mirror of https://github.com/webpack/webpack.git
507 lines
17 KiB
JavaScript
507 lines
17 KiB
JavaScript
/*
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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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"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 compileBooleanMatcher = require("../util/compileBooleanMatcher");
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const { chunkHasCss } = require("./CssModulesPlugin");
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/** @typedef {import("../../declarations/WebpackOptions").Environment} Environment */
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/** @typedef {import("../Chunk")} Chunk */
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/** @typedef {import("../ChunkGraph")} ChunkGraph */
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/** @typedef {import("../Compilation").RuntimeRequirementsContext} RuntimeRequirementsContext */
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/** @typedef {import("../Module").ReadOnlyRuntimeRequirements} ReadOnlyRuntimeRequirements */
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/**
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* @typedef {object} CssLoadingRuntimeModulePluginHooks
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* @property {SyncWaterfallHook<[string, Chunk]>} createStylesheet
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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, CssLoadingRuntimeModulePluginHooks>} */
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const compilationHooksMap = new WeakMap();
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class CssLoadingRuntimeModule extends RuntimeModule {
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/**
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* @param {Compilation} compilation the compilation
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* @returns {CssLoadingRuntimeModulePluginHooks} 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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createStylesheet: new SyncWaterfallHook(["source", "chunk"]),
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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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/**
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* @param {ReadOnlyRuntimeRequirements} runtimeRequirements runtime requirements
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*/
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constructor(runtimeRequirements) {
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super("css loading", 10);
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this._runtimeRequirements = runtimeRequirements;
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}
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/**
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* @returns {string | null} runtime code
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*/
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generate() {
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const { _runtimeRequirements } = this;
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const compilation = /** @type {Compilation} */ (this.compilation);
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const chunk = /** @type {Chunk} */ (this.chunk);
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const {
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chunkGraph,
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runtimeTemplate,
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outputOptions: {
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crossOriginLoading,
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uniqueName,
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chunkLoadTimeout: loadTimeout,
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charset
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}
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} = compilation;
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const fn = RuntimeGlobals.ensureChunkHandlers;
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const conditionMap = chunkGraph.getChunkConditionMap(
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/** @type {Chunk} */ (chunk),
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/**
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* @param {Chunk} chunk the chunk
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* @param {ChunkGraph} chunkGraph the chunk graph
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* @returns {boolean} true, if the chunk has css
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*/
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(chunk, chunkGraph) =>
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Boolean(chunkGraph.getChunkModulesIterableBySourceType(chunk, "css"))
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);
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const hasCssMatcher = compileBooleanMatcher(conditionMap);
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const withLoading =
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_runtimeRequirements.has(RuntimeGlobals.ensureChunkHandlers) &&
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hasCssMatcher !== false;
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/** @type {boolean} */
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const withHmr = _runtimeRequirements.has(
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RuntimeGlobals.hmrDownloadUpdateHandlers
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);
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/** @type {Set<number | string | null>} */
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const initialChunkIds = new Set();
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for (const c of /** @type {Chunk} */ (chunk).getAllInitialChunks()) {
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if (chunkHasCss(c, chunkGraph)) {
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initialChunkIds.add(c.id);
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}
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}
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if (!withLoading && !withHmr) {
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return null;
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}
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const environment =
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/** @type {Environment} */
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(compilation.outputOptions.environment);
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const isNeutralPlatform = runtimeTemplate.isNeutralPlatform();
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const withPrefetch =
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this._runtimeRequirements.has(RuntimeGlobals.prefetchChunkHandlers) &&
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(environment.document || isNeutralPlatform) &&
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chunk.hasChildByOrder(chunkGraph, "prefetch", true, chunkHasCss);
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const withPreload =
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this._runtimeRequirements.has(RuntimeGlobals.preloadChunkHandlers) &&
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(environment.document || isNeutralPlatform) &&
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chunk.hasChildByOrder(chunkGraph, "preload", true, chunkHasCss);
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const { linkPreload, linkPrefetch } =
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CssLoadingRuntimeModule.getCompilationHooks(compilation);
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const withFetchPriority = _runtimeRequirements.has(
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RuntimeGlobals.hasFetchPriority
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);
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const { createStylesheet } =
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CssLoadingRuntimeModule.getCompilationHooks(compilation);
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const stateExpression = withHmr
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? `${RuntimeGlobals.hmrRuntimeStatePrefix}_css`
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: undefined;
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const code = Template.asString([
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"link = document.createElement('link');",
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charset ? "link.charset = 'utf-8';" : "",
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`if (${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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uniqueName
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? 'link.setAttribute("data-webpack", uniqueName + ":" + key);'
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: "",
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withFetchPriority
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? Template.asString([
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"if(fetchPriority) {",
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Template.indent(
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'link.setAttribute("fetchpriority", fetchPriority);'
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),
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"}"
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])
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: "",
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"link.setAttribute(loadingAttribute, 1);",
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'link.rel = "stylesheet";',
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"link.href = url;",
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crossOriginLoading
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? crossOriginLoading === "use-credentials"
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? 'link.crossOrigin = "use-credentials";'
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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(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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return Template.asString([
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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 = ${
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stateExpression ? `${stateExpression} = ${stateExpression} || ` : ""
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}{`,
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Template.indent(
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Array.from(initialChunkIds, (id) => `${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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uniqueName
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? `var uniqueName = ${JSON.stringify(
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runtimeTemplate.outputOptions.uniqueName
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)};`
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: "// data-webpack is not used as build has no uniqueName",
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withLoading || withHmr
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? Template.asString([
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'var loadingAttribute = "data-webpack-loading";',
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`var loadStylesheet = ${runtimeTemplate.basicFunction(
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`chunkId, url, done${
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withFetchPriority ? ", fetchPriority" : ""
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}${withHmr ? ", hmr" : ""}`,
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[
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'var link, needAttach, key = "chunk-" + chunkId;',
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withHmr ? "if(!hmr) {" : "",
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'var links = document.getElementsByTagName("link");',
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"for(var i = 0; i < links.length; i++) {",
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Template.indent([
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"var l = links[i];",
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`if(l.rel == "stylesheet" && (${
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withHmr
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? 'l.href.startsWith(url) || l.getAttribute("href").startsWith(url)'
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: 'l.href == url || l.getAttribute("href") == url'
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}${
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uniqueName
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? ' || l.getAttribute("data-webpack") == uniqueName + ":" + key'
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: ""
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})) { link = l; break; }`
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]),
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"}",
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"if(!done) return link;",
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withHmr ? "}" : "",
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"if(!link) {",
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Template.indent([
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"needAttach = true;",
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createStylesheet.call(code, /** @type {Chunk} */ (this.chunk))
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]),
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"}",
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`var onLinkComplete = ${runtimeTemplate.basicFunction(
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"prev, event",
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Template.asString([
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"link.onerror = link.onload = null;",
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"link.removeAttribute(loadingAttribute);",
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"clearTimeout(timeout);",
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'if(event && event.type != "load") link.parentNode.removeChild(link)',
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"done(event);",
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"if(prev) return prev(event);"
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])
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)};`,
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"if(link.getAttribute(loadingAttribute)) {",
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Template.indent([
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`var timeout = setTimeout(onLinkComplete.bind(null, undefined, { type: 'timeout', target: link }), ${loadTimeout});`,
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"link.onerror = onLinkComplete.bind(null, link.onerror);",
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"link.onload = onLinkComplete.bind(null, link.onload);"
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]),
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"} else onLinkComplete(undefined, { type: 'load', target: link });", // We assume any existing stylesheet is render blocking
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withHmr && withFetchPriority
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? 'if (hmr && hmr.getAttribute("fetchpriority")) link.setAttribute("fetchpriority", hmr.getAttribute("fetchpriority"));'
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: "",
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withHmr ? "hmr ? document.head.insertBefore(link, hmr) :" : "",
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"needAttach && document.head.appendChild(link);",
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"return link;"
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]
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)};`
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])
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: "",
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withLoading
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? Template.asString([
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`${fn}.css = ${runtimeTemplate.basicFunction(
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`chunkId, promises${withFetchPriority ? " , fetchPriority" : ""}`,
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[
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"// css chunk loading",
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`var installedChunkData = ${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) ? installedChunks[chunkId] : undefined;`,
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'if(installedChunkData !== 0) { // 0 means "already installed".',
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Template.indent([
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"",
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'// a Promise means "currently loading".',
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"if(installedChunkData) {",
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Template.indent(["promises.push(installedChunkData[2]);"]),
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"} else {",
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Template.indent([
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hasCssMatcher === true
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? "if(true) { // all chunks have CSS"
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: `if(${hasCssMatcher("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.expressionFunction(
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"installedChunkData = installedChunks[chunkId] = [resolve, reject]",
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"resolve, reject"
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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.getChunkCssFilename}(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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'if(event.type !== "load") {',
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Template.indent([
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"var errorType = event && event.type;",
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"var realHref = event && event.target && event.target.href;",
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"error.message = 'Loading css chunk ' + chunkId + ' failed.\\n(' + errorType + ': ' + realHref + ')';",
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"error.name = 'ChunkLoadError';",
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"error.type = errorType;",
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"error.request = realHref;",
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"installedChunkData[1](error);"
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]),
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"} else {",
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Template.indent([
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"installedChunks[chunkId] = 0;",
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"installedChunkData[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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"}"
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]
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)};`,
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isNeutralPlatform
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? "if (typeof document !== 'undefined') {"
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: "",
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Template.indent([
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`loadStylesheet(chunkId, url, loadingEnded${
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withFetchPriority ? ", fetchPriority" : ""
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});`
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]),
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isNeutralPlatform
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? "} else { loadingEnded({ type: 'load' }); }"
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: ""
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]),
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"} else installedChunks[chunkId] = 0;"
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]),
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"}"
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]),
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"}"
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]
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)};`
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])
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: "// no chunk loading",
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"",
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withPrefetch && hasCssMatcher !== false
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? `${
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RuntimeGlobals.prefetchChunkHandlers
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}.s = ${runtimeTemplate.basicFunction("chunkId", [
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`if((!${
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RuntimeGlobals.hasOwnProperty
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}(installedChunks, chunkId) || installedChunks[chunkId] === undefined) && ${
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hasCssMatcher === true ? "true" : hasCssMatcher("chunkId")
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}) {`,
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Template.indent([
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"installedChunks[chunkId] = null;",
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isNeutralPlatform
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? "if (typeof document === 'undefined') return;"
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: "",
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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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charset ? "link.charset = 'utf-8';" : "",
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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 = "style";',
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`link.href = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkCssFilename}(chunkId);`
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]),
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chunk
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),
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"document.head.appendChild(link);"
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]),
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"}"
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])};`
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: "// no prefetching",
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"",
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withPreload && hasCssMatcher !== false
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? `${
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RuntimeGlobals.preloadChunkHandlers
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}.s = ${runtimeTemplate.basicFunction("chunkId", [
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`if((!${
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RuntimeGlobals.hasOwnProperty
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}(installedChunks, chunkId) || installedChunks[chunkId] === undefined) && ${
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hasCssMatcher === true ? "true" : hasCssMatcher("chunkId")
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}) {`,
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Template.indent([
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"installedChunks[chunkId] = null;",
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isNeutralPlatform
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? "if (typeof document === 'undefined') return;"
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: "",
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linkPreload.call(
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Template.asString([
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"var link = document.createElement('link');",
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charset ? "link.charset = 'utf-8';" : "",
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`if (${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 = "style";',
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`link.href = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkCssFilename}(chunkId);`,
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crossOriginLoading
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? crossOriginLoading === "use-credentials"
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? 'link.crossOrigin = "use-credentials";'
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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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withHmr
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? Template.asString([
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"var oldTags = [];",
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"var newTags = [];",
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`var applyHandler = ${runtimeTemplate.basicFunction("options", [
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`return { dispose: ${runtimeTemplate.basicFunction("", [
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"while(oldTags.length) {",
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Template.indent([
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"var oldTag = oldTags.pop();",
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"if(oldTag.parentNode) oldTag.parentNode.removeChild(oldTag);"
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]),
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"}"
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])}, apply: ${runtimeTemplate.basicFunction("", [
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"while(newTags.length) {",
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Template.indent([
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"var newTag = newTags.pop();",
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"newTag.sheet.disabled = false"
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]),
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"}"
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])} };`
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])}`,
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`var cssTextKey = ${runtimeTemplate.returningFunction(
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`Array.from(link.sheet.cssRules, ${runtimeTemplate.returningFunction(
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"r.cssText",
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"r"
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)}).join()`,
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"link"
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)};`,
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`${
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RuntimeGlobals.hmrDownloadUpdateHandlers
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}.css = ${runtimeTemplate.basicFunction(
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"chunkIds, removedChunks, removedModules, promises, applyHandlers, updatedModulesList",
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[
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isNeutralPlatform
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? "if (typeof document === 'undefined') return;"
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: "",
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"applyHandlers.push(applyHandler);",
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`chunkIds.forEach(${runtimeTemplate.basicFunction("chunkId", [
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`var filename = ${RuntimeGlobals.getChunkCssFilename}(chunkId);`,
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`var url = ${RuntimeGlobals.publicPath} + filename;`,
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"var oldTag = loadStylesheet(chunkId, url);",
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"if(!oldTag) return;",
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`promises.push(new Promise(${runtimeTemplate.basicFunction(
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"resolve, reject",
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[
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`var link = loadStylesheet(chunkId, url + (url.indexOf("?") < 0 ? "?" : "&") + "hmr=" + Date.now(), ${runtimeTemplate.basicFunction(
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"event",
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[
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'if(event.type !== "load") {',
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Template.indent([
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"var errorType = event && event.type;",
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"var realHref = event && event.target && event.target.href;",
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"error.message = 'Loading css hot update chunk ' + chunkId + ' failed.\\n(' + errorType + ': ' + realHref + ')';",
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"error.name = 'ChunkLoadError';",
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"error.type = errorType;",
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"error.request = realHref;",
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"reject(error);"
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]),
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"} else {",
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Template.indent([
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"try { if(cssTextKey(oldTag) == cssTextKey(link)) { if(link.parentNode) link.parentNode.removeChild(link); return resolve(); } } catch(e) {}",
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"link.sheet.disabled = true;",
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"oldTags.push(oldTag);",
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"newTags.push(link);",
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"resolve();"
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]),
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"}"
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]
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)}, ${withFetchPriority ? "undefined," : ""} oldTag);`
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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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: "// no hmr"
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]);
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}
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}
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module.exports = CssLoadingRuntimeModule;
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