/**
 * @param plugins Can also be included with the Processor#use method.
 * @returns A processor that will apply plugins as CSS processors.
 */
declare function postcss(plugins?: postcss.AcceptedPlugin[]): postcss.Processor;
declare function postcss(...plugins: postcss.AcceptedPlugin[]): postcss.Processor;
declare namespace postcss {
    type AcceptedPlugin = Plugin<any> | Transformer | {
        postcss: TransformCallback | Processor;
    } | Processor;
    /**
     * Creates a PostCSS plugin with a standard API.
     * @param name Plugin name. Same as in name property in package.json. It will
     * be saved in plugin.postcssPlugin property.
     * @param initializer Will receive plugin options and should return functions
     * to modify nodes in input CSS.
     */
    function plugin<T>(name: string, initializer: PluginInitializer<T>): Plugin<T>;
    interface Plugin<T> extends Transformer {
        (opts?: T): Transformer;
        postcss: Transformer;
        process: (css: string | {
            toString(): string;
        } | Result, opts?: any) => LazyResult;
    }
    interface Transformer extends TransformCallback {
        postcssPlugin?: string;
        postcssVersion?: string;
    }
    interface TransformCallback {
        /**
         * @returns Asynchronous plugins should return a promise.
         */
        (root: Root, result?: Result): void | Function | any;
    }
    interface PluginInitializer<T> {
        (pluginOptions?: T): Transformer;
    }
    /**
     * Contains helpers for working with vendor prefixes.
     */
    export namespace vendor {
        /**
         * @returns The vendor prefix extracted from the input string.
         */
        function prefix(prop: string): string;
        /**
         * @returns The input string stripped of its vendor prefix.
         */
        function unprefixed(prop: string): string;
    }
    export class Stringifier {
        builder: Stringifier.Builder;
        constructor(builder?: Stringifier.Builder);
        stringify(node: Node, semicolon?: boolean): void;
        root(node: any): void;
        comment(node: any): void;
        decl(node: any, semicolon: any): void;
        rule(node: any): void;
        atrule(node: any, semicolon: any): void;
        body(node: any): void;
        block(node: any, start: any): void;
        raw(node: Node, own: string, detect?: string): any;
        rawSemicolon(root: any): any;
        rawEmptyBody(root: any): any;
        rawIndent(root: any): any;
        rawBeforeComment(root: any, node: any): any;
        rawBeforeDecl(root: any, node: any): any;
        rawBeforeRule(root: any): any;
        rawBeforeClose(root: any): any;
        rawBeforeOpen(root: any): any;
        rawColon(root: any): any;
        beforeAfter(node: any, detect: any): any;
        rawValue(node: any, prop: any): any;
    }
    export namespace Stringifier {
        interface Builder {
            (str: string, node?: Node, str2?: string): void;
        }
    }
    /**
     * Default function to convert a node tree into a CSS string.
     */
    function stringify(node: Node, builder: Stringifier.Builder): void;
    /**
     * Parses source CSS.
     * @param css The CSS to parse.
     * @param options
     * @returns {} A new Root node, which contains the source CSS nodes.
     */
    function parse(css: string | {
        toString(): string;
    } | LazyResult | Result, options?: {
        from?: string;
        map?: postcss.SourceMapOptions;
    }): Root;
    /**
     * Contains helpers for safely splitting lists of CSS values, preserving
     * parentheses and quotes.
     */
    export namespace list {
        /**
         * Safely splits space-separated values (such as those for background,
         * border-radius and other shorthand properties).
         */
        function space(str: string): string[];
        /**
         * Safely splits comma-separated values (such as those for transition-* and
         * background  properties).
         */
        function comma(str: string): string[];
    }
    /**
     * Creates a new Comment node.
     * @param defaults Properties for the new Comment node.
     * @returns The new node.
     */
    function comment(defaults?: CommentNewProps): Comment;
    /**
     * Creates a new AtRule node.
     * @param defaults Properties for the new AtRule node.
     * @returns The new node.
     */
    function atRule(defaults?: AtRuleNewProps): AtRule;
    /**
     * Creates a new Declaration node.
     * @param defaults Properties for the new Declaration node.
     * @returns The new node.
     */
    function decl(defaults?: DeclarationNewProps): Declaration;
    /**
     * Creates a new Rule node.
     * @param defaults Properties for the new Rule node.
     * @returns The new node.
     */
    function rule(defaults?: RuleNewProps): Rule;
    /**
     * Creates a new Root node.
     * @param defaults Properties for the new Root node.
     * @returns The new node.
     */
    function root(defaults?: Object): Root;
    interface SourceMapOptions {
        /**
         * Indicates that the source map should be embedded in the output CSS as a
         * Base64-encoded comment. By default, it is true. But if all previous maps
         * are external, not inline, PostCSS will not embed the map even if you do
         * not set this option.
         *
         * If you have an inline source map, the result.map property will be empty,
         * as the source map will be contained within the text of result.css.
         */
        inline?: boolean;
        /**
         * Source map content from a previous processing step (e.g., Sass compilation).
         * PostCSS will try to read the previous source map automatically (based on comments
         * within the source CSS), but you can use this option to identify it manually.
         * If desired, you can omit the previous map with prev: false.
         */
        prev?: any;
        /**
         * Indicates that PostCSS should set the origin content (e.g., Sass source)
         * of the source map. By default, it is true. But if all previous maps do not
         * contain sources content, PostCSS will also leave it out even if you do not set
         * this option.
         */
        sourcesContent?: boolean;
        /**
         * Indicates that PostCSS should add annotation comments to the CSS. By default,
         * PostCSS will always add a comment with a path to the source map. PostCSS will
         * not add annotations to CSS files that do not contain any comments.
         *
         * By default, PostCSS presumes that you want to save the source map as
         * opts.to + '.map' and will use this path in the annotation comment. A different
         * path can be set by providing a string value for annotation.
         *
         * If you have set inline: true, annotation cannot be disabled.
         */
        annotation?: boolean | string;
        /**
         * If true, PostCSS will try to correct any syntax errors that it finds in the CSS.
         * This is useful for legacy code filled with hacks. Another use-case is interactive
         * tools with live input — for example, the Autoprefixer demo.
         */
        safe?: boolean;
    }
    /**
     * A Processor instance contains plugins to process CSS. Create one
     * Processor  instance, initialize its plugins, and then use that instance
     * on numerous CSS files.
     */
    interface Processor {
        /**
         * Adds a plugin to be used as a CSS processor. Plugins can also be
         * added by passing them as arguments when creating a postcss instance.
         */
        use(plugin: AcceptedPlugin): Processor;
        /**
         * Parses source CSS. Because some plugins can be asynchronous it doesn't
         * make any transformations. Transformations will be applied in LazyResult's
         * methods.
         * @param css Input CSS or any object with toString() method, like a file
         * stream. If a Result instance is passed the processor will take the
         * existing Root parser from it.
         */
        process(css: string | {
            toString(): string;
        } | Result, options?: ProcessOptions): LazyResult;
        /**
         * Contains plugins added to this processor.
         */
        plugins: Plugin<any>[];
        /**
         * Contains the current version of PostCSS (e.g., "4.0.5").
         */
        version: string;
    }
    interface ProcessOptions extends Syntax {
        /**
         * The path of the CSS source file. You should always set from, because it is
         * used in source map generation and syntax error messages.
         */
        from?: string;
        /**
         * The path where you'll put the output CSS file. You should always set it
         * to generate correct source maps.
         */
        to?: string;
        syntax?: Syntax;
        /**
         * Enable Safe Mode, in which PostCSS will try to fix CSS syntax errors.
         */
        safe?: boolean;
        map?: postcss.SourceMapOptions;
        /**
         * Function to generate AST by string.
         */
        parser?: Parse | Syntax;
        /**
         * Class to generate string by AST.
         */
        stringifier?: Stringify | Syntax;
    }
    interface Syntax {
        /**
         * Function to generate AST by string.
         */
        parse?: Parse;
        /**
         * Class to generate string by AST.
         */
        stringify?: Stringify;
    }
    interface Parse {
        (css?: string, opts?: postcss.SourceMapOptions): Root;
    }
    interface Stringify {
        (node?: postcss.Node, builder?: any): postcss.Result | void;
    }
    /**
     * A promise proxy for the result of PostCSS transformations.
     */
    interface LazyResult {
        /**
         * Processes input CSS through synchronous and asynchronous plugins.
         * @param onRejected Called if any plugin throws an error.
         */
        then(onFulfilled: (result: Result) => void, onRejected?: (error: Error) => void): Function | any;
        /**
         * Processes input CSS through synchronous and asynchronous plugins.
         * @param onRejected Called if any plugin throws an error.
         */
        catch(onRejected: (error: Error) => void): Function | any;
        /**
         * Alias for css property.
         */
        toString(): string;
        /**
         * Processes input CSS through synchronous plugins and converts Root to
         * CSS string. This property will only work with synchronous plugins. If
         * the processor contains any asynchronous plugins it will throw an error.
         * In this case, you should use LazyResult#then() instead.
         * @returns Result#css.
         */
        css: string;
        /**
         * Alias for css property to use when syntaxes generate non-CSS output.
         */
        content: string;
        /**
         * Processes input CSS through synchronous plugins. This property will
         * work only with synchronous plugins. If processor contains any
         * asynchronous plugins it will throw an error. You should use
         * LazyResult#then() instead.
         */
        map: ResultMap;
        /**
         * Processes input CSS through synchronous plugins. This property will work
         * only with synchronous plugins. If processor contains any asynchronous
         * plugins it will throw an error. You should use LazyResult#then() instead.
         */
        root: Root;
        /**
         * Processes input CSS through synchronous plugins and calls Result#warnings().
         * This property will only work with synchronous plugins. If the processor
         * contains any asynchronous plugins it will throw an error. In this case,
         * you should use LazyResult#then() instead.
         */
        warnings(): ResultMessage[];
        /**
         * Processes input CSS through synchronous plugins. This property will work
         * only with synchronous plugins. If processor contains any asynchronous
         * plugins it will throw an error. You should use LazyResult#then() instead.
         */
        messages: ResultMessage[];
        /**
         * @returns A processor used for CSS transformations.
         */
        processor: Processor;
        /**
         * @returns Options from the Processor#process(css, opts) call that produced
         * this Result instance.
         */
        opts: ResultOptions;
    }
    /**
     * Provides the result of the PostCSS transformations.
     */
    interface Result {
        /**
         * Alias for css property.
         */
        toString(): string;
        /**
         * Creates an instance of Warning and adds it to messages.
         * @param message Used in the text property of the message object.
         * @param options Properties for Message object.
         */
        warn(message: string, options?: WarningOptions): void;
        /**
         * @returns Warnings from plugins, filtered from messages.
         */
        warnings(): ResultMessage[];
        /**
         * A CSS string representing this Result's Root instance.
         */
        css: string;
        /**
         * Alias for css property to use with syntaxes that generate non-CSS output.
         */
        content: string;
        /**
         * An instance of the SourceMapGenerator class from the source-map library,
         * representing changes to the Result's Root instance.
         * This property will have a value only if the user does not want an inline
         * source map. By default, PostCSS generates inline source maps, written
         * directly into the processed CSS. The map property will be empty by default.
         * An external source map will be generated — and assigned to map — only if
         * the user has set the map.inline option to false, or if PostCSS was passed
         * an external input source map.
         */
        map: ResultMap;
        /**
         * Contains the Root node after all transformations.
         */
        root?: Root;
        /**
         * Contains messages from plugins (e.g., warnings or custom messages).
         * Add a warning using Result#warn() and get all warnings
         * using the Result#warnings() method.
         */
        messages: ResultMessage[];
        /**
         * The Processor instance used for this transformation.
         */
        processor?: Processor;
        /**
         * Options from the Processor#process(css, opts) or Root#toResult(opts) call
         * that produced this Result instance.
         */
        opts?: ResultOptions;
    }
    interface ResultOptions extends ProcessOptions {
        /**
         * The CSS node that was the source of the warning.
         */
        node?: postcss.Node;
        /**
         * Name of plugin that created this warning. Result#warn() will fill it
         * automatically with plugin.postcssPlugin value.
         */
        plugin?: string;
    }
    interface ResultMap {
        /**
         * Add a single mapping from original source line and column to the generated
         * source's line and column for this source map being created. The mapping
         * object should have the following properties:
         * @param mapping
         * @returns {}
         */
        addMapping(mapping: {
            generated: {
                line: number;
                column: number;
            };
            original: {
                line: number;
                column: number;
            };
            /**
             * The original source file (relative to the sourceRoot).
             */
            source: string;
            name?: string;
        }): void;
        /**
         * Set the source content for an original source file.
         * @param sourceFile The URL of the original source file.
         * @param sourceContent The content of the source file.
         */
        setSourceContent(sourceFile: string, sourceContent: string): void;
        /**
         * Applies a SourceMap for a source file to the SourceMap. Each mapping to
         * the supplied source file is rewritten using the supplied SourceMap.
         * Note: The resolution for the resulting mappings is the minimium of this
         * map and the supplied map.
         * @param sourceMapConsumer The SourceMap to be applied.
         * @param sourceFile The filename of the source file. If omitted, sourceMapConsumer
         * file will be used, if it exists. Otherwise an error will be thrown.
         * @param sourceMapPath The dirname of the path to the SourceMap to be applied.
         * If relative, it is relative to the SourceMap. This parameter is needed when
         * the two SourceMaps aren't in the same directory, and the SourceMap to be
         * applied contains relative source paths. If so, those relative source paths
         * need to be rewritten relative to the SourceMap.
         * If omitted, it is assumed that both SourceMaps are in the same directory;
         * thus, not needing any rewriting (Supplying '.' has the same effect).
         */
        applySourceMap(sourceMapConsumer: any, sourceFile?: string, sourceMapPath?: string): void;
        /**
         * Renders the source map being generated to JSON.
         */
        toJSON: () => any;
        /**
         * Renders the source map being generated to a string.
         */
        toString: () => string;
    }
    interface ResultMessage {
        type: string;
        text?: string;
        plugin?: string;
        browsers?: string[];
    }
    /**
     * Represents a plugin warning. It can be created using Result#warn().
     */
    interface Warning {
        /**
         * @returns Error position, message.
         */
        toString(): string;
        /**
         * Contains the warning message.
         */
        text: string;
        /**
         * Contains the name of the plugin that created this warning. When you
         * call Result#warn(), it will fill this property automatically.
         */
        plugin: string;
        /**
         * The CSS node that caused the warning.
         */
        node: Node;
        /**
         * The line in the input file with this warning's source.
         */
        line: number;
        /**
         * Column in the input file with this warning's source.
         */
        column: number;
    }
    interface WarningOptions extends ResultOptions {
        /**
         * A word inside a node's string that should be highlighted as source
         * of warning.
         */
        word?: string;
        /**
         * The index inside a node's string that should be highlighted as
         * source of warning.
         */
        index?: number;
    }
    /**
     * The CSS parser throws this error for broken CSS.
     */
    interface CssSyntaxError extends InputOrigin {
        name: string;
        /**
         * @returns Error position, message and source code of broken part.
         */
        toString(): string;
        /**
         * @param color Whether arrow should be colored red by terminal color codes.
         * By default, PostCSS will use process.stdout.isTTY and
         * process.env.NODE_DISABLE_COLORS.
         * @returns A few lines of CSS source that caused the error. If CSS has
         * input source map without sourceContent this method will return an empty
         * string.
         */
        showSourceCode(color?: boolean): string;
        /**
         * Contains full error text in the GNU error format.
         */
        message: string;
        /**
         * Contains only the error description.
         */
        reason: string;
        /**
         * Contains the PostCSS plugin name if the error didn't come from the
         * CSS parser.
         */
        plugin?: string;
        input?: InputOrigin;
    }
    interface InputOrigin {
        /**
         * If parser's from option is set, contains the absolute path to the
         * broken file. PostCSS will use the input source map to detect the
         * original error location. If you wrote a Sass file, then compiled it
         * to CSS and parsed it with PostCSS, PostCSS will show the original
         * position in the Sass file. If you need the position in the PostCSS
         * input (e.g., to debug the previous compiler), use error.input.file.
         */
        file?: string;
        /**
         * Contains the source line of the error. PostCSS will use the input
         * source map to detect the original error location. If you wrote a Sass
         * file, then compiled it to CSS and parsed it with PostCSS, PostCSS
         * will show the original position in the Sass file. If you need the
         * position in the PostCSS input (e.g., to debug the previous
         * compiler), use error.input.line.
         */
        line?: number;
        /**
         * Contains the source column of the error. PostCSS will use input
         * source map to detect the original error location. If you wrote a
         * Sass file, then compiled it to CSS and parsed it with PostCSS,
         * PostCSS will show the original position in the Sass file. If you
         * need the position in the PostCSS input (e.g., to debug the
         * previous compiler), use error.input.column.
         */
        column?: number;
        /**
         * Contains the source code of the broken file. PostCSS will use the
         * input source map to detect the original error location. If you wrote
         * a Sass file, then compiled it to CSS and parsed it with PostCSS,
         * PostCSS will show the original position in the Sass file. If you need
         * the position in the PostCSS input (e.g., to debug the previous
         * compiler), use error.input.source.
         */
        source?: string;
    }
    export class PreviousMap {
        private inline;
        annotation: string;
        root: string;
        private consumerCache;
        text: string;
        file: string;
        constructor(css: any, opts: any);
        consumer(): any;
        withContent(): boolean;
        startWith(string: any, start: any): boolean;
        loadAnnotation(css: any): void;
        decodeInline(text: any): any;
        loadMap(file: any, prev: any): any;
        isMap(map: any): boolean;
    }
    /**
     * Represents the source CSS.
     */
    interface Input {
        /**
         * The absolute path to the CSS source file defined with the "from" option.
         */
        file: string;
        /**
         * The unique ID of the CSS source. Used if "from" option is not provided
         * (because PostCSS does not know the file path).
         */
        id: string;
        /**
         * The CSS source identifier. Contains input.file if the user set the
         * "from" option, or input.id if they did not.
         */
        from: string;
        /**
         * Represents the input source map passed from a compilation step before
         * PostCSS (e.g., from the Sass compiler).
         */
        map: PreviousMap;
        /**
         * Reads the input source map.
         * @returns A symbol position in the input source (e.g., in a Sass file
         * that was compiled to CSS before being passed to PostCSS):
         */
        origin(line: number, column: number): InputOrigin;
    }
    type ChildNode = AtRule | Rule | Declaration | Comment;
    type Node = Root | ChildNode;
    interface NodeBase {
        /**
         * Returns the input source of the node. The property is used in source
         * map generation. If you create a node manually
         * (e.g., with postcss.decl() ), that node will not have a source
         * property and will be absent from the source map. For this reason, the
         * plugin developer should consider cloning nodes to create new ones
         * (in which case the new node's source will reference the original,
         * cloned node) or setting the source property manually.
         */
        source: NodeSource;
        /**
         * Contains information to generate byte-to-byte equal node string as it
         * was in origin input.
         */
        raws: NodeRaws;
        /**
         * @returns A CSS string representing the node.
         */
        toString(): string;
        /**
         * This method produces very useful error messages. If present, an input
         * source map will be used to get the original position of the source, even
         * from a previous compilation step (e.g., from Sass compilation).
         * @returns The original position of the node in the source, showing line
         * and column numbers and also a small excerpt to facilitate debugging.
         */
        error(
            /**
             * Error description.
             */
            message: string, options?: NodeErrorOptions): CssSyntaxError;
        /**
         * Creates an instance of Warning and adds it to messages. This method is
         * provided as a convenience wrapper for Result#warn.
         * Note that `opts.node` is automatically passed to Result#warn for you.
         * @param result The result that will receive the warning.
         * @param text Warning message. It will be used in the `text` property of
         * the message object.
         * @param opts Properties to assign to the message object.
         */
        warn(result: Result, text: string, opts?: WarningOptions): void;
        /**
         * @returns The next child of the node's parent; or, returns undefined if
         * the current node is the last child.
         */
        next(): ChildNode | void;
        /**
         * @returns The previous child of the node's parent; or, returns undefined
         * if the current node is the first child.
         */
        prev(): ChildNode | void;
		/**
		 * Insert new node before current node to current node’s parent.
		 * 
		 * Just an alias for `node.parent.insertBefore(node, newNode)`.
		 * 
		 * @returns this node for method chaining.
		 * 
		 * @example
		 * decl.before('content: ""');
		 */
		before(newNode: Node | object | string | Node[]): this;
		/**
		 * Insert new node after current node to current node’s parent.
		 * 
		 * Just an alias for `node.parent.insertAfter(node, newNode)`.
		 * 
		 * @returns this node for method chaining.
		 * 
		 * @example
		 * decl.after('color: black');
		 */
		after(newNode: Node | object | string | Node[]): this;
        /**
         * @returns The Root instance of the node's tree.
         */
        root(): Root;
        /**
         * Removes the node from its parent and cleans the parent property in the
         * node and its children.
         * @returns This node for chaining.
         */
        remove(): this;
        /**
         * Inserts node(s) before the current node and removes the current node.
         * @returns This node for chaining.
         */
        replaceWith(...nodes: (Node | Object)[]): this;
        /**
         * @param overrides New properties to override in the clone.
         * @returns A clone of this node. The node and its (cloned) children will
         * have a clean parent and code style properties.
         */
        clone(overrides?: Object): this;
        /**
         * Shortcut to clone the node and insert the resulting cloned node before
         * the current node.
         * @param overrides New Properties to override in the clone.
         * @returns The cloned node.
         */
        cloneBefore(overrides?: Object): this;
        /**
         * Shortcut to clone the node and insert the resulting cloned node after
         * the current node.
         * @param overrides New Properties to override in the clone.
         * @returns The cloned node.
         */
        cloneAfter(overrides?: Object): this;
        /**
         * @param prop Name or code style property.
         * @param defaultType Name of default value. It can be easily missed if the
         * value is the same as prop.
         * @returns A code style property value. If the node is missing the code
         * style property (because the node was manually built or cloned), PostCSS
         * will try to autodetect the code style property by looking at other nodes
         * in the tree.
         */
        raw(prop: string, defaultType?: string): any;
    }
    interface NodeNewProps {
        raws?: NodeRaws;
    }
    interface NodeRaws {
        /**
         * The space symbols before the node. It also stores `*` and `_`
         * symbols before the declaration (IE hack).
         */
        before?: string;
        /**
         * The space symbols after the last child of the node to the end of
         * the node.
         */
        after?: string;
        /**
         * The symbols between the property and value for declarations,
         * selector and "{" for rules, last parameter and "{" for at-rules.
         */
        between?: string;
        /**
         * True if last child has (optional) semicolon.
         */
        semicolon?: boolean;
        /**
         * The space between the at-rule's name and parameters.
         */
        afterName?: string;
        /**
         * The space symbols between "/*" and comment's text.
         */
        left?: string;
        /**
         * The space symbols between comment's text and "*\/".
         */
        right?: string;
        /**
         * The content of important statement, if it is not just "!important".
         */
        important?: string;
    }
    interface NodeSource {
        input: Input;
        /**
         * The starting position of the node's source.
         */
        start?: {
            column: number;
            line: number;
        };
        /**
         * The ending position of the node's source.
         */
        end?: {
            column: number;
            line: number;
        };
    }
    interface NodeErrorOptions {
        /**
         * Plugin name that created this error. PostCSS will set it automatically.
         */
        plugin?: string;
        /**
         * A word inside a node's string, that should be highlighted as source
         * of error.
         */
        word?: string;
        /**
         * An index inside a node's string that should be highlighted as source
         * of error.
         */
        index?: number;
    }
    interface JsonNode {
        /**
         * Returns a string representing the node's type. Possible values are
         * root, atrule, rule, decl or comment.
         */
        type?: string;
        /**
         * Returns the node's parent node.
         */
        parent?: JsonContainer;
        /**
         * Returns the input source of the node. The property is used in source
         * map generation. If you create a node manually (e.g., with
         * postcss.decl() ), that node will not have a  source  property and
         * will be absent from the source map. For this reason, the plugin
         * developer should consider cloning nodes to create new ones (in which
         * case the new node's source will reference the original, cloned node)
         * or setting the source property manually.
         */
        source?: NodeSource;
        /**
         * Contains information to generate byte-to-byte equal node string as it
         * was in origin input.
         */
        raws?: NodeRaws;
    }
    type Container = Root | AtRule | Rule;
    /**
     * Containers can store any content. If you write a rule inside a rule,
     * PostCSS will parse it.
     */
    interface ContainerBase extends NodeBase {
        /**
         * Contains the container's children.
         */
        nodes?: ChildNode[];
        /**
         * @returns The container's first child.
         */
        first?: ChildNode;
        /**
         * @returns The container's last child.
         */
        last?: ChildNode;
        /**
         * @param overrides New properties to override in the clone.
         * @returns A clone of this node. The node and its (cloned) children will
         * have a clean parent and code style properties.
         */
        clone(overrides?: Object): this;
        /**
         * @param child Child of the current container.
         * @returns The child's index within the container's "nodes" array.
         */
        index(child: ChildNode | number): number;
        /**
         * Determines whether all child nodes satisfy the specified test.
         * @param callback A function that accepts up to three arguments. The
         * every method calls the callback function for each node until the
         * callback returns false, or until the end of the array.
         * @returns True if the callback returns true for all of the container's
         * children.
         */
        every(callback: (node: ChildNode, index: number, nodes: ChildNode[]) => any, thisArg?: any): boolean;
        /**
         * Determines whether the specified callback returns true for any child node.
         * @param callback A function that accepts up to three arguments. The some
         * method calls the callback for each node until the callback returns true,
         * or until the end of the array.
         * @param thisArg An object to which the this keyword can refer in the
         * callback function. If thisArg is omitted, undefined is used as the
         * this value.
         * @returns True if callback returns true for (at least) one of the
         * container's children.
         */
        some(callback: (node: ChildNode, index: number, nodes: ChildNode[]) => boolean, thisArg?: any): boolean;
        /**
         * Iterates through the container's immediate children, calling the
         * callback function for each child. If you need to recursively iterate
         * through all the container's descendant nodes, use container.walk().
         * Unlike the for {} -cycle or Array#forEach() this iterator is safe if
         * you are mutating the array of child nodes during iteration.
         * @param callback Iterator. Returning false will break iteration. Safe
         * if you are mutating the array of child nodes during iteration. PostCSS
         * will adjust the current index to match the mutations.
         * @returns False if the callback returns false during iteration.
         */
        each(callback: (node: ChildNode, index: number) => any): boolean | void;
        /**
         * Traverses the container's descendant nodes, calling `callback` for each
         * node. Like container.each(), this method is safe to use if you are
         * mutating arrays during iteration. If you only need to iterate through
         * the container's immediate children, use container.each().
         * @param callback Iterator.
         */
        walk(callback: (node: ChildNode, index: number) => any): boolean | void;
        /**
         * Traverses the container's descendant nodes, calling `callback` for each
         * declaration. Like container.each(), this method is safe to use if you
         * are mutating arrays during iteration.
         * @param propFilter Filters declarations by property name. Only those
         * declarations whose property matches propFilter will be iterated over.
         * @param callback Called for each declaration node within the container.
         */
        walkDecls(propFilter: string | RegExp, callback?: (decl: Declaration, index: number) => any): boolean | void;
        walkDecls(callback: (decl: Declaration, index: number) => any): boolean | void;
        /**
         * Traverses the container's descendant nodes, calling `callback` for each
         * at-rule. Like container.each(), this method is safe to use if you are
         * mutating arrays during iteration.
         * @param nameFilter Filters at-rules by name. If provided, iteration
         * will only happen over at-rules that have matching names.
         * @param callback Iterator called for each at-rule node within the
         * container.
         */
        walkAtRules(nameFilter: string | RegExp, callback: (atRule: AtRule, index: number) => any): boolean | void;
        walkAtRules(callback: (atRule: AtRule, index: number) => any): boolean | void;
        /**
         * Traverses the container's descendant nodes, calling `callback` for each
         * rule. Like container.each(), this method is safe to use if you are
         * mutating arrays during iteration.
         * @param selectorFilter Filters rules by selector. If provided,
         * iteration will only happen over rules that have matching names.
         * @param callback Iterator called for each rule node within the
         * container.
         */
        walkRules(selectorFilter: string | RegExp, callback: (atRule: Rule, index: number) => any): boolean | void;
        walkRules(callback: (atRule: Rule, index: number) => any): boolean | void;
        walkRules(selectorFilter: any, callback?: (atRule: Rule, index: number) => any): boolean | void;
        /**
         * Traverses the container's descendant nodes, calling `callback` for each
         * comment. Like container.each(), this method is safe to use if you are
         * mutating arrays during iteration.
         * @param callback Iterator called for each comment node within the container.
         */
        walkComments(callback: (comment: Comment, indexed: number) => any): void | boolean;
        /**
         * Passes all declaration values within the container that match pattern
         * through the callback, replacing those values with the returned result of
         * callback. This method is useful if you are using a custom unit or
         * function and need to iterate through all values.
         * @param pattern Pattern that we need to replace.
         * @param options Options to speed up the search.
         * @param callbackOrReplaceValue String to replace pattern or callback
         * that will return a new value. The callback will receive the same
         * arguments as those passed to a function parameter of String#replace.
         */
        replaceValues(pattern: string | RegExp, options: {
            /**
             * Property names. The method will only search for values that match
             * regexp  within declarations of listed properties.
             */
            props?: string[];
            /**
             * Used to narrow down values and speed up the regexp search. Searching
             * every single value with a regexp can be slow. If you pass a fast
             * string, PostCSS will first check whether the value contains the fast
             * string; and only if it does will PostCSS check that value against
             * regexp. For example, instead of just checking for /\d+rem/ on all
             * values, set fast: 'rem' to first check whether a value has the rem
             * unit, and only if it does perform the regexp check.
             */
            fast?: string;
        }, callbackOrReplaceValue: string | {
            (substring: string, ...args: any[]): string;
        }): this;
        replaceValues(pattern: string | RegExp, callbackOrReplaceValue: string | {
            (substring: string, ...args: any[]): string;
        }): this;
        /**
         * Inserts new nodes to the beginning of the container.
         * Because each node class is identifiable by unique properties, use the
         * following shortcuts to create nodes in insert methods:
         *     root.prepend({ name: '@charset', params: '"UTF-8"' }); // at-rule
         *     root.prepend({ selector: 'a' });                       // rule
         *     rule.prepend({ prop: 'color', value: 'black' });       // declaration
         *     rule.prepend({ text: 'Comment' })                      // comment
         * A string containing the CSS of the new element can also be used. This
         * approach is slower than the above shortcuts.
         *     root.prepend('a {}');
         *     root.first.prepend('color: black; z-index: 1');
         * @param nodes New nodes.
         * @returns This container for chaining.
         */
        prepend(...nodes: (Node | Object | string)[]): this;
        /**
         * Inserts new nodes to the end of the container.
         * Because each node class is identifiable by unique properties, use the
         * following shortcuts to create nodes in insert methods:
         *     root.append({ name: '@charset', params: '"UTF-8"' }); // at-rule
         *     root.append({ selector: 'a' });                       // rule
         *     rule.append({ prop: 'color', value: 'black' });       // declaration
         *     rule.append({ text: 'Comment' })                      // comment
         * A string containing the CSS of the new element can also be used. This
         * approach is slower than the above shortcuts.
         *     root.append('a {}');
         *     root.first.append('color: black; z-index: 1');
         * @param nodes New nodes.
         * @returns This container for chaining.
         */
        append(...nodes: (Node | Object | string)[]): this;
        /**
         * Insert newNode before oldNode within the container.
         * @param oldNode Child or child's index.
         * @returns This container for chaining.
         */
        insertBefore(oldNode: ChildNode | number, newNode: ChildNode | Object | string): this;
        /**
         * Insert newNode after oldNode within the container.
         * @param oldNode Child or child's index.
         * @returns This container for chaining.
         */
        insertAfter(oldNode: ChildNode | number, newNode: ChildNode | Object | string): this;
        /**
         * Removes the container from its parent and cleans the parent property in the
         * container and its children.
         * @returns This container for chaining.
         */
        remove(): this;
        /**
         * Removes child from the container and cleans the parent properties
         * from the node and its children.
         * @param child Child or child's index.
         * @returns This container for chaining.
         */
        removeChild(child: ChildNode | number): this;
        /**
         * Removes all children from the container and cleans their parent
         * properties.
         * @returns This container for chaining.
         */
        removeAll(): this;
    }
    interface ContainerNewProps extends NodeNewProps {
        /**
         * Contains the container's children.
         */
        nodes?: ChildNode[];
        raws?: ContainerRaws;
    }
    interface ContainerRaws extends NodeRaws {
        indent?: string;
    }
    interface JsonContainer extends JsonNode {
        /**
         * Contains the container's children.
         */
        nodes?: ChildNode[];
        /**
         * @returns The container's first child.
         */
        first?: ChildNode;
        /**
         * @returns The container's last child.
         */
        last?: ChildNode;
    }
    /**
     * Represents a CSS file and contains all its parsed nodes.
     */
    interface Root extends ContainerBase {
        type: 'root';
        /**
         * Inherited from Container. Should always be undefined for a Root node.
         */
        parent: void;
        /**
         * @param overrides New properties to override in the clone.
         * @returns A clone of this node. The node and its (cloned) children will
         * have a clean parent and code style properties.
         */
        clone(overrides?: Object): this;
        /**
         * @returns A Result instance representing the root's CSS.
         */
        toResult(options?: {
            /**
             * The path where you'll put the output CSS file. You should always
             * set "to" to generate correct source maps.
             */
            to?: string;
            map?: SourceMapOptions;
        }): Result;
        /**
         * Removes child from the root node, and the parent properties of node and
         * its children.
         * @param child Child or child's index.
         * @returns This root node for chaining.
         */
        removeChild(child: ChildNode | number): this;
    }
    interface RootNewProps extends ContainerNewProps {
    }
    interface JsonRoot extends JsonContainer {
    }
    /**
     * Represents an at-rule. If it's followed in the CSS by a {} block, this
     * node will have a nodes property representing its children.
     */
    interface AtRule extends ContainerBase {
        type: 'atrule';
        /**
         * Returns the atrule's parent node.
         */
        parent: Container;
        /**
         * The identifier that immediately follows the @.
         */
        name: string;
        /**
         * These are the values that follow the at-rule's name, but precede any {}
         * block. The spec refers to this area as the at-rule's "prelude".
         */
        params: string;
        /**
         * @param overrides New properties to override in the clone.
         * @returns A clone of this node. The node and its (cloned) children will
         * have a clean parent and code style properties.
         */
        clone(overrides?: Object): this;
    }
    interface AtRuleNewProps extends ContainerNewProps {
        /**
         * The identifier that immediately follows the @.
         */
        name?: string;
        /**
         * These are the values that follow the at-rule's name, but precede any {}
         * block. The spec refers to this area as the at-rule's "prelude".
         */
        params?: string | number;
        raws?: AtRuleRaws;
    }
    interface AtRuleRaws extends NodeRaws {
        params?: string;
    }
    interface JsonAtRule extends JsonContainer {
        /**
         * The identifier that immediately follows the @.
         */
        name?: string;
        /**
         * These are the values that follow the at-rule's name, but precede any {}
         * block. The spec refers to this area as the at-rule's "prelude".
         */
        params?: string;
    }
    /**
     * Represents a CSS rule: a selector followed by a declaration block.
     */
    interface Rule extends ContainerBase {
        type: 'rule';
        /**
         * Returns the rule's parent node.
         */
        parent: Container;
        /**
         * The rule's full selector. If there are multiple comma-separated selectors,
         * the entire group will be included.
         */
        selector: string;
        /**
         * An array containing the rule's individual selectors.
         * Groups of selectors are split at commas.
         */
        selectors?: string[];
        /**
         * @param overrides New properties to override in the clone.
         * @returns A clone of this node. The node and its (cloned) children will
         * have a clean parent and code style properties.
         */
        clone(overrides?: Object): this;
    }
    interface RuleNewProps extends ContainerNewProps {
        /**
         * The rule's full selector. If there are multiple comma-separated selectors,
         * the entire group will be included.
         */
        selector?: string;
        /**
         * An array containing the rule's individual selectors. Groups of selectors
         * are split at commas.
         */
        selectors?: string[];
        raws?: RuleRaws;
    }
    interface RuleRaws extends ContainerRaws {
        /**
        * The rule's full selector. If there are multiple comma-separated selectors,
        * the entire group will be included.
        */
        selector?: string;
    }
    interface JsonRule extends JsonContainer {
        /**
         * The rule's full selector. If there are multiple comma-separated selectors,
         * the entire group will be included.
         */
        selector?: string;
        /**
         * An array containing the rule's individual selectors.
         * Groups of selectors are split at commas.
         */
        selectors?: string[];
    }
    /**
     * Represents a CSS declaration.
     */
    interface Declaration extends NodeBase {
        type: 'decl';
        /**
         * Returns the declaration's parent node.
         */
        parent: Container;
        /**
         * The declaration's property name.
         */
        prop: string;
        /**
         * The declaration's value. This value will be cleaned of comments. If the
         * source value contained comments, those comments will be available in the
         * _value.raws property. If you have not changed the value, the result of
         * decl.toString() will include the original raws value (comments and all).
         */
        value: string;
        /**
         * True if the declaration has an !important annotation.
         */
        important: boolean;
        /**
         * @param overrides New properties to override in the clone.
         * @returns A clone of this node. The node and its (cloned) children will
         * have a clean parent and code style properties.
         */
        clone(overrides?: Object): this;
    }
    interface DeclarationNewProps {
        /**
         * The declaration's property name.
         */
        prop?: string;
        /**
         * The declaration's value. This value will be cleaned of comments. If the
         * source value contained comments, those comments will be available in the
         * _value.raws property. If you have not changed the value, the result of
         * decl.toString() will include the original raws value (comments and all).
         */
        value?: string;
        raws?: DeclarationRaws;
    }
    interface DeclarationRaws extends NodeRaws {
        /**
         * The declaration's value. This value will be cleaned of comments.
         * If the source value contained comments, those comments will be
         * available in the _value.raws property. If you have not changed the value, the result of
         * decl.toString() will include the original raws value (comments and all).
         */
        value?: string;
    }
    interface JsonDeclaration extends JsonNode {
        /**
         * True if the declaration has an !important annotation.
         */
        important?: boolean;
    }
    /**
     * Represents a comment between declarations or statements (rule and at-rules).
     * Comments inside selectors, at-rule parameters, or declaration values will
     * be stored in the Node#raws properties.
     */
    interface Comment extends NodeBase {
        type: 'comment';
        /**
         * Returns the comment's parent node.
         */
        parent: Container;
        /**
         * The comment's text.
         */
        text: string;
        /**
         * @param overrides New properties to override in the clone.
         * @returns A clone of this node. The node and its (cloned) children will
         * have a clean parent and code style properties.
         */
        clone(overrides?: Object): this;
    }
    interface CommentNewProps {
        /**
         * The comment's text.
         */
        text?: string;
    }
    interface JsonComment extends JsonNode {
    }
}
export = postcss;
