| 1 | /*
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| 2 | MIT License http://www.opensource.org/licenses/mit-license.php
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| 3 | */
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| 4 |
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| 5 | "use strict";
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| 6 |
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| 7 | const RuntimeGlobals = require("../RuntimeGlobals");
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| 8 | const RuntimeModule = require("../RuntimeModule");
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| 9 | const Template = require("../Template");
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| 10 | const {
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| 11 | getChunkFilenameTemplate,
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| 12 | chunkHasJs
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| 13 | } = require("../javascript/JavascriptModulesPlugin");
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| 14 | const { getInitialChunkIds } = require("../javascript/StartupHelpers");
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| 15 | const compileBooleanMatcher = require("../util/compileBooleanMatcher");
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| 16 | const { getUndoPath } = require("../util/identifier");
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| 17 |
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| 18 | class ImportScriptsChunkLoadingRuntimeModule extends RuntimeModule {
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| 19 | constructor(runtimeRequirements, withCreateScriptUrl) {
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| 20 | super("importScripts chunk loading", RuntimeModule.STAGE_ATTACH);
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| 21 | this.runtimeRequirements = runtimeRequirements;
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| 22 | this._withCreateScriptUrl = withCreateScriptUrl;
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| 23 | }
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| 24 |
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| 25 | /**
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| 26 | * @returns {string} runtime code
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| 27 | */
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| 28 | generate() {
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| 29 | const {
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| 30 | chunk,
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| 31 | chunkGraph,
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| 32 | compilation: {
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| 33 | runtimeTemplate,
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| 34 | outputOptions: { globalObject, chunkLoadingGlobal, hotUpdateGlobal }
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| 35 | },
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| 36 | _withCreateScriptUrl: withCreateScriptUrl
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| 37 | } = this;
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| 38 | const fn = RuntimeGlobals.ensureChunkHandlers;
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| 39 | const withBaseURI = this.runtimeRequirements.has(RuntimeGlobals.baseURI);
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| 40 | const withLoading = this.runtimeRequirements.has(
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| 41 | RuntimeGlobals.ensureChunkHandlers
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| 42 | );
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| 43 | const withHmr = this.runtimeRequirements.has(
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| 44 | RuntimeGlobals.hmrDownloadUpdateHandlers
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| 45 | );
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| 46 | const withHmrManifest = this.runtimeRequirements.has(
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| 47 | RuntimeGlobals.hmrDownloadManifest
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| 48 | );
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| 49 | const chunkLoadingGlobalExpr = `${globalObject}[${JSON.stringify(
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| 50 | chunkLoadingGlobal
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| 51 | )}]`;
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| 52 | const hasJsMatcher = compileBooleanMatcher(
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| 53 | chunkGraph.getChunkConditionMap(chunk, chunkHasJs)
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| 54 | );
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| 55 | const initialChunkIds = getInitialChunkIds(chunk, chunkGraph);
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| 56 |
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| 57 | const outputName = this.compilation.getPath(
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| 58 | getChunkFilenameTemplate(chunk, this.compilation.outputOptions),
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| 59 | {
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| 60 | chunk,
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| 61 | contentHashType: "javascript"
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| 62 | }
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| 63 | );
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| 64 | const rootOutputDir = getUndoPath(
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| 65 | outputName,
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| 66 | this.compilation.outputOptions.path,
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| 67 | false
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| 68 | );
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| 69 |
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| 70 | return Template.asString([
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| 71 | withBaseURI
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| 72 | ? Template.asString([
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| 73 | `${RuntimeGlobals.baseURI} = self.location + ${JSON.stringify(
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| 74 | rootOutputDir ? "/../" + rootOutputDir : ""
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| 75 | )};`
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| 76 | ])
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| 77 | : "// no baseURI",
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| 78 | "",
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| 79 | "// object to store loaded chunks",
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| 80 | '// "1" means "already loaded"',
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| 81 | "var installedChunks = {",
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| 82 | Template.indent(
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| 83 | Array.from(initialChunkIds, id => `${JSON.stringify(id)}: 1`).join(
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| 84 | ",\n"
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| 85 | )
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| 86 | ),
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| 87 | "};",
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| 88 | "",
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| 89 | withLoading
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| 90 | ? Template.asString([
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| 91 | "// importScripts chunk loading",
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| 92 | `var installChunk = ${runtimeTemplate.basicFunction("data", [
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| 93 | runtimeTemplate.destructureArray(
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| 94 | ["chunkIds", "moreModules", "runtime"],
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| 95 | "data"
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| 96 | ),
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| 97 | "for(var moduleId in moreModules) {",
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| 98 | Template.indent([
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| 99 | `if(${RuntimeGlobals.hasOwnProperty}(moreModules, moduleId)) {`,
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| 100 | Template.indent(
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| 101 | `${RuntimeGlobals.moduleFactories}[moduleId] = moreModules[moduleId];`
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| 102 | ),
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| 103 | "}"
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| 104 | ]),
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| 105 | "}",
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| 106 | "if(runtime) runtime(__webpack_require__);",
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| 107 | "while(chunkIds.length)",
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| 108 | Template.indent("installedChunks[chunkIds.pop()] = 1;"),
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| 109 | "parentChunkLoadingFunction(data);"
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| 110 | ])};`
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| 111 | ])
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| 112 | : "// no chunk install function needed",
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| 113 | withLoading
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| 114 | ? Template.asString([
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| 115 | `${fn}.i = ${runtimeTemplate.basicFunction(
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| 116 | "chunkId, promises",
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| 117 | hasJsMatcher !== false
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| 118 | ? [
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| 119 | '// "1" is the signal for "already loaded"',
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| 120 | "if(!installedChunks[chunkId]) {",
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| 121 | Template.indent([
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| 122 | hasJsMatcher === true
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| 123 | ? "if(true) { // all chunks have JS"
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| 124 | : `if(${hasJsMatcher("chunkId")}) {`,
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| 125 | Template.indent(
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| 126 | `importScripts(${
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| 127 | withCreateScriptUrl
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| 128 | ? `${RuntimeGlobals.createScriptUrl}(${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkScriptFilename}(chunkId))`
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| 129 | : `${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkScriptFilename}(chunkId)`
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| 130 | });`
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| 131 | ),
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| 132 | "}"
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| 133 | ]),
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| 134 | "}"
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| 135 | ]
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| 136 | : "installedChunks[chunkId] = 1;"
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| 137 | )};`,
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| 138 | "",
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| 139 | `var chunkLoadingGlobal = ${chunkLoadingGlobalExpr} = ${chunkLoadingGlobalExpr} || [];`,
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| 140 | "var parentChunkLoadingFunction = chunkLoadingGlobal.push.bind(chunkLoadingGlobal);",
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| 141 | "chunkLoadingGlobal.push = installChunk;"
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| 142 | ])
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| 143 | : "// no chunk loading",
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| 144 | "",
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| 145 | withHmr
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| 146 | ? Template.asString([
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| 147 | "function loadUpdateChunk(chunkId, updatedModulesList) {",
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| 148 | Template.indent([
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| 149 | "var success = false;",
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| 150 | `${globalObject}[${JSON.stringify(
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| 151 | hotUpdateGlobal
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| 152 | )}] = ${runtimeTemplate.basicFunction("_, moreModules, runtime", [
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| 153 | "for(var moduleId in moreModules) {",
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| 154 | Template.indent([
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| 155 | `if(${RuntimeGlobals.hasOwnProperty}(moreModules, moduleId)) {`,
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| 156 | Template.indent([
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| 157 | "currentUpdate[moduleId] = moreModules[moduleId];",
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| 158 | "if(updatedModulesList) updatedModulesList.push(moduleId);"
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| 159 | ]),
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| 160 | "}"
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| 161 | ]),
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| 162 | "}",
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| 163 | "if(runtime) currentUpdateRuntime.push(runtime);",
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| 164 | "success = true;"
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| 165 | ])};`,
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| 166 | "// start update chunk loading",
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| 167 | `importScripts(${
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| 168 | withCreateScriptUrl
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| 169 | ? `${RuntimeGlobals.createScriptUrl}(${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkUpdateScriptFilename}(chunkId))`
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| 170 | : `${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkUpdateScriptFilename}(chunkId)`
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| 171 | });`,
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| 172 | 'if(!success) throw new Error("Loading update chunk failed for unknown reason");'
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| 173 | ]),
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| 174 | "}",
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| 175 | "",
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| 176 | Template.getFunctionContent(
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| 177 | require("../hmr/JavascriptHotModuleReplacement.runtime.js")
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| 178 | )
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| 179 | .replace(/\$key\$/g, "importScrips")
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| 180 | .replace(/\$installedChunks\$/g, "installedChunks")
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| 181 | .replace(/\$loadUpdateChunk\$/g, "loadUpdateChunk")
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| 182 | .replace(/\$moduleCache\$/g, RuntimeGlobals.moduleCache)
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| 183 | .replace(/\$moduleFactories\$/g, RuntimeGlobals.moduleFactories)
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| 184 | .replace(
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| 185 | /\$ensureChunkHandlers\$/g,
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| 186 | RuntimeGlobals.ensureChunkHandlers
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| 187 | )
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| 188 | .replace(/\$hasOwnProperty\$/g, RuntimeGlobals.hasOwnProperty)
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| 189 | .replace(/\$hmrModuleData\$/g, RuntimeGlobals.hmrModuleData)
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| 190 | .replace(
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| 191 | /\$hmrDownloadUpdateHandlers\$/g,
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| 192 | RuntimeGlobals.hmrDownloadUpdateHandlers
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| 193 | )
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| 194 | .replace(
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| 195 | /\$hmrInvalidateModuleHandlers\$/g,
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| 196 | RuntimeGlobals.hmrInvalidateModuleHandlers
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| 197 | )
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| 198 | ])
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| 199 | : "// no HMR",
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| 200 | "",
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| 201 | withHmrManifest
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| 202 | ? Template.asString([
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| 203 | `${
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| 204 | RuntimeGlobals.hmrDownloadManifest
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| 205 | } = ${runtimeTemplate.basicFunction("", [
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| 206 | 'if (typeof fetch === "undefined") throw new Error("No browser support: need fetch API");',
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| 207 | `return fetch(${RuntimeGlobals.publicPath} + ${
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| 208 | RuntimeGlobals.getUpdateManifestFilename
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| 209 | }()).then(${runtimeTemplate.basicFunction("response", [
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| 210 | "if(response.status === 404) return; // no update available",
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| 211 | 'if(!response.ok) throw new Error("Failed to fetch update manifest " + response.statusText);',
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| 212 | "return response.json();"
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| 213 | ])});`
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| 214 | ])};`
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| 215 | ])
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| 216 | : "// no HMR manifest"
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| 217 | ]);
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| 218 | }
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| 219 | }
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| 220 |
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| 221 | module.exports = ImportScriptsChunkLoadingRuntimeModule;
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