180 lines
5.8 KiB
JavaScript
180 lines
5.8 KiB
JavaScript
/*
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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 ImportScriptsChunkLoadingRuntimeModule extends RuntimeModule {
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constructor(runtimeRequirements) {
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super("importScripts chunk loading", 10);
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this.runtimeRequirements = runtimeRequirements;
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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 {
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chunk,
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compilation: {
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outputOptions: { globalObject, chunkCallbackName, hotUpdateFunction }
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}
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} = this;
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const fn = RuntimeGlobals.ensureChunkHandlers;
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const withLoading = this.runtimeRequirements.has(
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RuntimeGlobals.ensureChunkHandlers
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);
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const withHmr = this.runtimeRequirements.has(
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RuntimeGlobals.hmrDownloadUpdateHandlers
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);
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const withHmrManifest = this.runtimeRequirements.has(
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RuntimeGlobals.hmrDownloadManifest
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);
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return Template.asString([
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"// object to store loaded chunks",
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'// "1" means "already loaded"',
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"var installedChunks = {",
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Template.indent(
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chunk.ids.map(id => `${JSON.stringify(id)}: 1`).join(",\n")
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),
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"};",
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"",
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withLoading
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? Template.asString([
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"// importScripts chunk loading",
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`${fn}.i = function(chunkId, promises) {`,
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Template.indent([
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'// "1" is the signal for "already loaded"',
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"if(!installedChunks[chunkId]) {",
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Template.indent([
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`${globalObject}[${JSON.stringify(
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chunkCallbackName
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)}] = function webpackChunkCallback(chunkIds, moreModules, runtime) {`,
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Template.indent([
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"for(var moduleId in moreModules) {",
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Template.indent([
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`if(${RuntimeGlobals.hasOwnProperty}(moreModules, moduleId)) {`,
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Template.indent(
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`${RuntimeGlobals.moduleFactories}[moduleId] = moreModules[moduleId];`
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),
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"}"
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]),
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"}",
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"if(runtime) runtime(__webpack_require__);",
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"while(chunkIds.length)",
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Template.indent("installedChunks[chunkIds.pop()] = 1;")
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]),
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"};",
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`importScripts(${RuntimeGlobals.getChunkScriptFilename}(chunkId));`,
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"",
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withHmr
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? "if(currentUpdateChunks && currentUpdateChunks[chunkId]) loadUpdateChunk(chunkId);"
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: "// no HMR"
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]),
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"}"
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]),
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"};"
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])
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: "// no chunk loading",
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"",
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withHmr
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? Template.asString([
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"var currentUpdateChunks;",
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"var currentUpdate;",
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"var currentUpdateRuntime;",
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"function loadUpdateChunk(chunkId, updatedModulesList) {",
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Template.indent([
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"var success = false;",
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`${globalObject}[${JSON.stringify(
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hotUpdateFunction
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)}] = function(moreModules, runtime) {`,
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Template.indent([
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"for(var moduleId in moreModules) {",
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Template.indent([
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`if(${RuntimeGlobals.hasOwnProperty}(moreModules, moduleId)) {`,
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Template.indent([
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"currentUpdate[moduleId] = moreModules[moduleId];",
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"if(updatedModulesList) updatedModulesList.push(moduleId);"
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]),
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"}"
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]),
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"}",
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"if(runtime) currentUpdateRuntime.push(runtime);",
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"success = true;"
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]),
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"};",
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"// start update chunk loading",
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`importScripts(${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkUpdateScriptFilename}(chunkId));`,
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'if(!success) throw new Error("Loading update chunk failed for unknown reason");'
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]),
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"}",
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"",
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`${RuntimeGlobals.hmrDownloadUpdateHandlers}.jsonp = function(chunkIds, removedChunks, removedModules, promises, applyHandlers, updatedModulesList) {`,
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Template.indent([
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"applyHandlers.push(function(options) {",
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Template.indent([
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"currentUpdateChunks = undefined;",
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Template.getFunctionContent(
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require("../hmr/JavascriptHotModuleReplacement.runtime.js")
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)
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.replace(/\$options\$/g, "options")
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.replace(/\$updateModuleFactories\$/g, "currentUpdate")
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.replace(/\$updateRuntimeModules\$/g, "currentUpdateRuntime")
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.replace(/\$moduleCache\$/g, RuntimeGlobals.moduleCache)
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.replace(/\$hmrModuleData\$/g, RuntimeGlobals.hmrModuleData)
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.replace(
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/\$moduleFactories\$/g,
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RuntimeGlobals.moduleFactories
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)
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.replace(
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/\/\/ \$dispose\$/g,
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Template.asString([
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"removedChunks.forEach(function(chunkId) { delete installedChunks[chunkId]; });"
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])
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)
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]),
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"});",
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"currentUpdateChunks = {};",
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"currentUpdate = removedModules.reduce(function(obj, key) { obj[key] = false; return obj; }, {});",
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"currentUpdateRuntime = [];",
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"chunkIds.forEach(function(chunkId) {",
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Template.indent([
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"if(installedChunks[chunkId] !== undefined) {",
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Template.indent([
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"promises.push(loadUpdateChunk(chunkId, updatedModulesList));"
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]),
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"}",
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"currentUpdateChunks[chunkId] = true;"
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]),
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"});"
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]),
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"}"
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])
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: "// no HMR",
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"",
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withHmrManifest
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? Template.asString([
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`${RuntimeGlobals.hmrDownloadManifest} = function() {`,
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Template.indent([
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'if (typeof fetch === "undefined") throw new Error("No browser support: need fetch API");',
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`return fetch(${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getUpdateManifestFilename}()).then(function(response) {`,
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Template.indent([
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"if(response.status === 404) return; // no update available",
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'if(!response.ok) throw new Error("Failed to fetch update manifest " + response.statusText);',
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"return response.json();"
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]),
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"});"
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]),
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"};"
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])
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: "// no HMR manifest"
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]);
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}
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}
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module.exports = ImportScriptsChunkLoadingRuntimeModule;
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