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https://github.com/thangisme/notes.git
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241 lines
22 KiB
JavaScript
241 lines
22 KiB
JavaScript
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'use strict';
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exports.__esModule = true;
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var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
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var _lazyResult = require('./lazy-result');
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var _lazyResult2 = _interopRequireDefault(_lazyResult);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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/**
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* Contains plugins to process CSS. Create one `Processor` instance,
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* initialize its plugins, and then use that instance on numerous CSS files.
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*
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* @example
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* const processor = postcss([autoprefixer, precss]);
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* processor.process(css1).then(result => console.log(result.css));
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* processor.process(css2).then(result => console.log(result.css));
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*/
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var Processor = function () {
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/**
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* @param {Array.<Plugin|pluginFunction>|Processor} plugins - PostCSS
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* plugins. See {@link Processor#use} for plugin format.
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*/
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function Processor() {
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var plugins = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
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_classCallCheck(this, Processor);
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/**
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* @member {string} - Current PostCSS version.
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*
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* @example
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* if ( result.processor.version.split('.')[0] !== '5' ) {
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* throw new Error('This plugin works only with PostCSS 5');
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* }
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*/
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this.version = '5.2.15';
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/**
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* @member {pluginFunction[]} - Plugins added to this processor.
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*
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* @example
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* const processor = postcss([autoprefixer, precss]);
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* processor.plugins.length //=> 2
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*/
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this.plugins = this.normalize(plugins);
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}
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/**
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* Adds a plugin to be used as a CSS processor.
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*
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* PostCSS plugin can be in 4 formats:
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* * A plugin created by {@link postcss.plugin} method.
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* * A function. PostCSS will pass the function a @{link Root}
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* as the first argument and current {@link Result} instance
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* as the second.
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* * An object with a `postcss` method. PostCSS will use that method
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* as described in #2.
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* * Another {@link Processor} instance. PostCSS will copy plugins
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* from that instance into this one.
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*
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* Plugins can also be added by passing them as arguments when creating
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* a `postcss` instance (see [`postcss(plugins)`]).
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*
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* Asynchronous plugins should return a `Promise` instance.
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*
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* @param {Plugin|pluginFunction|Processor} plugin - PostCSS plugin
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* or {@link Processor}
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* with plugins
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*
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* @example
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* const processor = postcss()
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* .use(autoprefixer)
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* .use(precss);
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*
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* @return {Processes} current processor to make methods chain
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*/
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Processor.prototype.use = function use(plugin) {
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this.plugins = this.plugins.concat(this.normalize([plugin]));
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return this;
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};
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/**
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* Parses source CSS and returns a {@link LazyResult} Promise proxy.
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* Because some plugins can be asynchronous it doesn’t make
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* any transformations. Transformations will be applied
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* in the {@link LazyResult} methods.
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*
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* @param {string|toString|Result} css - String with input CSS or
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* any object with a `toString()`
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* method, like a Buffer.
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* Optionally, send a {@link Result}
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* instance and the processor will
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* take the {@link Root} from it.
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* @param {processOptions} [opts] - options
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*
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* @return {LazyResult} Promise proxy
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*
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* @example
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* processor.process(css, { from: 'a.css', to: 'a.out.css' })
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* .then(result => {
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* console.log(result.css);
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* });
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*/
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Processor.prototype.process = function process(css) {
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var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
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return new _lazyResult2.default(this, css, opts);
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};
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Processor.prototype.normalize = function normalize(plugins) {
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var normalized = [];
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for (var _iterator = plugins, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
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var _ref;
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if (_isArray) {
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if (_i >= _iterator.length) break;
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_ref = _iterator[_i++];
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} else {
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_i = _iterator.next();
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if (_i.done) break;
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_ref = _i.value;
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}
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var i = _ref;
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if (i.postcss) i = i.postcss;
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if ((typeof i === 'undefined' ? 'undefined' : _typeof(i)) === 'object' && Array.isArray(i.plugins)) {
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normalized = normalized.concat(i.plugins);
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} else if (typeof i === 'function') {
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normalized.push(i);
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} else if ((typeof i === 'undefined' ? 'undefined' : _typeof(i)) === 'object' && (i.parse || i.stringify)) {
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throw new Error('PostCSS syntaxes cannot be used as plugins. ' + 'Instead, please use one of the ' + 'syntax/parser/stringifier options as ' + 'outlined in your PostCSS ' + 'runner documentation.');
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} else {
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throw new Error(i + ' is not a PostCSS plugin');
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}
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}
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return normalized;
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};
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return Processor;
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}();
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exports.default = Processor;
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/**
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* @callback builder
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* @param {string} part - part of generated CSS connected to this node
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* @param {Node} node - AST node
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* @param {"start"|"end"} [type] - node’s part type
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*/
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/**
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* @callback parser
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*
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* @param {string|toString} css - string with input CSS or any object
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* with toString() method, like a Buffer
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* @param {processOptions} [opts] - options with only `from` and `map` keys
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*
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* @return {Root} PostCSS AST
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*/
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/**
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* @callback stringifier
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*
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* @param {Node} node - start node for stringifing. Usually {@link Root}.
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* @param {builder} builder - function to concatenate CSS from node’s parts
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* or generate string and source map
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*
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* @return {void}
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*/
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/**
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* @typedef {object} syntax
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* @property {parser} parse - function to generate AST by string
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* @property {stringifier} stringify - function to generate string by AST
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*/
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/**
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* @typedef {object} toString
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* @property {function} toString
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*/
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/**
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* @callback pluginFunction
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* @param {Root} root - parsed input CSS
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* @param {Result} result - result to set warnings or check other plugins
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*/
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/**
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* @typedef {object} Plugin
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* @property {function} postcss - PostCSS plugin function
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*/
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/**
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* @typedef {object} processOptions
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* @property {string} from - the path of the CSS source file.
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* You should always set `from`,
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* because it is used in source map
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* generation and syntax error messages.
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* @property {string} to - the path where you’ll put the output
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* CSS file. You should always set `to`
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* to generate correct source maps.
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* @property {parser} parser - function to generate AST by string
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* @property {stringifier} stringifier - class to generate string by AST
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* @property {syntax} syntax - object with `parse` and `stringify`
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* @property {object} map - source map options
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* @property {boolean} map.inline - does source map should
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* be embedded in the output
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* CSS as a base64-encoded
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* comment
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* @property {string|object|false|function} map.prev - source map content
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* from a previous
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* processing step
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* (for example, Sass).
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* PostCSS will try to find
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* previous map
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* automatically, so you
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* could disable it by
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* `false` value.
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* @property {boolean} map.sourcesContent - does PostCSS should set
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* the origin content to map
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* @property {string|false} map.annotation - does PostCSS should set
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* annotation comment to map
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* @property {string} map.from - override `from` in map’s
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* `sources`
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*/
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module.exports = exports['default'];
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