448 lines
15 KiB
JavaScript
448 lines
15 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("../Chunk")} Chunk */
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/**
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* @typedef {Object} JsonpCompilationPluginHooks
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* @property {SyncWaterfallHook<[string, Chunk]>} createStylesheet
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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 CssLoadingRuntimeModule 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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createStylesheet: 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, runtimeOptions) {
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super("css loading", 10);
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this._runtimeRequirements = runtimeRequirements;
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this.runtimeOptions = runtimeOptions;
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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, _runtimeRequirements } = this;
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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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}
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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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chunk,
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(chunk, chunkGraph) =>
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!!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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const withHmr = _runtimeRequirements.has(
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RuntimeGlobals.hmrDownloadUpdateHandlers
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);
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const initialChunkIdsWithCss = new Set();
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const initialChunkIdsWithoutCss = new Set();
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for (const c of chunk.getAllInitialChunks()) {
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(chunkHasCss(c, chunkGraph)
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? initialChunkIdsWithCss
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: initialChunkIdsWithoutCss
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).add(c.id);
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}
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if (!withLoading && !withHmr && initialChunkIdsWithCss.size === 0) {
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return null;
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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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uniqueName
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? 'link.setAttribute("data-webpack", uniqueName + ":" + key);'
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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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? Template.asString([
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"if (link.src.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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const cc = str => str.charCodeAt(0);
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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} = ${stateExpression} || ` : ""
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}{${Array.from(
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initialChunkIdsWithoutCss,
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id => `${JSON.stringify(id)}:0`
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).join(",")}};`,
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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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`var loadCssChunkData = ${runtimeTemplate.basicFunction(
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"target, link, chunkId",
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[
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`var data, token = "", token2, exports = {}, exportsWithId = [], exportsWithDashes = [], ${
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withHmr ? "moduleIds = [], " : ""
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}i = 0, cc = 1;`,
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"try { if(!link) link = loadStylesheet(chunkId); data = link.sheet.cssRules; data = data[data.length - 1].style; } catch(e) { data = getComputedStyle(document.head); }",
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`data = data.getPropertyValue(${
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uniqueName
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? runtimeTemplate.concatenation(
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"--webpack-",
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{ expr: "uniqueName" },
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"-",
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{ expr: "chunkId" }
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)
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: runtimeTemplate.concatenation("--webpack-", { expr: "chunkId" })
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});`,
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"if(!data) return [];",
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"for(; cc; i++) {",
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Template.indent([
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"cc = data.charCodeAt(i);",
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`if(cc == ${cc("(")}) { token2 = token; token = ""; }`,
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`else if(cc == ${cc(
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")"
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)}) { exports[token2.replace(/^_/, "")] = token.replace(/^_/, ""); token = ""; }`,
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`else if(cc == ${cc("/")} || cc == ${cc(
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"%"
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)}) { token = token.replace(/^_/, ""); exports[token] = token; exportsWithId.push(token); if(cc == ${cc(
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"%"
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)}) exportsWithDashes.push(token); token = ""; }`,
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`else if(!cc || cc == ${cc(
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","
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)}) { token = token.replace(/^_/, ""); exportsWithId.forEach(${runtimeTemplate.expressionFunction(
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`exports[x] = ${
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uniqueName
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? runtimeTemplate.concatenation(
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{ expr: "uniqueName" },
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"-",
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{ expr: "token" },
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"-",
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{ expr: "exports[x]" }
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)
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: runtimeTemplate.concatenation({ expr: "token" }, "-", {
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expr: "exports[x]"
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})
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}`,
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"x"
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)}); exportsWithDashes.forEach(${runtimeTemplate.expressionFunction(
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`exports[x] = "--" + exports[x]`,
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"x"
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)}); ${
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RuntimeGlobals.makeNamespaceObject
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}(exports); target[token] = (${runtimeTemplate.basicFunction(
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"exports, module",
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`module.exports = exports;`
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)}).bind(null, exports); ${
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withHmr ? "moduleIds.push(token); " : ""
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}token = ""; exports = {}; exportsWithId.length = 0; }`,
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`else if(cc == ${cc("\\")}) { token += data[++i] }`,
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`else { token += data[i]; }`
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]),
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"}",
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`${
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withHmr ? `if(target == ${RuntimeGlobals.moduleFactories}) ` : ""
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}installedChunks[chunkId] = 0;`,
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withHmr ? "return moduleIds;" : ""
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]
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)}`,
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'var loadingAttribute = "data-webpack-loading";',
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`var loadStylesheet = ${runtimeTemplate.basicFunction(
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"chunkId, url, done" + (withHmr ? ", hmr" : ""),
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[
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'var link, needAttach, key = "chunk-" + chunkId;',
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withHmr ? "if(!hmr) {" : "",
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'var links = document.getElementsByTagName("link");',
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"for(var i = 0; i < links.length; i++) {",
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Template.indent([
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"var l = links[i];",
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`if(l.rel == "stylesheet" && (${
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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, 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 }), ${loadTimeout});`,
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"link.onerror = onLinkComplete.bind(null, link.onerror);",
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"link.onload = onLinkComplete.bind(null, link.onload);"
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]),
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"} else onLinkComplete(undefined, { type: 'load', target: link });", // We assume any existing stylesheet is render blocking
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withHmr ? "hmr ? document.head.insertBefore(link, hmr) :" : "",
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"needAttach && document.head.appendChild(link);",
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"return link;"
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]
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)};`,
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initialChunkIdsWithCss.size > 2
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? `${JSON.stringify(
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Array.from(initialChunkIdsWithCss)
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)}.forEach(loadCssChunkData.bind(null, ${
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RuntimeGlobals.moduleFactories
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}, 0));`
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: initialChunkIdsWithCss.size > 0
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? `${Array.from(
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initialChunkIdsWithCss,
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id =>
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`loadCssChunkData(${
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RuntimeGlobals.moduleFactories
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}, 0, ${JSON.stringify(id)});`
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).join("")}`
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: "// no initial css",
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"",
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withLoading
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? Template.asString([
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`${fn}.css = ${runtimeTemplate.basicFunction(
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"chunkId, promises",
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hasCssMatcher !== false
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? [
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"// css chunk loading",
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`var installedChunkData = ${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) ? installedChunks[chunkId] : undefined;`,
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'if(installedChunkData !== 0) { // 0 means "already installed".',
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Template.indent([
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"",
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'// a Promise means "currently loading".',
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"if(installedChunkData) {",
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Template.indent([
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"promises.push(installedChunkData[2]);"
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]),
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"} else {",
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Template.indent([
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hasCssMatcher === true
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? "if(true) { // all chunks have CSS"
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: `if(${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 realSrc = event && event.target && event.target.src;",
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"error.message = 'Loading css 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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"} else {",
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Template.indent([
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`loadCssChunkData(${RuntimeGlobals.moduleFactories}, link, chunkId);`,
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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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"var link = loadStylesheet(chunkId, url, loadingEnded);"
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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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: "installedChunks[chunkId] = 0;"
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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 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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"",
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[]
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)}, apply: ${runtimeTemplate.basicFunction("", [
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"var moduleIds = [];",
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`newTags.forEach(${runtimeTemplate.expressionFunction(
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"info[1].sheet.disabled = false",
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"info"
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)});`,
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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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"while(newTags.length) {",
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Template.indent([
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`var info = newTags.pop();`,
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`var chunkModuleIds = loadCssChunkData(${RuntimeGlobals.moduleFactories}, info[1], info[0]);`,
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`chunkModuleIds.forEach(${runtimeTemplate.expressionFunction(
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"moduleIds.push(id)",
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"id"
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)});`
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]),
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"}",
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"return moduleIds;"
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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 = ${runtimeTemplate.basicFunction(
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"chunkIds, removedChunks, removedModules, promises, applyHandlers, updatedModulesList",
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[
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"applyHandlers.push(applyHandler);",
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`chunkIds.forEach(${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(), ${runtimeTemplate.basicFunction(
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"event",
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[
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'if(event.type !== "load") {',
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Template.indent([
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"var errorType = event && event.type;",
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"var realSrc = event && event.target && event.target.src;",
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"error.message = 'Loading css hot update chunk ' + chunkId + ' failed.\\n(' + errorType + ': ' + realSrc + ')';",
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"error.name = 'ChunkLoadError';",
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"error.type = errorType;",
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"error.request = realSrc;",
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"reject(error);"
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]),
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"} else {",
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Template.indent([
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"try { if(cssTextKey(oldTag) == cssTextKey(link)) { if(link.parentNode) link.parentNode.removeChild(link); return resolve(); } } catch(e) {}",
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"var factories = {};",
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"loadCssChunkData(factories, link, chunkId);",
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`Object.keys(factories).forEach(${runtimeTemplate.expressionFunction(
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"updatedModulesList.push(id)",
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"id"
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)})`,
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"link.sheet.disabled = true;",
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"oldTags.push(oldTag);",
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"newTags.push([chunkId, link]);",
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"resolve();"
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]),
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"}"
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]
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)}, 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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