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6 | "use strict";
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7 |
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8 | const { RawSource } = require("webpack-sources");
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9 | const AsyncDependenciesBlock = require("../AsyncDependenciesBlock");
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10 | const Dependency = require("../Dependency");
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11 | const Module = require("../Module");
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12 | const ModuleFactory = require("../ModuleFactory");
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13 | const RuntimeGlobals = require("../RuntimeGlobals");
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14 | const Template = require("../Template");
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15 | const CommonJsRequireDependency = require("../dependencies/CommonJsRequireDependency");
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16 | const { registerNotSerializable } = require("../util/serialization");
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17 |
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18 |
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19 |
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20 |
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21 |
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22 |
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23 |
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24 |
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25 |
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26 |
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27 |
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28 |
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29 |
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30 |
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31 |
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32 |
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33 |
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34 |
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35 |
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36 |
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37 |
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38 |
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39 |
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40 |
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41 |
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42 | const HMR_DEPENDENCY_TYPES = new Set([
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43 | "import.meta.webpackHot.accept",
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44 | "import.meta.webpackHot.decline",
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45 | "module.hot.accept",
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46 | "module.hot.decline"
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47 | ]);
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48 |
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49 |
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50 |
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51 |
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52 |
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53 |
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54 | const checkTest = (test, module) => {
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55 | if (test === undefined) return true;
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56 | if (typeof test === "function") {
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57 | return test(module);
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58 | }
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59 | if (typeof test === "string") {
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60 | const name = module.nameForCondition();
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61 | return name && name.startsWith(test);
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62 | }
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63 | if (test instanceof RegExp) {
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64 | const name = module.nameForCondition();
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65 | return name && test.test(name);
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66 | }
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67 | return false;
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68 | };
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69 |
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70 | const TYPES = new Set(["javascript"]);
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71 |
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72 | class LazyCompilationDependency extends Dependency {
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73 | constructor(proxyModule) {
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74 | super();
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75 | this.proxyModule = proxyModule;
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76 | }
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77 |
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78 | get category() {
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79 | return "esm";
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80 | }
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81 |
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82 | get type() {
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83 | return "lazy import()";
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84 | }
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85 |
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86 | |
87 |
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88 |
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89 | getResourceIdentifier() {
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90 | return this.proxyModule.originalModule.identifier();
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91 | }
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92 | }
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93 |
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94 | registerNotSerializable(LazyCompilationDependency);
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95 |
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96 | class LazyCompilationProxyModule extends Module {
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97 | constructor(context, originalModule, request, client, data, active) {
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98 | super("lazy-compilation-proxy", context, originalModule.layer);
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99 | this.originalModule = originalModule;
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100 | this.request = request;
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101 | this.client = client;
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102 | this.data = data;
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103 | this.active = active;
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104 | }
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105 |
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106 | |
107 |
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108 |
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109 | identifier() {
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110 | return `lazy-compilation-proxy|${this.originalModule.identifier()}`;
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111 | }
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112 |
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113 | |
114 |
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115 |
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116 |
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117 | readableIdentifier(requestShortener) {
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118 | return `lazy-compilation-proxy ${this.originalModule.readableIdentifier(
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119 | requestShortener
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120 | )}`;
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121 | }
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122 |
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123 | |
124 |
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125 |
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126 |
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127 |
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128 |
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129 |
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130 | updateCacheModule(module) {
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131 | super.updateCacheModule(module);
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132 | const m = (module);
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133 | this.originalModule = m.originalModule;
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134 | this.request = m.request;
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135 | this.client = m.client;
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136 | this.data = m.data;
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137 | this.active = m.active;
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138 | }
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139 |
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140 | |
141 |
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142 |
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143 |
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144 | libIdent(options) {
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145 | return `${this.originalModule.libIdent(options)}!lazy-compilation-proxy`;
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146 | }
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147 |
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148 | |
149 |
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150 |
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151 |
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152 |
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153 | needBuild(context, callback) {
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154 | callback(null, !this.buildInfo || this.buildInfo.active !== this.active);
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155 | }
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156 |
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157 | |
158 |
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159 |
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160 |
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161 |
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162 |
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163 |
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164 |
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165 | build(options, compilation, resolver, fs, callback) {
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166 | this.buildInfo = {
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167 | active: this.active
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168 | };
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169 |
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170 | this.buildMeta = {};
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171 | this.clearDependenciesAndBlocks();
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172 | const dep = new CommonJsRequireDependency(this.client);
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173 | this.addDependency(dep);
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174 | if (this.active) {
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175 | const dep = new LazyCompilationDependency(this);
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176 | const block = new AsyncDependenciesBlock({});
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177 | block.addDependency(dep);
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178 | this.addBlock(block);
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179 | }
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180 | callback();
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181 | }
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182 |
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183 | |
184 |
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185 |
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186 | getSourceTypes() {
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187 | return TYPES;
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188 | }
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189 |
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190 | |
191 |
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192 |
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193 |
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194 | size(type) {
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195 | return 200;
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196 | }
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197 |
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198 | |
199 |
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200 |
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201 |
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202 | codeGeneration({ runtimeTemplate, chunkGraph, moduleGraph }) {
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203 | const sources = new Map();
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204 | const runtimeRequirements = new Set();
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205 | runtimeRequirements.add(RuntimeGlobals.module);
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206 | const clientDep = (
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207 | this.dependencies[0]
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208 | );
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209 | const clientModule = moduleGraph.getModule(clientDep);
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210 | const block = this.blocks[0];
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211 | const client = Template.asString([
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212 | `var client = ${runtimeTemplate.moduleExports({
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213 | module: clientModule,
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214 | chunkGraph,
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215 | request: clientDep.userRequest,
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216 | runtimeRequirements
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217 | })}`,
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218 | `var data = ${JSON.stringify(this.data)};`
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219 | ]);
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220 | const keepActive = Template.asString([
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221 | `var dispose = client.keepAlive({ data: data, active: ${JSON.stringify(
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222 | !!block
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223 | )}, module: module, onError: onError });`
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224 | ]);
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225 | let source;
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226 | if (block) {
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227 | const dep = block.dependencies[0];
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228 | const module = moduleGraph.getModule(dep);
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229 | source = Template.asString([
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230 | client,
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231 | `module.exports = ${runtimeTemplate.moduleNamespacePromise({
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232 | chunkGraph,
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233 | block,
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234 | module,
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235 | request: this.request,
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236 | strict: false, // TODO this should be inherited from the original module
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237 | message: "import()",
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238 | runtimeRequirements
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239 | })};`,
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240 | "if (module.hot) {",
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241 | Template.indent([
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242 | "module.hot.accept();",
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243 | `module.hot.accept(${JSON.stringify(
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244 | chunkGraph.getModuleId(module)
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245 | )}, function() { module.hot.invalidate(); });`,
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246 | "module.hot.dispose(function(data) { delete data.resolveSelf; dispose(data); });",
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247 | "if (module.hot.data && module.hot.data.resolveSelf) module.hot.data.resolveSelf(module.exports);"
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248 | ]),
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249 | "}",
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250 | "function onError() { /* ignore */ }",
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251 | keepActive
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252 | ]);
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253 | } else {
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254 | source = Template.asString([
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255 | client,
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256 | "var resolveSelf, onError;",
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257 | `module.exports = new Promise(function(resolve, reject) { resolveSelf = resolve; onError = reject; });`,
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258 | "if (module.hot) {",
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259 | Template.indent([
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260 | "module.hot.accept();",
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261 | "if (module.hot.data && module.hot.data.resolveSelf) module.hot.data.resolveSelf(module.exports);",
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262 | "module.hot.dispose(function(data) { data.resolveSelf = resolveSelf; dispose(data); });"
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263 | ]),
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264 | "}",
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265 | keepActive
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266 | ]);
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267 | }
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268 | sources.set("javascript", new RawSource(source));
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269 | return {
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270 | sources,
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271 | runtimeRequirements
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272 | };
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273 | }
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274 |
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275 | |
276 |
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277 |
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278 |
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279 |
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280 | updateHash(hash, context) {
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281 | super.updateHash(hash, context);
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282 | hash.update(this.active ? "active" : "");
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283 | hash.update(JSON.stringify(this.data));
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284 | }
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285 | }
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286 |
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287 | registerNotSerializable(LazyCompilationProxyModule);
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288 |
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289 | class LazyCompilationDependencyFactory extends ModuleFactory {
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290 | constructor(factory) {
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291 | super();
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292 | this._factory = factory;
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293 | }
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294 |
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295 | |
296 |
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297 |
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298 |
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299 |
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300 | create(data, callback) {
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301 | const dependency = (
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302 | data.dependencies[0]
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303 | );
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304 | callback(null, {
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305 | module: dependency.proxyModule.originalModule
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306 | });
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307 | }
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308 | }
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309 |
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310 | class LazyCompilationPlugin {
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311 | |
312 |
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313 |
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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 | constructor({ backend, entries, imports, test }) {
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319 | this.backend = backend;
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320 | this.entries = entries;
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321 | this.imports = imports;
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322 | this.test = test;
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323 | }
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324 | |
325 |
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326 |
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327 |
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328 |
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329 | apply(compiler) {
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330 | let backend;
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331 | compiler.hooks.beforeCompile.tapAsync(
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332 | "LazyCompilationPlugin",
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333 | (params, callback) => {
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334 | if (backend !== undefined) return callback();
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335 | const promise = this.backend(compiler, (err, result) => {
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336 | if (err) return callback(err);
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337 | backend = result;
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338 | callback();
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339 | });
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340 | if (promise && promise.then) {
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341 | promise.then(b => {
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342 | backend = b;
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343 | callback();
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344 | }, callback);
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345 | }
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346 | }
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347 | );
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348 | compiler.hooks.thisCompilation.tap(
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349 | "LazyCompilationPlugin",
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350 | (compilation, { normalModuleFactory }) => {
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351 | normalModuleFactory.hooks.module.tap(
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352 | "LazyCompilationPlugin",
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353 | (originalModule, createData, resolveData) => {
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354 | if (
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355 | resolveData.dependencies.every(dep =>
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356 | HMR_DEPENDENCY_TYPES.has(dep.type)
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357 | )
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358 | ) {
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359 |
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360 |
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361 | const hmrDep = resolveData.dependencies[0];
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362 | const originModule =
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363 | compilation.moduleGraph.getParentModule(hmrDep);
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364 | const isReferringToDynamicImport = originModule.blocks.some(
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365 | block =>
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366 | block.dependencies.some(
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367 | dep =>
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368 | dep.type === "import()" &&
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369 | (dep).request ===
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370 | hmrDep.request
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371 | )
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372 | );
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373 | if (!isReferringToDynamicImport) return;
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374 | } else if (
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375 | !resolveData.dependencies.every(
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376 | dep =>
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377 | HMR_DEPENDENCY_TYPES.has(dep.type) ||
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378 | (this.imports &&
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379 | (dep.type === "import()" ||
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380 | dep.type === "import() context element")) ||
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381 | (this.entries && dep.type === "entry")
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382 | )
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383 | )
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384 | return;
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385 | if (
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386 | /webpack[/\\]hot[/\\]|webpack-dev-server[/\\]client|webpack-hot-middleware[/\\]client/.test(
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387 | resolveData.request
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388 | ) ||
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389 | !checkTest(this.test, originalModule)
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390 | )
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391 | return;
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392 | const moduleInfo = backend.module(originalModule);
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393 | if (!moduleInfo) return;
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394 | const { client, data, active } = moduleInfo;
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395 |
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396 | return new LazyCompilationProxyModule(
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397 | compiler.context,
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398 | originalModule,
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399 | resolveData.request,
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400 | client,
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401 | data,
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402 | active
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403 | );
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404 | }
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405 | );
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406 | compilation.dependencyFactories.set(
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407 | LazyCompilationDependency,
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408 | new LazyCompilationDependencyFactory()
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409 | );
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410 | }
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411 | );
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412 | compiler.hooks.shutdown.tapAsync("LazyCompilationPlugin", callback => {
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413 | backend.dispose(callback);
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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 | module.exports = LazyCompilationPlugin;
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