{
    "dom-backgroundfetchevent-backgroundfetchevent": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchEvent.json",
            "name": "BackgroundFetchEvent",
            "slug": "API/BackgroundFetchEvent/BackgroundFetchEvent",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchEvent/BackgroundFetchEvent",
            "summary": "The BackgroundFetchEvent() constructor creates a new BackgroundFetchEvent object. This constructor is not typically used as the browser creates these objects itself and provides them to background fetch event callbacks.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchEvent()"
        }
    ],
    "dom-backgroundfetchevent-registration": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchEvent.json",
            "name": "registration",
            "slug": "API/BackgroundFetchEvent/registration",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchEvent/registration",
            "summary": "The registration read-only property of the BackgroundFetchEvent interface returns a BackgroundFetchRegistration object.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchEvent.registration"
        }
    ],
    "background-fetch-event": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchEvent.json",
            "name": "BackgroundFetchEvent",
            "slug": "API/BackgroundFetchEvent",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchEvent",
            "summary": "The BackgroundFetchEvent interface of the Background Fetch API is the event type for background fetch events dispatched on the service worker global scope.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchEvent"
        }
    ],
    "background-fetch-manager-fetch": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchManager.json",
            "name": "fetch",
            "slug": "API/BackgroundFetchManager/fetch",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchManager/fetch",
            "summary": "The fetch() method of the BackgroundFetchManager interface returns a Promise that resolves with a BackgroundFetchRegistration object for a supplied array of URLs and Request objects.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchManager.fetch()"
        }
    ],
    "background-fetch-manager-get": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchManager.json",
            "name": "get",
            "slug": "API/BackgroundFetchManager/get",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchManager/get",
            "summary": "The get() method of the BackgroundFetchManager interface returns a Promise that resolves with the BackgroundFetchRegistration associated with the provided id or undefined if the id is not found.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchManager.get()"
        }
    ],
    "background-fetch-manager-get-ids": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchManager.json",
            "name": "getIds",
            "slug": "API/BackgroundFetchManager/getIds",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchManager/getIds",
            "summary": "The getIds() method of the BackgroundFetchManager interface returns the IDs of all registered background fetches.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchManager.getIds()"
        }
    ],
    "background-fetch-manager": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchManager.json",
            "name": "BackgroundFetchManager",
            "slug": "API/BackgroundFetchManager",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchManager",
            "summary": "The BackgroundFetchManager interface of the Background Fetch API is a map where the keys are background fetch IDs and the values are BackgroundFetchRegistration objects.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchManager"
        }
    ],
    "dom-backgroundfetchrecord-request": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRecord.json",
            "name": "request",
            "slug": "API/BackgroundFetchRecord/request",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRecord/request",
            "summary": "The request read-only property of the BackgroundFetchRecord interface returns the details of the resource to be fetched.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRecord.request"
        }
    ],
    "dom-backgroundfetchrecord-responseready": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRecord.json",
            "name": "responseReady",
            "slug": "API/BackgroundFetchRecord/responseReady",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRecord/responseReady",
            "summary": "The responseReady read-only property of the BackgroundFetchRecord interface returns a Promise that resolves with a Response.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRecord.responseReady"
        }
    ],
    "background-fetch-record-interface": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRecord.json",
            "name": "BackgroundFetchRecord",
            "slug": "API/BackgroundFetchRecord",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRecord",
            "summary": "The BackgroundFetchRecord interface of the Background Fetch API represents an individual request and response.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRecord"
        }
    ],
    "background-fetch-registration-abort": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRegistration.json",
            "name": "abort",
            "slug": "API/BackgroundFetchRegistration/abort",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRegistration/abort",
            "summary": "The abort() method of the BackgroundFetchRegistration interface aborts an active background fetch.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRegistration.abort()"
        }
    ],
    "dom-backgroundfetchregistration-downloaded": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRegistration.json",
            "name": "downloaded",
            "slug": "API/BackgroundFetchRegistration/downloaded",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRegistration/downloaded",
            "summary": "The downloaded read-only property of the BackgroundFetchRegistration interface returns the size in bytes that has been downloaded, initially 0.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRegistration.downloaded"
        }
    ],
    "dom-backgroundfetchregistration-downloadtotal": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRegistration.json",
            "name": "downloadTotal",
            "slug": "API/BackgroundFetchRegistration/downloadTotal",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRegistration/downloadTotal",
            "summary": "The downloadTotal read-only property of the BackgroundFetchRegistration interface returns the total size in bytes of this download. This is set when the background fetch was registered, or 0 if not set.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRegistration.downloadTotal"
        }
    ],
    "dom-backgroundfetchregistration-failurereason": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRegistration.json",
            "name": "failureReason",
            "slug": "API/BackgroundFetchRegistration/failureReason",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRegistration/failureReason",
            "summary": "The failureReason read-only property of the BackgroundFetchRegistration interface returns a string with a value that indicates a reason for a background fetch failure.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRegistration.failureReason"
        }
    ],
    "dom-backgroundfetchregistration-id": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRegistration.json",
            "name": "id",
            "slug": "API/BackgroundFetchRegistration/id",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRegistration/id",
            "summary": "The id read-only property of the BackgroundFetchRegistration interface returns a copy of the background fetch's ID.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRegistration.id"
        }
    ],
    "background-fetch-registration-match": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRegistration.json",
            "name": "match",
            "slug": "API/BackgroundFetchRegistration/match",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRegistration/match",
            "summary": "The match() method of the BackgroundFetchRegistration interface returns the first matching BackgroundFetchRecord.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRegistration.match()"
        }
    ],
    "background-fetch-registration-match-all": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRegistration.json",
            "name": "matchAll",
            "slug": "API/BackgroundFetchRegistration/matchAll",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRegistration/matchAll",
            "summary": "The matchAll() method of the BackgroundFetchRegistration interface returns an array of matching BackgroundFetchRecord objects.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRegistration.matchAll()"
        }
    ],
    "background-fetch-registration-events": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRegistration.json",
            "name": "progress_event",
            "slug": "API/BackgroundFetchRegistration/progress_event",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRegistration/progress_event",
            "summary": "The progress event of the BackgroundFetchRegistration interface thrown when the associated background fetch progresses.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRegistration: progress event"
        }
    ],
    "dom-backgroundfetchregistration-recordsavailable": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRegistration.json",
            "name": "recordsAvailable",
            "slug": "API/BackgroundFetchRegistration/recordsAvailable",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRegistration/recordsAvailable",
            "summary": "The recordsAvailable read-only property of the BackgroundFetchRegistration interface returns true if there are requests and responses to be accessed. If this returns false then match() and matchAll() can't be used.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRegistration.recordsAvailable"
        }
    ],
    "dom-backgroundfetchregistration-result": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRegistration.json",
            "name": "result",
            "slug": "API/BackgroundFetchRegistration/result",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRegistration/result",
            "summary": "The result read-only property of the BackgroundFetchRegistration interface returns a string indicating whether the background fetch was successful or failed.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRegistration.result"
        }
    ],
    "dom-backgroundfetchregistration-uploaded": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRegistration.json",
            "name": "uploaded",
            "slug": "API/BackgroundFetchRegistration/uploaded",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRegistration/uploaded",
            "summary": "The uploaded read-only property of the BackgroundFetchRegistration interface returns the size in bytes successfully sent, initially 0.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRegistration.uploaded"
        }
    ],
    "dom-backgroundfetchregistration-uploadtotal": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRegistration.json",
            "name": "uploadTotal",
            "slug": "API/BackgroundFetchRegistration/uploadTotal",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRegistration/uploadTotal",
            "summary": "The uploadTotal read-only property of the BackgroundFetchRegistration interface returns the total number of bytes to be sent to the server.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRegistration.uploadTotal"
        }
    ],
    "background-fetch-registration": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchRegistration.json",
            "name": "BackgroundFetchRegistration",
            "slug": "API/BackgroundFetchRegistration",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchRegistration",
            "summary": "The BackgroundFetchRegistration interface of the Background Fetch API represents an individual background fetch.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchRegistration"
        }
    ],
    "dom-backgroundfetchupdateuievent-backgroundfetchupdateuievent": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchUpdateUIEvent.json",
            "name": "BackgroundFetchUpdateUIEvent",
            "slug": "API/BackgroundFetchUpdateUIEvent/BackgroundFetchUpdateUIEvent",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchUpdateUIEvent/BackgroundFetchUpdateUIEvent",
            "summary": "The BackgroundFetchUpdateUIEvent() constructor creates a new BackgroundFetchUpdateUIEvent object. This constructor is not typically used as the browser creates these objects itself and provides them to background fetch event callbacks.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchUpdateUIEvent()"
        }
    ],
    "background-fetch-update-ui-event-update-ui": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchUpdateUIEvent.json",
            "name": "updateUI",
            "slug": "API/BackgroundFetchUpdateUIEvent/updateUI",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchUpdateUIEvent/updateUI",
            "summary": "The updateUI() method of the BackgroundFetchUpdateUIEvent interface updates the title and icon in the user interface to show the status of a background fetch.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchUpdateUIEvent.updateUI()"
        }
    ],
    "background-fetch-update-ui-event": [
        {
            "engines": [
                "blink"
            ],
            "filename": "api/BackgroundFetchUpdateUIEvent.json",
            "name": "BackgroundFetchUpdateUIEvent",
            "slug": "API/BackgroundFetchUpdateUIEvent",
            "mdn_url": "https://developer.mozilla.org/en-US/docs/Web/API/BackgroundFetchUpdateUIEvent",
            "summary": "The BackgroundFetchUpdateUIEvent interface of the Background Fetch API is an event type for the backgroundfetchsuccess and backgroundfetchfail events, and provides a method for updating the title and icon of the app to inform a user of the success or failure of a background fetch.",
            "support": {
                "chrome": {
                    "version_added": "74"
                },
                "chrome_android": "mirror",
                "edge": "mirror",
                "firefox": {
                    "version_added": false
                },
                "firefox_android": "mirror",
                "ie": {
                    "version_added": false
                },
                "oculus": "mirror",
                "opera": "mirror",
                "opera_android": "mirror",
                "safari": {
                    "version_added": false
                },
                "safari_ios": "mirror",
                "samsunginternet_android": "mirror",
                "webview_android": {
                    "version_added": false
                },
                "edge_blink": {
                    "version_added": "79"
                }
            },
            "title": "BackgroundFetchUpdateUIEvent"
        }
    ]
}
