| 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 | chunkHasJs,
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| 12 | getChunkFilenameTemplate
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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 RequireChunkLoadingRuntimeModule extends RuntimeModule {
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| 19 | constructor(runtimeRequirements) {
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| 20 | super("require chunk loading", RuntimeModule.STAGE_ATTACH);
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| 21 | this.runtimeRequirements = runtimeRequirements;
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| 22 | }
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| 23 |
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| 24 | /**
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| 25 | * @returns {string} runtime code
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| 26 | */
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| 27 | generate() {
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| 28 | const { chunkGraph, chunk } = this;
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| 29 | const { runtimeTemplate } = this.compilation;
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| 30 | const fn = RuntimeGlobals.ensureChunkHandlers;
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| 31 | const withBaseURI = this.runtimeRequirements.has(RuntimeGlobals.baseURI);
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| 32 | const withExternalInstallChunk = this.runtimeRequirements.has(
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| 33 | RuntimeGlobals.externalInstallChunk
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| 34 | );
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| 35 | const withOnChunkLoad = this.runtimeRequirements.has(
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| 36 | RuntimeGlobals.onChunksLoaded
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| 37 | );
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| 38 | const withLoading = this.runtimeRequirements.has(
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| 39 | RuntimeGlobals.ensureChunkHandlers
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| 40 | );
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| 41 | const withHmr = this.runtimeRequirements.has(
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| 42 | RuntimeGlobals.hmrDownloadUpdateHandlers
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| 43 | );
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| 44 | const withHmrManifest = this.runtimeRequirements.has(
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| 45 | RuntimeGlobals.hmrDownloadManifest
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| 46 | );
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| 47 | const conditionMap = chunkGraph.getChunkConditionMap(chunk, chunkHasJs);
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| 48 | const hasJsMatcher = compileBooleanMatcher(conditionMap);
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| 49 | const initialChunkIds = getInitialChunkIds(chunk, chunkGraph);
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| 50 |
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| 51 | const outputName = this.compilation.getPath(
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| 52 | getChunkFilenameTemplate(chunk, this.compilation.outputOptions),
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| 53 | {
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| 54 | chunk,
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| 55 | contentHashType: "javascript"
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| 56 | }
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| 57 | );
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| 58 | const rootOutputDir = getUndoPath(
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| 59 | outputName,
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| 60 | this.compilation.outputOptions.path,
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| 61 | true
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| 62 | );
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| 63 |
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| 64 | return Template.asString([
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| 65 | withBaseURI
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| 66 | ? Template.asString([
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| 67 | `${RuntimeGlobals.baseURI} = require("url").pathToFileURL(${
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| 68 | rootOutputDir !== "./"
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| 69 | ? `__dirname + ${JSON.stringify("/" + rootOutputDir)}`
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| 70 | : "__filename"
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| 71 | });`
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| 72 | ])
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| 73 | : "// no baseURI",
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| 74 | "",
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| 75 | "// object to store loaded chunks",
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| 76 | '// "1" means "loaded", otherwise not loaded yet',
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| 77 | "var installedChunks = {",
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| 78 | Template.indent(
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| 79 | Array.from(initialChunkIds, id => `${JSON.stringify(id)}: 1`).join(
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| 80 | ",\n"
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| 81 | )
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| 82 | ),
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| 83 | "};",
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| 84 | "",
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| 85 | withOnChunkLoad
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| 86 | ? `${
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| 87 | RuntimeGlobals.onChunksLoaded
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| 88 | }.require = ${runtimeTemplate.returningFunction(
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| 89 | "installedChunks[chunkId]",
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| 90 | "chunkId"
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| 91 | )};`
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| 92 | : "// no on chunks loaded",
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| 93 | "",
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| 94 | withLoading || withExternalInstallChunk
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| 95 | ? `var installChunk = ${runtimeTemplate.basicFunction("chunk", [
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| 96 | "var moreModules = chunk.modules, chunkIds = chunk.ids, runtime = chunk.runtime;",
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| 97 | "for(var moduleId in moreModules) {",
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| 98 | Template.indent([
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| 99 | `if(${RuntimeGlobals.hasOwnProperty}(moreModules, moduleId)) {`,
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| 100 | Template.indent([
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| 101 | `${RuntimeGlobals.moduleFactories}[moduleId] = moreModules[moduleId];`
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| 102 | ]),
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| 103 | "}"
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| 104 | ]),
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| 105 | "}",
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| 106 | `if(runtime) runtime(__webpack_require__);`,
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| 107 | "for(var i = 0; i < chunkIds.length; i++)",
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| 108 | Template.indent("installedChunks[chunkIds[i]] = 1;"),
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| 109 | withOnChunkLoad ? `${RuntimeGlobals.onChunksLoaded}();` : ""
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| 110 | ])};`
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| 111 | : "// no chunk install function needed",
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| 112 | "",
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| 113 | withLoading
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| 114 | ? Template.asString([
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| 115 | "// require() chunk loading for javascript",
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| 116 | `${fn}.require = ${runtimeTemplate.basicFunction(
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| 117 | "chunkId, promises",
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| 118 | hasJsMatcher !== false
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| 119 | ? [
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| 120 | '// "1" is the signal for "already loaded"',
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| 121 | "if(!installedChunks[chunkId]) {",
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| 122 | Template.indent([
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| 123 | hasJsMatcher === true
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| 124 | ? "if(true) { // all chunks have JS"
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| 125 | : `if(${hasJsMatcher("chunkId")}) {`,
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| 126 | Template.indent([
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| 127 | `installChunk(require(${JSON.stringify(
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| 128 | rootOutputDir
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| 129 | )} + ${
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| 130 | RuntimeGlobals.getChunkScriptFilename
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| 131 | }(chunkId)));`
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| 132 | ]),
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| 133 | "} else installedChunks[chunkId] = 1;",
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| 134 | ""
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| 135 | ]),
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| 136 | "}"
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| 137 | ]
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| 138 | : "installedChunks[chunkId] = 1;"
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| 139 | )};`
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| 140 | ])
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| 141 | : "// no chunk loading",
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| 142 | "",
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| 143 | withExternalInstallChunk
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| 144 | ? Template.asString([
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| 145 | "module.exports = __webpack_require__;",
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| 146 | `${RuntimeGlobals.externalInstallChunk} = installChunk;`
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| 147 | ])
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| 148 | : "// no external install chunk",
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| 149 | "",
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| 150 | withHmr
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| 151 | ? Template.asString([
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| 152 | "function loadUpdateChunk(chunkId, updatedModulesList) {",
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| 153 | Template.indent([
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| 154 | `var update = require(${JSON.stringify(rootOutputDir)} + ${
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| 155 | RuntimeGlobals.getChunkUpdateScriptFilename
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| 156 | }(chunkId));`,
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| 157 | "var updatedModules = update.modules;",
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| 158 | "var runtime = update.runtime;",
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| 159 | "for(var moduleId in updatedModules) {",
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| 160 | Template.indent([
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| 161 | `if(${RuntimeGlobals.hasOwnProperty}(updatedModules, moduleId)) {`,
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| 162 | Template.indent([
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| 163 | `currentUpdate[moduleId] = updatedModules[moduleId];`,
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| 164 | "if(updatedModulesList) updatedModulesList.push(moduleId);"
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| 165 | ]),
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| 166 | "}"
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| 167 | ]),
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| 168 | "}",
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| 169 | "if(runtime) currentUpdateRuntime.push(runtime);"
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| 170 | ]),
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| 171 | "}",
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| 172 | "",
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| 173 | Template.getFunctionContent(
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| 174 | require("../hmr/JavascriptHotModuleReplacement.runtime.js")
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| 175 | )
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| 176 | .replace(/\$key\$/g, "require")
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| 177 | .replace(/\$installedChunks\$/g, "installedChunks")
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| 178 | .replace(/\$loadUpdateChunk\$/g, "loadUpdateChunk")
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| 179 | .replace(/\$moduleCache\$/g, RuntimeGlobals.moduleCache)
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| 180 | .replace(/\$moduleFactories\$/g, RuntimeGlobals.moduleFactories)
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| 181 | .replace(
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| 182 | /\$ensureChunkHandlers\$/g,
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| 183 | RuntimeGlobals.ensureChunkHandlers
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| 184 | )
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| 185 | .replace(/\$hasOwnProperty\$/g, RuntimeGlobals.hasOwnProperty)
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| 186 | .replace(/\$hmrModuleData\$/g, RuntimeGlobals.hmrModuleData)
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| 187 | .replace(
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| 188 | /\$hmrDownloadUpdateHandlers\$/g,
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| 189 | RuntimeGlobals.hmrDownloadUpdateHandlers
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| 190 | )
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| 191 | .replace(
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| 192 | /\$hmrInvalidateModuleHandlers\$/g,
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| 193 | RuntimeGlobals.hmrInvalidateModuleHandlers
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| 194 | )
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| 195 | ])
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| 196 | : "// no HMR",
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| 197 | "",
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| 198 | withHmrManifest
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| 199 | ? Template.asString([
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| 200 | `${RuntimeGlobals.hmrDownloadManifest} = function() {`,
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| 201 | Template.indent([
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| 202 | "return Promise.resolve().then(function() {",
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| 203 | Template.indent([
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| 204 | `return require(${JSON.stringify(rootOutputDir)} + ${
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| 205 | RuntimeGlobals.getUpdateManifestFilename
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| 206 | }());`
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| 207 | ]),
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| 208 | '}).catch(function(err) { if(err.code !== "MODULE_NOT_FOUND") throw err; });'
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| 209 | ]),
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| 210 | "}"
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| 211 | ])
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| 212 | : "// no HMR manifest"
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| 213 | ]);
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| 214 | }
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| 215 | }
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| 216 |
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| 217 | module.exports = RequireChunkLoadingRuntimeModule;
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