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