| 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 { SyncWaterfallHook } = require("tapable");
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| 8 | const Compilation = require("../Compilation");
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| 9 | const RuntimeGlobals = require("../RuntimeGlobals");
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| 10 | const RuntimeModule = require("../RuntimeModule");
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| 11 | const Template = require("../Template");
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| 12 | const {
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| 13 | generateJavascriptHMR
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| 14 | } = require("../hmr/JavascriptHotModuleReplacementHelper");
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| 15 | const {
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| 16 | chunkHasJs,
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| 17 | getChunkFilenameTemplate
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| 18 | } = require("../javascript/JavascriptModulesPlugin");
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| 19 | const { getInitialChunkIds } = require("../javascript/StartupHelpers");
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| 20 | const compileBooleanMatcher = require("../util/compileBooleanMatcher");
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| 21 | const { getUndoPath } = require("../util/identifier");
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| 22 |
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| 23 | /** @typedef {import("../Chunk")} Chunk */
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| 24 | /** @typedef {import("../ChunkGraph")} ChunkGraph */
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| 25 | /** @typedef {import("../Module").ReadOnlyRuntimeRequirements} ReadOnlyRuntimeRequirements */
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| 26 |
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| 27 | /**
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| 28 | * Defines the jsonp compilation plugin hooks type used by this module.
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| 29 | * @typedef {object} JsonpCompilationPluginHooks
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| 30 | * @property {SyncWaterfallHook<[string, Chunk]>} linkPreload
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| 31 | * @property {SyncWaterfallHook<[string, Chunk]>} linkPrefetch
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| 32 | */
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| 33 |
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| 34 | /** @type {WeakMap<Compilation, JsonpCompilationPluginHooks>} */
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| 35 | const compilationHooksMap = new WeakMap();
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| 36 |
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| 37 | class ModuleChunkLoadingRuntimeModule extends RuntimeModule {
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| 38 | /**
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| 39 | * Returns hooks.
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| 40 | * @param {Compilation} compilation the compilation
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| 41 | * @returns {JsonpCompilationPluginHooks} hooks
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| 42 | */
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| 43 | static getCompilationHooks(compilation) {
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| 44 | if (!(compilation instanceof Compilation)) {
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| 45 | throw new TypeError(
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| 46 | "The 'compilation' argument must be an instance of Compilation"
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| 47 | );
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| 48 | }
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| 49 | let hooks = compilationHooksMap.get(compilation);
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| 50 | if (hooks === undefined) {
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| 51 | hooks = {
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| 52 | linkPreload: new SyncWaterfallHook(["source", "chunk"]),
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| 53 | linkPrefetch: new SyncWaterfallHook(["source", "chunk"])
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| 54 | };
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| 55 | compilationHooksMap.set(compilation, hooks);
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| 56 | }
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| 57 | return hooks;
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| 58 | }
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| 59 |
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| 60 | /**
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| 61 | * Creates an instance of ModuleChunkLoadingRuntimeModule.
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| 62 | * @param {ReadOnlyRuntimeRequirements} runtimeRequirements runtime requirements
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| 63 | */
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| 64 | constructor(runtimeRequirements) {
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| 65 | super("import chunk loading", RuntimeModule.STAGE_ATTACH);
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| 66 | /** @type {ReadOnlyRuntimeRequirements} */
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| 67 | this._runtimeRequirements = runtimeRequirements;
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| 68 | }
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| 69 |
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| 70 | /**
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| 71 | * Returns generated code.
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| 72 | * @private
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| 73 | * @param {Chunk} chunk chunk
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| 74 | * @param {string} rootOutputDir root output directory
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| 75 | * @returns {string} generated code
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| 76 | */
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| 77 | _generateBaseUri(chunk, rootOutputDir) {
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| 78 | const options = chunk.getEntryOptions();
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| 79 | if (options && options.baseUri) {
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| 80 | return `${RuntimeGlobals.baseURI} = ${JSON.stringify(options.baseUri)};`;
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| 81 | }
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| 82 | const compilation = /** @type {Compilation} */ (this.compilation);
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| 83 | const {
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| 84 | outputOptions: { importMetaName }
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| 85 | } = compilation;
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| 86 | return `${RuntimeGlobals.baseURI} = new URL(${JSON.stringify(
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| 87 | rootOutputDir
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| 88 | )}, ${importMetaName}.url);`;
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| 89 | }
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| 90 |
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| 91 | /**
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| 92 | * Generates runtime code for this runtime module.
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| 93 | * @returns {string | null} runtime code
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| 94 | */
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| 95 | generate() {
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| 96 | const compilation = /** @type {Compilation} */ (this.compilation);
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| 97 | const chunkGraph = /** @type {ChunkGraph} */ (this.chunkGraph);
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| 98 | const chunk = /** @type {Chunk} */ (this.chunk);
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| 99 | const environment = compilation.outputOptions.environment;
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| 100 | const {
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| 101 | runtimeTemplate,
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| 102 | outputOptions: { importFunctionName, crossOriginLoading, charset }
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| 103 | } = compilation;
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| 104 | const fn = RuntimeGlobals.ensureChunkHandlers;
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| 105 | const withBaseURI = this._runtimeRequirements.has(RuntimeGlobals.baseURI);
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| 106 | const withExternalInstallChunk = this._runtimeRequirements.has(
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| 107 | RuntimeGlobals.externalInstallChunk
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| 108 | );
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| 109 | const withLoading = this._runtimeRequirements.has(
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| 110 | RuntimeGlobals.ensureChunkHandlers
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| 111 | );
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| 112 | const withOnChunkLoad = this._runtimeRequirements.has(
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| 113 | RuntimeGlobals.onChunksLoaded
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| 114 | );
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| 115 | const withHmr = this._runtimeRequirements.has(
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| 116 | RuntimeGlobals.hmrDownloadUpdateHandlers
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| 117 | );
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| 118 | const withHmrManifest = this._runtimeRequirements.has(
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| 119 | RuntimeGlobals.hmrDownloadManifest
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| 120 | );
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| 121 | const { linkPreload, linkPrefetch } =
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| 122 | ModuleChunkLoadingRuntimeModule.getCompilationHooks(compilation);
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| 123 | const isNeutralPlatform = runtimeTemplate.isNeutralPlatform();
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| 124 | const withPrefetch =
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| 125 | (environment.document || isNeutralPlatform) &&
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| 126 | this._runtimeRequirements.has(RuntimeGlobals.prefetchChunkHandlers) &&
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| 127 | chunk.hasChildByOrder(chunkGraph, "prefetch", true, chunkHasJs);
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| 128 | const withPreload =
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| 129 | (environment.document || isNeutralPlatform) &&
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| 130 | this._runtimeRequirements.has(RuntimeGlobals.preloadChunkHandlers) &&
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| 131 | chunk.hasChildByOrder(chunkGraph, "preload", true, chunkHasJs);
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| 132 | const conditionMap = chunkGraph.getChunkConditionMap(chunk, chunkHasJs);
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| 133 | const hasJsMatcher = compileBooleanMatcher(conditionMap);
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| 134 | const initialChunkIds = getInitialChunkIds(chunk, chunkGraph, chunkHasJs);
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| 135 |
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| 136 | const outputName = compilation.getPath(
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| 137 | getChunkFilenameTemplate(chunk, compilation.outputOptions),
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| 138 | {
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| 139 | chunk,
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| 140 | contentHashType: "javascript"
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| 141 | }
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| 142 | );
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| 143 | const rootOutputDir = getUndoPath(
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| 144 | outputName,
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| 145 | compilation.outputOptions.path,
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| 146 | true
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| 147 | );
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| 148 |
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| 149 | const stateExpression = withHmr
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| 150 | ? `${RuntimeGlobals.hmrRuntimeStatePrefix}_module`
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| 151 | : undefined;
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| 152 |
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| 153 | return Template.asString([
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| 154 | withBaseURI
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| 155 | ? this._generateBaseUri(chunk, rootOutputDir)
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| 156 | : "// no baseURI",
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| 157 | "",
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| 158 | "// object to store loaded and loading chunks",
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| 159 | "// undefined = chunk not loaded, null = chunk preloaded/prefetched",
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| 160 | "// [resolve, Promise] = chunk loading, 0 = chunk loaded",
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| 161 | `var installedChunks = ${
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| 162 | stateExpression ? `${stateExpression} = ${stateExpression} || ` : ""
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| 163 | }{`,
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| 164 | Template.indent(
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| 165 | Array.from(initialChunkIds, (id) => `${JSON.stringify(id)}: 0`).join(
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| 166 | ",\n"
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| 167 | )
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| 168 | ),
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| 169 | "};",
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| 170 | "",
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| 171 | withLoading || withExternalInstallChunk
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| 172 | ? `var installChunk = ${runtimeTemplate.basicFunction("data", [
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| 173 | runtimeTemplate.destructureObject(
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| 174 | [
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| 175 | RuntimeGlobals.esmIds,
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| 176 | RuntimeGlobals.esmModules,
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| 177 | RuntimeGlobals.esmRuntime
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| 178 | ],
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| 179 | "data"
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| 180 | ),
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| 181 | '// add "modules" to the modules object,',
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| 182 | '// then flag all "ids" as loaded and fire callback',
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| 183 | "var moduleId, chunkId, i = 0;",
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| 184 | `for(moduleId in ${RuntimeGlobals.esmModules}) {`,
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| 185 | Template.indent([
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| 186 | `if(${RuntimeGlobals.hasOwnProperty}(${RuntimeGlobals.esmModules}, moduleId)) {`,
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| 187 | Template.indent(
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| 188 | `${RuntimeGlobals.moduleFactories}[moduleId] = ${RuntimeGlobals.esmModules}[moduleId];`
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| 189 | ),
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| 190 | "}"
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| 191 | ]),
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| 192 | "}",
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| 193 | `if(${RuntimeGlobals.esmRuntime}) ${RuntimeGlobals.esmRuntime}(${RuntimeGlobals.require});`,
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| 194 | `for(;i < ${RuntimeGlobals.esmIds}.length; i++) {`,
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| 195 | Template.indent([
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| 196 | `chunkId = ${RuntimeGlobals.esmIds}[i];`,
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| 197 | `if(${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) && installedChunks[chunkId]) {`,
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| 198 | Template.indent("installedChunks[chunkId][0]();"),
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| 199 | "}",
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| 200 | `installedChunks[${RuntimeGlobals.esmIds}[i]] = 0;`
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| 201 | ]),
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| 202 | "}",
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| 203 | withOnChunkLoad ? `${RuntimeGlobals.onChunksLoaded}();` : ""
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| 204 | ])}`
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| 205 | : "// no install chunk",
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| 206 | "",
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| 207 | withLoading
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| 208 | ? Template.asString([
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| 209 | `${fn}.j = ${runtimeTemplate.basicFunction(
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| 210 | "chunkId, promises",
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| 211 | hasJsMatcher !== false
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| 212 | ? Template.indent([
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| 213 | "// import() chunk loading for javascript",
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| 214 | `var installedChunkData = ${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) ? installedChunks[chunkId] : undefined;`,
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| 215 | 'if(installedChunkData !== 0) { // 0 means "already installed".',
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| 216 | Template.indent([
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| 217 | "",
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| 218 | '// a Promise means "currently loading".',
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| 219 | "if(installedChunkData) {",
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| 220 | Template.indent([
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| 221 | "promises.push(installedChunkData[1]);"
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| 222 | ]),
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| 223 | "} else {",
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| 224 | Template.indent([
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| 225 | hasJsMatcher === true
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| 226 | ? "if(true) { // all chunks have JS"
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| 227 | : `if(${hasJsMatcher("chunkId")}) {`,
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| 228 | Template.indent([
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| 229 | "// setup Promise in chunk cache",
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| 230 | `var promise = ${importFunctionName}(${
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| 231 | compilation.outputOptions.publicPath === "auto"
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| 232 | ? JSON.stringify(rootOutputDir)
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| 233 | : RuntimeGlobals.publicPath
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| 234 | } + ${
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| 235 | RuntimeGlobals.getChunkScriptFilename
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| 236 | }(chunkId)).then(installChunk, ${runtimeTemplate.basicFunction(
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| 237 | "e",
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| 238 | [
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| 239 | "if(installedChunks[chunkId] !== 0) installedChunks[chunkId] = undefined;",
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| 240 | "throw e;"
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| 241 | ]
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| 242 | )});`,
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| 243 | `var promise = Promise.race([promise, new Promise(${runtimeTemplate.expressionFunction(
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| 244 | "installedChunkData = installedChunks[chunkId] = [resolve]",
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| 245 | "resolve"
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| 246 | )})])`,
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| 247 | "promises.push(installedChunkData[1] = promise);"
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| 248 | ]),
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| 249 | hasJsMatcher === true
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| 250 | ? "}"
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| 251 | : "} else installedChunks[chunkId] = 0;"
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| 252 | ]),
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| 253 | "}"
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| 254 | ]),
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| 255 | "}"
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| 256 | ])
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| 257 | : Template.indent(["installedChunks[chunkId] = 0;"])
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| 258 | )};`
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| 259 | ])
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| 260 | : "// no chunk on demand loading",
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| 261 | "",
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| 262 | withPrefetch && hasJsMatcher !== false
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| 263 | ? `${
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| 264 | RuntimeGlobals.prefetchChunkHandlers
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| 265 | }.j = ${runtimeTemplate.basicFunction("chunkId", [
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| 266 | isNeutralPlatform
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| 267 | ? "if (typeof document === 'undefined') return;"
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| 268 | : "",
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| 269 | `if((!${
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| 270 | RuntimeGlobals.hasOwnProperty
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| 271 | }(installedChunks, chunkId) || installedChunks[chunkId] === undefined) && ${
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| 272 | hasJsMatcher === true ? "true" : hasJsMatcher("chunkId")
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| 273 | }) {`,
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| 274 | Template.indent([
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| 275 | "installedChunks[chunkId] = null;",
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| 276 | linkPrefetch.call(
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| 277 | Template.asString([
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| 278 | "var link = document.createElement('link');",
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| 279 | charset ? "link.charset = 'utf-8';" : "",
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| 280 | crossOriginLoading
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| 281 | ? `link.crossOrigin = ${JSON.stringify(
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| 282 | crossOriginLoading
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| 283 | )};`
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| 284 | : "",
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| 285 | `if (${RuntimeGlobals.scriptNonce}) {`,
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| 286 | Template.indent(
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| 287 | `link.setAttribute("nonce", ${RuntimeGlobals.scriptNonce});`
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| 288 | ),
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| 289 | "}",
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| 290 | 'link.rel = "prefetch";',
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| 291 | 'link.as = "script";',
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| 292 | `link.href = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkScriptFilename}(chunkId);`
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| 293 | ]),
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| 294 | chunk
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| 295 | ),
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| 296 | "document.head.appendChild(link);"
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| 297 | ]),
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| 298 | "}"
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| 299 | ])};`
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| 300 | : "// no prefetching",
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| 301 | "",
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| 302 | withPreload && hasJsMatcher !== false
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| 303 | ? `${
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| 304 | RuntimeGlobals.preloadChunkHandlers
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| 305 | }.j = ${runtimeTemplate.basicFunction("chunkId", [
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| 306 | isNeutralPlatform
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| 307 | ? "if (typeof document === 'undefined') return;"
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| 308 | : "",
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| 309 | `if((!${
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| 310 | RuntimeGlobals.hasOwnProperty
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| 311 | }(installedChunks, chunkId) || installedChunks[chunkId] === undefined) && ${
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| 312 | hasJsMatcher === true ? "true" : hasJsMatcher("chunkId")
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| 313 | }) {`,
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| 314 | Template.indent([
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| 315 | "installedChunks[chunkId] = null;",
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| 316 | linkPreload.call(
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| 317 | Template.asString([
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| 318 | "var link = document.createElement('link');",
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| 319 | charset ? "link.charset = 'utf-8';" : "",
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| 320 | `if (${RuntimeGlobals.scriptNonce}) {`,
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| 321 | Template.indent(
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| 322 | `link.setAttribute("nonce", ${RuntimeGlobals.scriptNonce});`
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| 323 | ),
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| 324 | "}",
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| 325 | 'link.rel = "modulepreload";',
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| 326 | `link.href = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkScriptFilename}(chunkId);`,
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| 327 | crossOriginLoading
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| 328 | ? crossOriginLoading === "use-credentials"
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| 329 | ? 'link.crossOrigin = "use-credentials";'
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| 330 | : Template.asString([
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| 331 | "if (link.href.indexOf(window.location.origin + '/') !== 0) {",
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| 332 | Template.indent(
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| 333 | `link.crossOrigin = ${JSON.stringify(
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| 334 | crossOriginLoading
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| 335 | )};`
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| 336 | ),
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| 337 | "}"
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| 338 | ])
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| 339 | : ""
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| 340 | ]),
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| 341 | chunk
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| 342 | ),
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| 343 | "document.head.appendChild(link);"
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| 344 | ]),
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| 345 | "}"
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| 346 | ])};`
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| 347 | : "// no preloaded",
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| 348 | "",
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| 349 | withExternalInstallChunk
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| 350 | ? Template.asString([
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| 351 | `${RuntimeGlobals.externalInstallChunk} = installChunk;`
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| 352 | ])
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| 353 | : "// no external install chunk",
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| 354 | "",
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| 355 | withOnChunkLoad
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| 356 | ? `${
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| 357 | RuntimeGlobals.onChunksLoaded
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| 358 | }.j = ${runtimeTemplate.returningFunction(
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| 359 | "installedChunks[chunkId] === 0",
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| 360 | "chunkId"
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| 361 | )};`
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| 362 | : "// no on chunks loaded",
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| 363 | withHmr
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| 364 | ? Template.asString([
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| 365 | generateJavascriptHMR("module"),
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| 366 | "",
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| 367 | "function loadUpdateChunk(chunkId, updatedModulesList) {",
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| 368 | Template.indent([
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| 369 | `return new Promise(${runtimeTemplate.basicFunction(
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| 370 | "resolve, reject",
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| 371 | [
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| 372 | "// start update chunk loading",
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| 373 | `var url = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkUpdateScriptFilename}(chunkId);`,
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| 374 | `var onResolve = ${runtimeTemplate.basicFunction("obj", [
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| 375 | `var updatedModules = obj.${RuntimeGlobals.esmModules};`,
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| 376 | `var updatedRuntime = obj.${RuntimeGlobals.esmRuntime};`,
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| 377 | "if(updatedRuntime) currentUpdateRuntime.push(updatedRuntime);",
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| 378 | "for(var moduleId in updatedModules) {",
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| 379 | Template.indent([
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| 380 | `if(${RuntimeGlobals.hasOwnProperty}(updatedModules, moduleId)) {`,
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| 381 | Template.indent([
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| 382 | "currentUpdate[moduleId] = updatedModules[moduleId];",
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| 383 | "if(updatedModulesList) updatedModulesList.push(moduleId);"
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| 384 | ]),
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| 385 | "}"
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| 386 | ]),
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| 387 | "}",
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| 388 | "resolve(obj);"
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| 389 | ])};`,
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| 390 | `var onReject = ${runtimeTemplate.basicFunction("error", [
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| 391 | "var errorMsg = error.message || 'unknown reason';",
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| 392 | "error.message = 'Loading hot update chunk ' + chunkId + ' failed.\\n(' + errorMsg + ')';",
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| 393 | "error.name = 'ChunkLoadError';",
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| 394 | "reject(error);"
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| 395 | ])}`,
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| 396 | `var loadScript = ${runtimeTemplate.basicFunction(
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| 397 | "url, onResolve, onReject",
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| 398 | [
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| 399 | `return ${importFunctionName}(/* webpackIgnore: true */ url).then(onResolve).catch(onReject)`
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| 400 | ]
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| 401 | )}`,
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| 402 | "loadScript(url, onResolve, onReject);"
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| 403 | ]
|
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| 404 | )});`
|
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| 405 | ]),
|
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| 406 | "}",
|
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| 407 | ""
|
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| 408 | ])
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| 409 | : "// no HMR",
|
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| 410 | "",
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| 411 | withHmrManifest
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| 412 | ? Template.asString([
|
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| 413 | `${
|
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| 414 | RuntimeGlobals.hmrDownloadManifest
|
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| 415 | } = ${runtimeTemplate.basicFunction("", [
|
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| 416 | `return ${importFunctionName}(/* webpackIgnore: true */ ${RuntimeGlobals.publicPath} + ${
|
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| 417 | RuntimeGlobals.getUpdateManifestFilename
|
|---|
| 418 | }()).then(${runtimeTemplate.basicFunction("obj", [
|
|---|
| 419 | "return obj.default;"
|
|---|
| 420 | ])}, ${runtimeTemplate.basicFunction("error", [
|
|---|
| 421 | "if(['MODULE_NOT_FOUND', 'ENOENT'].includes(error.code)) return;",
|
|---|
| 422 | "throw error;"
|
|---|
| 423 | ])});`
|
|---|
| 424 | ])};`
|
|---|
| 425 | ])
|
|---|
| 426 | : "// no HMR manifest"
|
|---|
| 427 | ]);
|
|---|
| 428 | }
|
|---|
| 429 | }
|
|---|
| 430 |
|
|---|
| 431 | module.exports = ModuleChunkLoadingRuntimeModule;
|
|---|
