aaac7fed
 liuqimichale
add
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
var path = require('path');
var loaderUtils = require("loader-utils");
var validateOptions = require('schema-utils');
module.exports = function () {};
module.exports.pitch = function (request) {
if (this.cacheable) this.cacheable();
var options = loaderUtils.getOptions(this) || {};
validateOptions(require('./options.json'), options, 'Style Loader (Useable)');
options.hmr = typeof options.hmr === 'undefined' ? true : options.hmr;
// The variable is needed, because the function should be inlined.
// If is just stored it in options, JSON.stringify will quote
// the function and it would be just a string at runtime
var insertInto;
if (typeof options.insertInto === "function") {
insertInto = options.insertInto.toString();
}
// We need to check if it a string, or variable will be "undefined"
// and the loader crashes
if (typeof options.insertInto === "string") {
insertInto = '"' + options.insertInto + '"';
}
var hmr = [
// Hot Module Replacement
"if(module.hot) {",
" var lastRefs = module.hot.data && module.hot.data.refs || 0;",
"",
" if(lastRefs) {",
" exports.ref();",
" if(!content.locals) {",
" refs = lastRefs;",
" }",
" }",
"",
" if(!content.locals) {",
" module.hot.accept();",
" }",
"",
" module.hot.dispose(function(data) {",
" data.refs = content.locals ? 0 : refs;",
"",
" if(dispose) {",
" dispose();",
" }",
" });",
"}"
].join("\n");
return [
"var refs = 0;",
"var dispose;",
"var content = require(" + loaderUtils.stringifyRequest(this, "!!" + request) + ");",
"var options = " + JSON.stringify(options) + ";",
"options.insertInto = " + insertInto + ";",
"",
"if(typeof content === 'string') content = [[module.id, content, '']];",
// Export CSS Modules
"if(content.locals) exports.locals = content.locals;",
"",
"exports.use = exports.ref = function() {",
" if(!(refs++)) {",
" dispose = require(" + loaderUtils.stringifyRequest(this, "!" + path.join(__dirname, "lib", "addStyles.js")) + ")(content, options);",
" }",
"",
" return exports;",
"};",
"",
"exports.unuse = exports.unref = function() {",
" if(refs > 0 && !(--refs)) {",
" dispose();",
" dispose = null;",
" }",
"};",
options.hmr ? hmr : ""
].join("\n");
};
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