", 
   "support": {
    "Android Browser": "a 4.4", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "a 4", 
    "Chrome for Android": "a 67", 
    "Edge": "a 12", 
    "Firefox": "a 2", 
    "Firefox for Android": "a 60", 
    "IE": "a 8", 
    "IE Mobile": "a 10", 
    "Opera": "a 9.5", 
    "Opera Mini": "a all", 
    "Opera Mobile": "a 10", 
    "QQ Browser": "a 1.2", 
    "Safari": "a 4", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "a 3.2"
   }, 
   "url": "https://www.w3.org/TR/wai-aria/"
  }, 
  "wasm": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 57", 
    "Chrome for Android": "y 67", 
    "Edge": "y 16", 
    "Firefox": "y 52", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 44", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "y 11", 
    "Samsung Internet": "y 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 11.0"
   }, 
   "url": "https://github.com/WebAssembly/spec"
  }, 
  "wav": {
   "notes": "Support refers to this format's use in the `audio` element, not other conditions.", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 8", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 10.5", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "http://www-mmsp.ece.mcgill.ca/documents/AudioFormats/WAVE/WAVE.html"
  }, 
  "wbr-element": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 9.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.2", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/semantics.html#the-wbr-element"
  }, 
  "web-animation": {
   "notes": "", 
   "support": {
    "Android Browser": "a 67", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "a 36", 
    "Chrome for Android": "a 67", 
    "Edge": "n 18", 
    "Firefox": "a 47", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "a 23", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "y TP", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "http://w3c.github.io/web-animations/"
  }, 
  "web-app-manifest": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "a 39", 
    "Chrome for Android": "y 67", 
    "Edge": "y 17", 
    "Firefox": "n 63", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 11.3"
   }, 
   "url": "https://www.w3.org/TR/appmanifest/"
  }, 
  "web-bluetooth": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 56", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 43", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 6.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "http://webbluetoothcg.github.io/web-bluetooth/"
  }, 
  "web-share": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "u 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://wicg.github.io/web-share/"
  }, 
  "webauthn": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 67", 
    "Chrome for Android": "n 67", 
    "Edge": "y 18", 
    "Firefox": "y 60", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n 11.1", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://w3c.github.io/webauthn/"
  }, 
  "webgl": {
   "notes": "WebGL support is dependent on GPU support and may not be available on older devices. This is due to the additional requirement for users to have [up to date video drivers](http://www.khronos.org/webgl/wiki/BlacklistsAndWhitelists).\r\n\r\nNote that WebGL is part of the [Khronos Group](http://www.khronos.org/webgl/), not the W3C.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 8", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 4", 
    "Firefox for Android": "y 60", 
    "IE": "y 11", 
    "IE Mobile": "y 11", 
    "Opera": "y 12", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 8"
   }, 
   "url": "https://www.khronos.org/registry/webgl/specs/1.0/"
  }, 
  "webgl2": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 56", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 51", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 43", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.khronos.org/registry/webgl/specs/latest/2.0/"
  }, 
  "webm": {
   "notes": "Will work in IE9+ and Safari/MacOSX provided the user has the WebM codecs installed. Partial support indicates that at least one codec is supported but not all. MS Edge supports VP9 from MSE sources, also progressive sources are not supported by Edge.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 25", 
    "Chrome for Android": "y 67", 
    "Edge": "a 14", 
    "Firefox": "y 28", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 16", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 5", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.webmproject.org"
  }, 
  "webp": {
   "notes": "Both [Safari](https://www.cnet.com/news/apple-ios-macos-tests-googles-webp-graphics-to-speed-up-web/) & [Firefox](https://bugzilla.mozilla.org/show_bug.cgi?id=1294490) are experimenting with supporting WebP images.\r\n\r\nAnimated WebP images are supported in Chrome 32+ and Opera 19+.", 
   "support": {
    "Android Browser": "y 4.2", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 23", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 12", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 11.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://developers.google.com/speed/webp/"
  }, 
  "websockets": {
   "notes": "Reported to be supported in some Android 4.x browsers, including Sony Xperia S, Sony TX and HTC.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 16", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 11", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 12.1", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12.1", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 6.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/comms.html#network"
  }, 
  "webusb": {
   "notes": "", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 61", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 48", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://wicg.github.io/webusb/"
  }, 
  "webvr": {
   "notes": "Not every computer or smartphone could run WebVR appication. For smartphones, you need a gyroscope and for computers must be VR-ready also the needed sotfware (Oculus client or (Steam VR and VivePort)) and drivers must been installed on the computer. In this situations, you've the best experiance to use WebVR applications.", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "y 67", 
    "Edge": "y 15", 
    "Firefox": "y 55", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "a 5", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://w3c.github.io/webvr/"
  }, 
  "webvtt": {
   "notes": "WebVTT must be used with the <track> element.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 18", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 31", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 11", 
    "Opera": "y 15", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://w3c.github.io/webvtt/"
  }, 
  "webworkers": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.5", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 10.6", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/workers.html"
  }, 
  "will-change": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 36", 
    "Chrome for Android": "y 67", 
    "Edge": "n 18", 
    "Firefox": "y 36", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 24", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 9.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 9.3"
   }, 
   "url": "https://drafts.csswg.org/css-will-change/"
  }, 
  "woff": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 5", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3.6", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 11.1", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 11", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 5.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 5.0"
   }, 
   "url": "https://www.w3.org/TR/WOFF/"
  }, 
  "woff2": {
   "notes": "", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "y 36", 
    "Chrome for Android": "y 67", 
    "Edge": "y 14", 
    "Firefox": "y 39", 
    "Firefox for Android": "y 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "y 23", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 12", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "y 10.0"
   }, 
   "url": "https://www.w3.org/TR/WOFF2/"
  }, 
  "word-break": {
   "notes": "Partial support refers to supporting the `break-all` value, but not the `keep-all` value.\r\n\r\nChrome, Safari and other WebKit/Blink browsers also support the unofficial `break-word` value which is treated like `word-wrap: break-word`.", 
   "support": {
    "Android Browser": "y 67", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 44", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 15", 
    "Firefox for Android": "y 60", 
    "IE": "y 5.5", 
    "IE Mobile": "y 10", 
    "Opera": "y 31", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 46", 
    "QQ Browser": "a 1.2", 
    "Safari": "y 9", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "y 9.0"
   }, 
   "url": "https://www.w3.org/TR/css3-text/#word-break"
  }, 
  "wordwrap": {
   "notes": "Partial support refers to requiring the legacy name \"word-wrap\" (rather than \"overflow-wrap\") to work.", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 10", 
    "Chrome": "y 23", 
    "Chrome for Android": "y 67", 
    "Edge": "y 18", 
    "Firefox": "y 49", 
    "Firefox for Android": "y 60", 
    "IE": "a 5.5", 
    "IE Mobile": "a 10", 
    "Opera": "y 12.1", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 6.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 7.0"
   }, 
   "url": "https://www.w3.org/TR/css3-text/#overflow-wrap"
  }, 
  "x-doc-messaging": {
   "notes": "", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 3", 
    "Firefox for Android": "y 60", 
    "IE": "a 8", 
    "IE Mobile": "a 10", 
    "Opera": "y 9.5", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 4", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/comms.html#crossDocumentMessages"
  }, 
  "x-frame-options": {
   "notes": "Partial support refers to not supporting the `ALLOW-FROM` option.\r\nThe `X-Frame-Options` header has been obsoleted by [the `frame-ancestors` directive](https://www.w3.org/TR/CSP2/#directive-frame-ancestors) from Content Security Policy Level 2.", 
   "support": {
    "Android Browser": "a 4", 
    "Baidu Browser": "a 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "a 26", 
    "Chrome for Android": "a 67", 
    "Edge": "y 12", 
    "Firefox": "y 18", 
    "Firefox for Android": "y 60", 
    "IE": "y 8", 
    "IE Mobile": "y 10", 
    "Opera": "a 11.6", 
    "Opera Mini": "n all", 
    "Opera Mobile": "a 12.1", 
    "QQ Browser": "a 1.2", 
    "Safari": "a 5.1", 
    "Samsung Internet": "a 4", 
    "UC Browser for Android": "a 11.8", 
    "iOS Safari": "a 7.0"
   }, 
   "url": "https://tools.ietf.org/html/rfc7034"
  }, 
  "xhr2": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4.3", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 31", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 12", 
    "Firefox for Android": "y 60", 
    "IE": "a 10", 
    "IE Mobile": "a 10", 
    "Opera": "y 18", 
    "Opera Mini": "n all", 
    "Opera Mobile": "y 12", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 8"
   }, 
   "url": "https://xhr.spec.whatwg.org/"
  }, 
  "xhtml": {
   "notes": "The XHTML syntax is very close to HTML, and thus is almost always ([incorrectly](https://developer.mozilla.org/en-US/docs/XHTML#MIME_type_versus_DOCTYPE)) served as text/html on the web.", 
   "support": {
    "Android Browser": "y 2.1", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "y 7", 
    "Chrome": "y 4", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 2", 
    "Firefox for Android": "y 60", 
    "IE": "y 9", 
    "IE Mobile": "y 10", 
    "Opera": "y 9", 
    "Opera Mini": "y all", 
    "Opera Mobile": "y 10", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 3.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 3.2"
   }, 
   "url": "https://html.spec.whatwg.org/multipage/xhtml.html#the-xhtml-syntax"
  }, 
  "xhtmlsmil": {
   "notes": "Internet Explorer supports the W3C proposal HTML+TIME, which is largely the same as XHTML+SMIL", 
   "support": {
    "Android Browser": "n 67", 
    "Baidu Browser": "n 7.12", 
    "Blackberry Browser": "n 10", 
    "Chrome": "n 71", 
    "Chrome for Android": "n 67", 
    "Edge": "n 18", 
    "Firefox": "n 63", 
    "Firefox for Android": "n 60", 
    "IE": "n 11", 
    "IE Mobile": "n 11", 
    "Opera": "n 53", 
    "Opera Mini": "n all", 
    "Opera Mobile": "n 46", 
    "QQ Browser": "n 1.2", 
    "Safari": "n TP", 
    "Samsung Internet": "n 7.2", 
    "UC Browser for Android": "n 11.8", 
    "iOS Safari": "n 12"
   }, 
   "url": "https://www.w3.org/TR/XHTMLplusSMIL/"
  }, 
  "xml-serializer": {
   "notes": "", 
   "support": {
    "Android Browser": "y 4.4", 
    "Baidu Browser": "y 7.12", 
    "Blackberry Browser": "a 7", 
    "Chrome": "y 31", 
    "Chrome for Android": "y 67", 
    "Edge": "y 12", 
    "Firefox": "y 12", 
    "Firefox for Android": "y 60", 
    "IE": "y 10", 
    "IE Mobile": "y 10", 
    "Opera": "y 18", 
    "Opera Mini": "a all", 
    "Opera Mobile": "y 46", 
    "QQ Browser": "y 1.2", 
    "Safari": "y 7.1", 
    "Samsung Internet": "y 4", 
    "UC Browser for Android": "y 11.8", 
    "iOS Safari": "y 8"
   }, 
   "url": "https://www.w3.org/TR/DOM-Parsing/"
  }
 }, 
 "updated": 1533876155
}