css-base.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
// css base code, injected by the css-loader
module.exports = function(useSourceMap) {
var list = [];
// return the list of modules as css string
list.toString = function toString() {
return this.map(function (item) {
var content = cssWithMappingToString(item, useSourceMap);
if(item[2]) {
return "@media " + item[2] + "{" + content + "}";
} else {
return content;
}
}).join("");
};
// import a list of modules into the list
list.i = function(modules, mediaQuery) {
if(typeof modules === "string")
modules = [[null, modules, ""]];
var alreadyImportedModules = {};
for(var i = 0; i < this.length; i++) {
var id = this[i][0];
if(typeof id === "number")
alreadyImportedModules[id] = true;
}
for(i = 0; i < modules.length; i++) {
var item = modules[i];
// skip already imported module
// this implementation is not 100% perfect for weird media query combinations
// when a module is imported multiple times with different media queries.
// I hope this will never occur (Hey this way we have smaller bundles)
if(typeof item[0] !== "number" || !alreadyImportedModules[item[0]]) {
if(mediaQuery && !item[2]) {
item[2] = mediaQuery;
} else if(mediaQuery) {
item[2] = "(" + item[2] + ") and (" + mediaQuery + ")";
}
list.push(item);
}
}
};
return list;
};
function cssWithMappingToString(item, useSourceMap) {
var content = item[1] || '';
var cssMapping = item[3];
if (!cssMapping) {
return content;
}
if (useSourceMap && typeof btoa === 'function') {
var sourceMapping = toComment(cssMapping);
var sourceURLs = cssMapping.sources.map(function (source) {
return '/*# sourceURL=' + cssMapping.sourceRoot + source + ' */'
});
return [content].concat(sourceURLs).concat([sourceMapping]).join('\n');
}
return [content].join('\n');
}
// Adapted from convert-source-map (MIT)
function toComment(sourceMap) {
// eslint-disable-next-line no-undef
var base64 = btoa(unescape(encodeURIComponent(JSON.stringify(sourceMap))));
var data = 'sourceMappingURL=data:application/json;charset=utf-8;base64,' + base64;
return '/*# ' + data + ' */';
}