mirror of https://github.com/webpack/webpack.git
65 lines
1.6 KiB
JavaScript
65 lines
1.6 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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*/
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"use strict";
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const RuntimeGlobals = require("../RuntimeGlobals");
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const RuntimeModule = require("../RuntimeModule");
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const Template = require("../Template");
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class ReadFileChunkLoadingRuntimeModule extends RuntimeModule {
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constructor(chunk) {
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super("require chunk loading", 10);
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this.chunk = chunk;
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}
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/**
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* @returns {string} runtime code
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*/
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generate() {
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const { chunk } = this;
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const fn = RuntimeGlobals.ensureChunkHandlers;
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return Template.asString([
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"// object to store loaded chunks",
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'// "1" means "loaded", otherwise not loaded yet',
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"var installedChunks = {",
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Template.indent(
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chunk.ids.map(id => `${JSON.stringify(id)}: 1`).join(",\n")
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),
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"};",
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"",
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"// require() chunk loading for javascript",
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`${fn}.push(function(chunkId, promises) {`,
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Template.indent([
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"",
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'// "0" is the signal for "already loaded"',
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"if(!installedChunks[chunkId]) {",
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Template.indent([
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`var chunk = require("./" + ${
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RuntimeGlobals.getChunkScriptFilename
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}(chunkId));`,
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"var moreModules = chunk.modules, chunkIds = chunk.ids;",
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"for(var moduleId in moreModules) {",
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Template.indent([
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"if(Object.prototype.hasOwnProperty.call(moreModules, moduleId)) {",
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Template.indent([
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`${
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RuntimeGlobals.moduleFactories
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}[moduleId] = moreModules[moduleId];`
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]),
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"}"
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]),
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"}",
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"for(var i = 0; i < chunkIds.length; i++)",
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Template.indent("installedChunks[chunkIds[i]] = 1;")
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]),
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"}"
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]),
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"})"
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]);
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}
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}
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module.exports = ReadFileChunkLoadingRuntimeModule;
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