mirror of https://github.com/webpack/webpack.git
431 lines
15 KiB
JavaScript
431 lines
15 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 { SyncWaterfallHook } = require("tapable");
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const Compilation = require("../Compilation");
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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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const chunkHasJs = require("../javascript/JavascriptModulesPlugin").chunkHasJs;
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const { getInitialChunkIds } = require("../javascript/StartupHelpers");
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const compileBooleanMatcher = require("../util/compileBooleanMatcher");
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/** @typedef {import("../Chunk")} Chunk */
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/**
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* @typedef {Object} JsonpCompilationPluginHooks
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* @property {SyncWaterfallHook<[string, Chunk]>} linkPreload
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* @property {SyncWaterfallHook<[string, Chunk]>} linkPrefetch
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*/
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/** @type {WeakMap<Compilation, JsonpCompilationPluginHooks>} */
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const compilationHooksMap = new WeakMap();
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class JsonpChunkLoadingRuntimeModule extends RuntimeModule {
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/**
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* @param {Compilation} compilation the compilation
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* @returns {JsonpCompilationPluginHooks} hooks
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*/
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static getCompilationHooks(compilation) {
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if (!(compilation instanceof Compilation)) {
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throw new TypeError(
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"The 'compilation' argument must be an instance of Compilation"
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);
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}
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let hooks = compilationHooksMap.get(compilation);
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if (hooks === undefined) {
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hooks = {
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linkPreload: new SyncWaterfallHook(["source", "chunk"]),
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linkPrefetch: new SyncWaterfallHook(["source", "chunk"])
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};
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compilationHooksMap.set(compilation, hooks);
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}
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return hooks;
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}
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constructor(runtimeRequirements) {
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super("jsonp chunk loading", RuntimeModule.STAGE_ATTACH);
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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 { compilation, chunk } = this;
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const {
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runtimeTemplate,
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chunkGraph,
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outputOptions: {
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globalObject,
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chunkLoadingGlobal,
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hotUpdateGlobal,
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crossOriginLoading,
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scriptType
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}
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} = compilation;
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const {
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linkPreload,
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linkPrefetch
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} = JsonpChunkLoadingRuntimeModule.getCompilationHooks(compilation);
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const fn = RuntimeGlobals.ensureChunkHandlers;
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const withBaseURI = this._runtimeRequirements.has(RuntimeGlobals.baseURI);
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const withLoading = this._runtimeRequirements.has(
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RuntimeGlobals.ensureChunkHandlers
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);
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const withCallback = this._runtimeRequirements.has(
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RuntimeGlobals.chunkCallback
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);
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const withOnChunkLoad = this._runtimeRequirements.has(
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RuntimeGlobals.onChunksLoaded
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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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const withPrefetch = this._runtimeRequirements.has(
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RuntimeGlobals.prefetchChunkHandlers
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);
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const withPreload = this._runtimeRequirements.has(
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RuntimeGlobals.preloadChunkHandlers
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);
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const chunkLoadingGlobalExpr = `${globalObject}[${JSON.stringify(
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chunkLoadingGlobal
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)}]`;
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const conditionMap = chunkGraph.getChunkConditionMap(chunk, chunkHasJs);
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const hasJsMatcher = compileBooleanMatcher(conditionMap);
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const initialChunkIds = getInitialChunkIds(chunk, chunkGraph);
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return Template.asString([
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withBaseURI
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? Template.asString([
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`${RuntimeGlobals.baseURI} = document.baseURI || self.location.href;`
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])
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: "// no baseURI",
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"",
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"// object to store loaded and loading chunks",
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"// undefined = chunk not loaded, null = chunk preloaded/prefetched",
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"// [resolve, reject, Promise] = chunk loading, 0 = chunk loaded",
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"var installedChunks = {",
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Template.indent(
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Array.from(initialChunkIds, id => `${JSON.stringify(id)}: 0`).join(
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",\n"
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)
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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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`${fn}.j = ${runtimeTemplate.basicFunction(
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"chunkId, promises",
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hasJsMatcher !== false
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? Template.indent([
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"// JSONP chunk loading for javascript",
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`var installedChunkData = ${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) ? installedChunks[chunkId] : undefined;`,
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'if(installedChunkData !== 0) { // 0 means "already installed".',
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Template.indent([
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"",
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'// a Promise means "currently loading".',
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"if(installedChunkData) {",
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Template.indent([
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"promises.push(installedChunkData[2]);"
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]),
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"} else {",
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Template.indent([
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hasJsMatcher === true
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? "if(true) { // all chunks have JS"
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: `if(${hasJsMatcher("chunkId")}) {`,
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Template.indent([
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"// setup Promise in chunk cache",
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`var promise = new Promise(${runtimeTemplate.basicFunction(
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"resolve, reject",
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[
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`installedChunkData = installedChunks[chunkId] = [resolve, reject];`
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]
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)});`,
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"promises.push(installedChunkData[2] = promise);",
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"",
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"// start chunk loading",
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`var url = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkScriptFilename}(chunkId);`,
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"// create error before stack unwound to get useful stacktrace later",
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"var error = new Error();",
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`var loadingEnded = ${runtimeTemplate.basicFunction(
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"event",
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[
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`if(${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId)) {`,
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Template.indent([
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"installedChunkData = installedChunks[chunkId];",
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"if(installedChunkData !== 0) installedChunks[chunkId] = undefined;",
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"if(installedChunkData) {",
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Template.indent([
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"var errorType = event && (event.type === 'load' ? 'missing' : event.type);",
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"var realSrc = event && event.target && event.target.src;",
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"error.message = 'Loading chunk ' + chunkId + ' failed.\\n(' + errorType + ': ' + realSrc + ')';",
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"error.name = 'ChunkLoadError';",
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"error.type = errorType;",
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"error.request = realSrc;",
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"installedChunkData[1](error);"
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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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`${RuntimeGlobals.loadScript}(url, loadingEnded, "chunk-" + chunkId, chunkId);`
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]),
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"} else installedChunks[chunkId] = 0;"
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]),
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"}"
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]),
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"}"
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])
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: Template.indent(["installedChunks[chunkId] = 0;"])
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)};`
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])
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: "// no chunk on demand loading",
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"",
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withPrefetch && hasJsMatcher !== false
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? `${
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RuntimeGlobals.prefetchChunkHandlers
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}.j = ${runtimeTemplate.basicFunction("chunkId", [
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`if((!${
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RuntimeGlobals.hasOwnProperty
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}(installedChunks, chunkId) || installedChunks[chunkId] === undefined) && ${
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hasJsMatcher === true ? "true" : hasJsMatcher("chunkId")
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}) {`,
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Template.indent([
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"installedChunks[chunkId] = null;",
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linkPrefetch.call(
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Template.asString([
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"var link = document.createElement('link');",
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crossOriginLoading
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? `link.crossOrigin = ${JSON.stringify(
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crossOriginLoading
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)};`
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: "",
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`if (${RuntimeGlobals.scriptNonce}) {`,
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Template.indent(
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`link.setAttribute("nonce", ${RuntimeGlobals.scriptNonce});`
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),
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"}",
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'link.rel = "prefetch";',
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'link.as = "script";',
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`link.href = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkScriptFilename}(chunkId);`
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]),
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chunk
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),
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"document.head.appendChild(link);"
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]),
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"}"
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])};`
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: "// no prefetching",
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"",
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withPreload && hasJsMatcher !== false
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? `${
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RuntimeGlobals.preloadChunkHandlers
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}.j = ${runtimeTemplate.basicFunction("chunkId", [
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`if((!${
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RuntimeGlobals.hasOwnProperty
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}(installedChunks, chunkId) || installedChunks[chunkId] === undefined) && ${
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hasJsMatcher === true ? "true" : hasJsMatcher("chunkId")
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}) {`,
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Template.indent([
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"installedChunks[chunkId] = null;",
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linkPreload.call(
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Template.asString([
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"var link = document.createElement('link');",
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scriptType
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? `link.type = ${JSON.stringify(scriptType)};`
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: "",
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"link.charset = 'utf-8';",
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`if (${RuntimeGlobals.scriptNonce}) {`,
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Template.indent(
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`link.setAttribute("nonce", ${RuntimeGlobals.scriptNonce});`
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),
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"}",
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'link.rel = "preload";',
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'link.as = "script";',
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`link.href = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkScriptFilename}(chunkId);`,
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crossOriginLoading
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? Template.asString([
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"if (link.href.indexOf(window.location.origin + '/') !== 0) {",
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Template.indent(
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`link.crossOrigin = ${JSON.stringify(
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crossOriginLoading
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)};`
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),
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"}"
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])
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: ""
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]),
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chunk
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),
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"document.head.appendChild(link);"
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]),
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"}"
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])};`
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: "// no preloaded",
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"",
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withHmr
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? Template.asString([
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"var currentUpdatedModulesList;",
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"var waitingUpdateResolves = {};",
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"function loadUpdateChunk(chunkId) {",
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Template.indent([
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`return new Promise(${runtimeTemplate.basicFunction(
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"resolve, reject",
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[
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"waitingUpdateResolves[chunkId] = resolve;",
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"// start update chunk loading",
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`var url = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkUpdateScriptFilename}(chunkId);`,
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"// create error before stack unwound to get useful stacktrace later",
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"var error = new Error();",
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`var loadingEnded = ${runtimeTemplate.basicFunction("event", [
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"if(waitingUpdateResolves[chunkId]) {",
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Template.indent([
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"waitingUpdateResolves[chunkId] = undefined",
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"var errorType = event && (event.type === 'load' ? 'missing' : event.type);",
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"var realSrc = event && event.target && event.target.src;",
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"error.message = 'Loading hot update chunk ' + chunkId + ' failed.\\n(' + errorType + ': ' + realSrc + ')';",
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"error.name = 'ChunkLoadError';",
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"error.type = errorType;",
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"error.request = realSrc;",
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"reject(error);"
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]),
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"}"
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])};`,
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`${RuntimeGlobals.loadScript}(url, loadingEnded);`
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]
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)});`
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]),
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"}",
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"",
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`${globalObject}[${JSON.stringify(
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hotUpdateGlobal
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)}] = ${runtimeTemplate.basicFunction(
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"chunkId, moreModules, runtime",
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[
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"for(var moduleId in moreModules) {",
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Template.indent([
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`if(${RuntimeGlobals.hasOwnProperty}(moreModules, moduleId)) {`,
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Template.indent([
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"currentUpdate[moduleId] = moreModules[moduleId];",
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"if(currentUpdatedModulesList) currentUpdatedModulesList.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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"if(waitingUpdateResolves[chunkId]) {",
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Template.indent([
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"waitingUpdateResolves[chunkId]();",
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"waitingUpdateResolves[chunkId] = undefined;"
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]),
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"}"
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]
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)};`,
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"",
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Template.getFunctionContent(
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require("../hmr/JavascriptHotModuleReplacement.runtime.js")
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)
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.replace(/\$key\$/g, "jsonp")
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.replace(/\$installedChunks\$/g, "installedChunks")
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.replace(/\$loadUpdateChunk\$/g, "loadUpdateChunk")
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.replace(/\$moduleCache\$/g, RuntimeGlobals.moduleCache)
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.replace(/\$moduleFactories\$/g, RuntimeGlobals.moduleFactories)
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.replace(
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/\$ensureChunkHandlers\$/g,
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RuntimeGlobals.ensureChunkHandlers
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)
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.replace(/\$hasOwnProperty\$/g, RuntimeGlobals.hasOwnProperty)
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.replace(/\$hmrModuleData\$/g, RuntimeGlobals.hmrModuleData)
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.replace(
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/\$hmrDownloadUpdateHandlers\$/g,
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RuntimeGlobals.hmrDownloadUpdateHandlers
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)
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.replace(
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/\$hmrInvalidateModuleHandlers\$/g,
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RuntimeGlobals.hmrInvalidateModuleHandlers
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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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`${
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RuntimeGlobals.hmrDownloadManifest
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} = ${runtimeTemplate.basicFunction("", [
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'if (typeof fetch === "undefined") throw new Error("No browser support: need fetch API");',
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`return fetch(${RuntimeGlobals.publicPath} + ${
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RuntimeGlobals.getUpdateManifestFilename
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}()).then(${runtimeTemplate.basicFunction("response", [
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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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: "// no HMR manifest",
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"",
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withOnChunkLoad
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? `${
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RuntimeGlobals.onChunksLoaded
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}.j = ${runtimeTemplate.returningFunction(
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"installedChunks[chunkId] === 0",
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"chunkId"
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)};`
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: "// no on chunks loaded",
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"",
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withCallback || withLoading
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? Template.asString([
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"// install a JSONP callback for chunk loading",
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`var webpackJsonpCallback = ${runtimeTemplate.basicFunction(
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"parentChunkLoadingFunction, data",
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[
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runtimeTemplate.destructureArray(
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["chunkIds", "moreModules", "runtime"],
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"data"
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),
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'// add "moreModules" to the modules object,',
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'// then flag all "chunkIds" as loaded and fire callback',
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"var moduleId, chunkId, i = 0;",
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"for(moduleId in moreModules) {",
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Template.indent([
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`if(${RuntimeGlobals.hasOwnProperty}(moreModules, moduleId)) {`,
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Template.indent(
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`${RuntimeGlobals.moduleFactories}[moduleId] = moreModules[moduleId];`
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),
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"}"
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]),
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"}",
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"if(runtime) runtime(__webpack_require__);",
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"if(parentChunkLoadingFunction) parentChunkLoadingFunction(data);",
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"for(;i < chunkIds.length; i++) {",
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Template.indent([
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"chunkId = chunkIds[i];",
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`if(${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) && installedChunks[chunkId]) {`,
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Template.indent("installedChunks[chunkId][0]();"),
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"}",
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"installedChunks[chunkIds[i]] = 0;"
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]),
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"}",
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withOnChunkLoad ? `${RuntimeGlobals.onChunksLoaded}();` : ""
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]
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)}`,
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"",
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`var chunkLoadingGlobal = ${chunkLoadingGlobalExpr} = ${chunkLoadingGlobalExpr} || [];`,
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"chunkLoadingGlobal.forEach(webpackJsonpCallback.bind(null, 0));",
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"chunkLoadingGlobal.push = webpackJsonpCallback.bind(null, chunkLoadingGlobal.push.bind(chunkLoadingGlobal));"
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])
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: "// no jsonp function"
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]);
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}
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}
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module.exports = JsonpChunkLoadingRuntimeModule;
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