| 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 chunkHasJs = require("../javascript/JavascriptModulesPlugin").chunkHasJs;
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| 13 | const { getInitialChunkIds } = require("../javascript/StartupHelpers");
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| 14 | const compileBooleanMatcher = require("../util/compileBooleanMatcher");
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| 15 |
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| 16 | /** @typedef {import("../Chunk")} Chunk */
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| 17 |
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| 18 | /**
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| 19 | * @typedef {Object} JsonpCompilationPluginHooks
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| 20 | * @property {SyncWaterfallHook<[string, Chunk]>} linkPreload
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| 21 | * @property {SyncWaterfallHook<[string, Chunk]>} linkPrefetch
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| 22 | */
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| 23 |
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| 24 | /** @type {WeakMap<Compilation, JsonpCompilationPluginHooks>} */
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| 25 | const compilationHooksMap = new WeakMap();
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| 26 |
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| 27 | class JsonpChunkLoadingRuntimeModule extends RuntimeModule {
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| 28 | /**
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| 29 | * @param {Compilation} compilation the compilation
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| 30 | * @returns {JsonpCompilationPluginHooks} hooks
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| 31 | */
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| 32 | static getCompilationHooks(compilation) {
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| 33 | if (!(compilation instanceof Compilation)) {
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| 34 | throw new TypeError(
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| 35 | "The 'compilation' argument must be an instance of Compilation"
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| 36 | );
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| 37 | }
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| 38 | let hooks = compilationHooksMap.get(compilation);
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| 39 | if (hooks === undefined) {
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| 40 | hooks = {
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| 41 | linkPreload: new SyncWaterfallHook(["source", "chunk"]),
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| 42 | linkPrefetch: new SyncWaterfallHook(["source", "chunk"])
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| 43 | };
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| 44 | compilationHooksMap.set(compilation, hooks);
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| 45 | }
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| 46 | return hooks;
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| 47 | }
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| 48 |
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| 49 | constructor(runtimeRequirements) {
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| 50 | super("jsonp chunk loading", RuntimeModule.STAGE_ATTACH);
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| 51 | this._runtimeRequirements = runtimeRequirements;
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| 52 | }
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| 53 |
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| 54 | /**
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| 55 | * @returns {string} runtime code
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| 56 | */
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| 57 | generate() {
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| 58 | const { chunkGraph, compilation, chunk } = this;
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| 59 | const {
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| 60 | runtimeTemplate,
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| 61 | outputOptions: {
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| 62 | globalObject,
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| 63 | chunkLoadingGlobal,
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| 64 | hotUpdateGlobal,
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| 65 | crossOriginLoading,
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| 66 | scriptType
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| 67 | }
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| 68 | } = compilation;
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| 69 | const { linkPreload, linkPrefetch } =
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| 70 | JsonpChunkLoadingRuntimeModule.getCompilationHooks(compilation);
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| 71 | const fn = RuntimeGlobals.ensureChunkHandlers;
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| 72 | const withBaseURI = this._runtimeRequirements.has(RuntimeGlobals.baseURI);
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| 73 | const withLoading = this._runtimeRequirements.has(
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| 74 | RuntimeGlobals.ensureChunkHandlers
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| 75 | );
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| 76 | const withCallback = this._runtimeRequirements.has(
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| 77 | RuntimeGlobals.chunkCallback
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| 78 | );
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| 79 | const withOnChunkLoad = this._runtimeRequirements.has(
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| 80 | RuntimeGlobals.onChunksLoaded
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| 81 | );
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| 82 | const withHmr = this._runtimeRequirements.has(
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| 83 | RuntimeGlobals.hmrDownloadUpdateHandlers
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| 84 | );
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| 85 | const withHmrManifest = this._runtimeRequirements.has(
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| 86 | RuntimeGlobals.hmrDownloadManifest
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| 87 | );
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| 88 | const withPrefetch = this._runtimeRequirements.has(
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| 89 | RuntimeGlobals.prefetchChunkHandlers
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| 90 | );
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| 91 | const withPreload = this._runtimeRequirements.has(
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| 92 | RuntimeGlobals.preloadChunkHandlers
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| 93 | );
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| 94 | const chunkLoadingGlobalExpr = `${globalObject}[${JSON.stringify(
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| 95 | chunkLoadingGlobal
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| 96 | )}]`;
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| 97 | const conditionMap = chunkGraph.getChunkConditionMap(chunk, chunkHasJs);
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| 98 | const hasJsMatcher = compileBooleanMatcher(conditionMap);
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| 99 | const initialChunkIds = getInitialChunkIds(chunk, chunkGraph);
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| 100 |
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| 101 | return Template.asString([
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| 102 | withBaseURI
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| 103 | ? Template.asString([
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| 104 | `${RuntimeGlobals.baseURI} = document.baseURI || self.location.href;`
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| 105 | ])
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| 106 | : "// no baseURI",
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| 107 | "",
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| 108 | "// object to store loaded and loading chunks",
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| 109 | "// undefined = chunk not loaded, null = chunk preloaded/prefetched",
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| 110 | "// [resolve, reject, Promise] = chunk loading, 0 = chunk loaded",
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| 111 | "var installedChunks = {",
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| 112 | Template.indent(
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| 113 | Array.from(initialChunkIds, id => `${JSON.stringify(id)}: 0`).join(
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| 114 | ",\n"
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| 115 | )
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| 116 | ),
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| 117 | "};",
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| 118 | "",
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| 119 | withLoading
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| 120 | ? Template.asString([
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| 121 | `${fn}.j = ${runtimeTemplate.basicFunction(
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| 122 | "chunkId, promises",
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| 123 | hasJsMatcher !== false
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| 124 | ? Template.indent([
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| 125 | "// JSONP chunk loading for javascript",
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| 126 | `var installedChunkData = ${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) ? installedChunks[chunkId] : undefined;`,
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| 127 | 'if(installedChunkData !== 0) { // 0 means "already installed".',
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| 128 | Template.indent([
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| 129 | "",
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| 130 | '// a Promise means "currently loading".',
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| 131 | "if(installedChunkData) {",
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| 132 | Template.indent([
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| 133 | "promises.push(installedChunkData[2]);"
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| 134 | ]),
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| 135 | "} else {",
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| 136 | Template.indent([
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| 137 | hasJsMatcher === true
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| 138 | ? "if(true) { // all chunks have JS"
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| 139 | : `if(${hasJsMatcher("chunkId")}) {`,
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| 140 | Template.indent([
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| 141 | "// setup Promise in chunk cache",
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| 142 | `var promise = new Promise(${runtimeTemplate.expressionFunction(
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| 143 | `installedChunkData = installedChunks[chunkId] = [resolve, reject]`,
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| 144 | "resolve, reject"
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| 145 | )});`,
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| 146 | "promises.push(installedChunkData[2] = promise);",
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| 147 | "",
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| 148 | "// start chunk loading",
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| 149 | `var url = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkScriptFilename}(chunkId);`,
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| 150 | "// create error before stack unwound to get useful stacktrace later",
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| 151 | "var error = new Error();",
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| 152 | `var loadingEnded = ${runtimeTemplate.basicFunction(
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| 153 | "event",
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| 154 | [
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| 155 | `if(${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId)) {`,
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| 156 | Template.indent([
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| 157 | "installedChunkData = installedChunks[chunkId];",
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| 158 | "if(installedChunkData !== 0) installedChunks[chunkId] = undefined;",
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| 159 | "if(installedChunkData) {",
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| 160 | Template.indent([
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| 161 | "var errorType = event && (event.type === 'load' ? 'missing' : event.type);",
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| 162 | "var realSrc = event && event.target && event.target.src;",
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| 163 | "error.message = 'Loading chunk ' + chunkId + ' failed.\\n(' + errorType + ': ' + realSrc + ')';",
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| 164 | "error.name = 'ChunkLoadError';",
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| 165 | "error.type = errorType;",
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| 166 | "error.request = realSrc;",
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| 167 | "installedChunkData[1](error);"
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| 168 | ]),
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| 169 | "}"
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| 170 | ]),
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| 171 | "}"
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| 172 | ]
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| 173 | )};`,
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| 174 | `${RuntimeGlobals.loadScript}(url, loadingEnded, "chunk-" + chunkId, chunkId);`
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| 175 | ]),
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| 176 | "} else installedChunks[chunkId] = 0;"
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| 177 | ]),
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| 178 | "}"
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| 179 | ]),
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| 180 | "}"
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| 181 | ])
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| 182 | : Template.indent(["installedChunks[chunkId] = 0;"])
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| 183 | )};`
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| 184 | ])
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| 185 | : "// no chunk on demand loading",
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| 186 | "",
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| 187 | withPrefetch && hasJsMatcher !== false
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| 188 | ? `${
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| 189 | RuntimeGlobals.prefetchChunkHandlers
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| 190 | }.j = ${runtimeTemplate.basicFunction("chunkId", [
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| 191 | `if((!${
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| 192 | RuntimeGlobals.hasOwnProperty
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| 193 | }(installedChunks, chunkId) || installedChunks[chunkId] === undefined) && ${
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| 194 | hasJsMatcher === true ? "true" : hasJsMatcher("chunkId")
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| 195 | }) {`,
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| 196 | Template.indent([
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| 197 | "installedChunks[chunkId] = null;",
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| 198 | linkPrefetch.call(
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| 199 | Template.asString([
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| 200 | "var link = document.createElement('link');",
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| 201 | crossOriginLoading
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| 202 | ? `link.crossOrigin = ${JSON.stringify(
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| 203 | crossOriginLoading
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| 204 | )};`
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| 205 | : "",
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| 206 | `if (${RuntimeGlobals.scriptNonce}) {`,
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| 207 | Template.indent(
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| 208 | `link.setAttribute("nonce", ${RuntimeGlobals.scriptNonce});`
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| 209 | ),
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| 210 | "}",
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| 211 | 'link.rel = "prefetch";',
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| 212 | 'link.as = "script";',
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| 213 | `link.href = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkScriptFilename}(chunkId);`
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| 214 | ]),
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| 215 | chunk
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| 216 | ),
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| 217 | "document.head.appendChild(link);"
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| 218 | ]),
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| 219 | "}"
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| 220 | ])};`
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| 221 | : "// no prefetching",
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| 222 | "",
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| 223 | withPreload && hasJsMatcher !== false
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| 224 | ? `${
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| 225 | RuntimeGlobals.preloadChunkHandlers
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| 226 | }.j = ${runtimeTemplate.basicFunction("chunkId", [
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| 227 | `if((!${
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| 228 | RuntimeGlobals.hasOwnProperty
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| 229 | }(installedChunks, chunkId) || installedChunks[chunkId] === undefined) && ${
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| 230 | hasJsMatcher === true ? "true" : hasJsMatcher("chunkId")
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| 231 | }) {`,
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| 232 | Template.indent([
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| 233 | "installedChunks[chunkId] = null;",
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| 234 | linkPreload.call(
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| 235 | Template.asString([
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| 236 | "var link = document.createElement('link');",
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| 237 | scriptType
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| 238 | ? `link.type = ${JSON.stringify(scriptType)};`
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| 239 | : "",
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| 240 | "link.charset = 'utf-8';",
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| 241 | `if (${RuntimeGlobals.scriptNonce}) {`,
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| 242 | Template.indent(
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| 243 | `link.setAttribute("nonce", ${RuntimeGlobals.scriptNonce});`
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| 244 | ),
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| 245 | "}",
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| 246 | 'link.rel = "preload";',
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| 247 | 'link.as = "script";',
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| 248 | `link.href = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkScriptFilename}(chunkId);`,
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| 249 | crossOriginLoading
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| 250 | ? Template.asString([
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| 251 | "if (link.href.indexOf(window.location.origin + '/') !== 0) {",
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| 252 | Template.indent(
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| 253 | `link.crossOrigin = ${JSON.stringify(
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| 254 | crossOriginLoading
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| 255 | )};`
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| 256 | ),
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| 257 | "}"
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| 258 | ])
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| 259 | : ""
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| 260 | ]),
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| 261 | chunk
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| 262 | ),
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| 263 | "document.head.appendChild(link);"
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| 264 | ]),
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| 265 | "}"
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| 266 | ])};`
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| 267 | : "// no preloaded",
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| 268 | "",
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| 269 | withHmr
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| 270 | ? Template.asString([
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| 271 | "var currentUpdatedModulesList;",
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| 272 | "var waitingUpdateResolves = {};",
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| 273 | "function loadUpdateChunk(chunkId) {",
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| 274 | Template.indent([
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| 275 | `return new Promise(${runtimeTemplate.basicFunction(
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| 276 | "resolve, reject",
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| 277 | [
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| 278 | "waitingUpdateResolves[chunkId] = resolve;",
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| 279 | "// start update chunk loading",
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| 280 | `var url = ${RuntimeGlobals.publicPath} + ${RuntimeGlobals.getChunkUpdateScriptFilename}(chunkId);`,
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| 281 | "// create error before stack unwound to get useful stacktrace later",
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| 282 | "var error = new Error();",
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| 283 | `var loadingEnded = ${runtimeTemplate.basicFunction("event", [
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| 284 | "if(waitingUpdateResolves[chunkId]) {",
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| 285 | Template.indent([
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| 286 | "waitingUpdateResolves[chunkId] = undefined",
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| 287 | "var errorType = event && (event.type === 'load' ? 'missing' : event.type);",
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| 288 | "var realSrc = event && event.target && event.target.src;",
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| 289 | "error.message = 'Loading hot update chunk ' + chunkId + ' failed.\\n(' + errorType + ': ' + realSrc + ')';",
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| 290 | "error.name = 'ChunkLoadError';",
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| 291 | "error.type = errorType;",
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| 292 | "error.request = realSrc;",
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| 293 | "reject(error);"
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| 294 | ]),
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| 295 | "}"
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| 296 | ])};`,
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| 297 | `${RuntimeGlobals.loadScript}(url, loadingEnded);`
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| 298 | ]
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| 299 | )});`
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| 300 | ]),
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| 301 | "}",
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| 302 | "",
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| 303 | `${globalObject}[${JSON.stringify(
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| 304 | hotUpdateGlobal
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| 305 | )}] = ${runtimeTemplate.basicFunction(
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| 306 | "chunkId, moreModules, runtime",
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| 307 | [
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| 308 | "for(var moduleId in moreModules) {",
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| 309 | Template.indent([
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| 310 | `if(${RuntimeGlobals.hasOwnProperty}(moreModules, moduleId)) {`,
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| 311 | Template.indent([
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| 312 | "currentUpdate[moduleId] = moreModules[moduleId];",
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| 313 | "if(currentUpdatedModulesList) currentUpdatedModulesList.push(moduleId);"
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| 314 | ]),
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| 315 | "}"
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| 316 | ]),
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| 317 | "}",
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| 318 | "if(runtime) currentUpdateRuntime.push(runtime);",
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| 319 | "if(waitingUpdateResolves[chunkId]) {",
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| 320 | Template.indent([
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| 321 | "waitingUpdateResolves[chunkId]();",
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| 322 | "waitingUpdateResolves[chunkId] = undefined;"
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| 323 | ]),
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| 324 | "}"
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| 325 | ]
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| 326 | )};`,
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| 327 | "",
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| 328 | Template.getFunctionContent(
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| 329 | require("../hmr/JavascriptHotModuleReplacement.runtime.js")
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| 330 | )
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| 331 | .replace(/\$key\$/g, "jsonp")
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| 332 | .replace(/\$installedChunks\$/g, "installedChunks")
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| 333 | .replace(/\$loadUpdateChunk\$/g, "loadUpdateChunk")
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| 334 | .replace(/\$moduleCache\$/g, RuntimeGlobals.moduleCache)
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| 335 | .replace(/\$moduleFactories\$/g, RuntimeGlobals.moduleFactories)
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| 336 | .replace(
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| 337 | /\$ensureChunkHandlers\$/g,
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| 338 | RuntimeGlobals.ensureChunkHandlers
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| 339 | )
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| 340 | .replace(/\$hasOwnProperty\$/g, RuntimeGlobals.hasOwnProperty)
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| 341 | .replace(/\$hmrModuleData\$/g, RuntimeGlobals.hmrModuleData)
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| 342 | .replace(
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| 343 | /\$hmrDownloadUpdateHandlers\$/g,
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| 344 | RuntimeGlobals.hmrDownloadUpdateHandlers
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| 345 | )
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| 346 | .replace(
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| 347 | /\$hmrInvalidateModuleHandlers\$/g,
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| 348 | RuntimeGlobals.hmrInvalidateModuleHandlers
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| 349 | )
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| 350 | ])
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| 351 | : "// no HMR",
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| 352 | "",
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| 353 | withHmrManifest
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| 354 | ? Template.asString([
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| 355 | `${
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| 356 | RuntimeGlobals.hmrDownloadManifest
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| 357 | } = ${runtimeTemplate.basicFunction("", [
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| 358 | 'if (typeof fetch === "undefined") throw new Error("No browser support: need fetch API");',
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| 359 | `return fetch(${RuntimeGlobals.publicPath} + ${
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| 360 | RuntimeGlobals.getUpdateManifestFilename
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| 361 | }()).then(${runtimeTemplate.basicFunction("response", [
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| 362 | "if(response.status === 404) return; // no update available",
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| 363 | 'if(!response.ok) throw new Error("Failed to fetch update manifest " + response.statusText);',
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| 364 | "return response.json();"
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| 365 | ])});`
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| 366 | ])};`
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| 367 | ])
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| 368 | : "// no HMR manifest",
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| 369 | "",
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| 370 | withOnChunkLoad
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| 371 | ? `${
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| 372 | RuntimeGlobals.onChunksLoaded
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| 373 | }.j = ${runtimeTemplate.returningFunction(
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| 374 | "installedChunks[chunkId] === 0",
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| 375 | "chunkId"
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| 376 | )};`
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| 377 | : "// no on chunks loaded",
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| 378 | "",
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| 379 | withCallback || withLoading
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| 380 | ? Template.asString([
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| 381 | "// install a JSONP callback for chunk loading",
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| 382 | `var webpackJsonpCallback = ${runtimeTemplate.basicFunction(
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| 383 | "parentChunkLoadingFunction, data",
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| 384 | [
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| 385 | runtimeTemplate.destructureArray(
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| 386 | ["chunkIds", "moreModules", "runtime"],
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| 387 | "data"
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| 388 | ),
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| 389 | '// add "moreModules" to the modules object,',
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| 390 | '// then flag all "chunkIds" as loaded and fire callback',
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| 391 | "var moduleId, chunkId, i = 0;",
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| 392 | "for(moduleId in moreModules) {",
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| 393 | Template.indent([
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| 394 | `if(${RuntimeGlobals.hasOwnProperty}(moreModules, moduleId)) {`,
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| 395 | Template.indent(
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| 396 | `${RuntimeGlobals.moduleFactories}[moduleId] = moreModules[moduleId];`
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| 397 | ),
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| 398 | "}"
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| 399 | ]),
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| 400 | "}",
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| 401 | "if(runtime) var result = runtime(__webpack_require__);",
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| 402 | "if(parentChunkLoadingFunction) parentChunkLoadingFunction(data);",
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| 403 | "for(;i < chunkIds.length; i++) {",
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| 404 | Template.indent([
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| 405 | "chunkId = chunkIds[i];",
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| 406 | `if(${RuntimeGlobals.hasOwnProperty}(installedChunks, chunkId) && installedChunks[chunkId]) {`,
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| 407 | Template.indent("installedChunks[chunkId][0]();"),
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| 408 | "}",
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| 409 | "installedChunks[chunkIds[i]] = 0;"
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| 410 | ]),
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| 411 | "}",
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| 412 | withOnChunkLoad
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| 413 | ? `return ${RuntimeGlobals.onChunksLoaded}(result);`
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| 414 | : ""
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| 415 | ]
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| 416 | )}`,
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| 417 | "",
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| 418 | `var chunkLoadingGlobal = ${chunkLoadingGlobalExpr} = ${chunkLoadingGlobalExpr} || [];`,
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| 419 | "chunkLoadingGlobal.forEach(webpackJsonpCallback.bind(null, 0));",
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| 420 | "chunkLoadingGlobal.push = webpackJsonpCallback.bind(null, chunkLoadingGlobal.push.bind(chunkLoadingGlobal));"
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| 421 | ])
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| 422 | : "// no jsonp function"
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| 423 | ]);
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| 424 | }
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| 425 | }
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| 426 |
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| 427 | module.exports = JsonpChunkLoadingRuntimeModule;
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