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tahamajs/Other_Lessons / AP /TA_1 /AP-ECE-UT.github.io /node_modules /webpack /lib /AutomaticPrefetchPlugin.js
| /* | |
| MIT License http://www.opensource.org/licenses/mit-license.php | |
| Author Tobias Koppers @sokra | |
| */ | |
| ; | |
| const asyncLib = require("neo-async"); | |
| const NormalModule = require("./NormalModule"); | |
| const PrefetchDependency = require("./dependencies/PrefetchDependency"); | |
| /** @typedef {import("./Compiler")} Compiler */ | |
| class AutomaticPrefetchPlugin { | |
| /** | |
| * Apply the plugin | |
| * @param {Compiler} compiler the compiler instance | |
| * @returns {void} | |
| */ | |
| apply(compiler) { | |
| compiler.hooks.compilation.tap( | |
| "AutomaticPrefetchPlugin", | |
| (compilation, { normalModuleFactory }) => { | |
| compilation.dependencyFactories.set( | |
| PrefetchDependency, | |
| normalModuleFactory | |
| ); | |
| } | |
| ); | |
| /** @type {{context: string | null, request: string}[] | null} */ | |
| let lastModules = null; | |
| compiler.hooks.afterCompile.tap("AutomaticPrefetchPlugin", compilation => { | |
| lastModules = []; | |
| for (const m of compilation.modules) { | |
| if (m instanceof NormalModule) { | |
| lastModules.push({ | |
| context: m.context, | |
| request: m.request | |
| }); | |
| } | |
| } | |
| }); | |
| compiler.hooks.make.tapAsync( | |
| "AutomaticPrefetchPlugin", | |
| (compilation, callback) => { | |
| if (!lastModules) return callback(); | |
| asyncLib.each( | |
| lastModules, | |
| (m, callback) => { | |
| compilation.addModuleChain( | |
| m.context || compiler.context, | |
| new PrefetchDependency(`!!${m.request}`), | |
| callback | |
| ); | |
| }, | |
| err => { | |
| lastModules = null; | |
| callback(err); | |
| } | |
| ); | |
| } | |
| ); | |
| } | |
| } | |
| module.exports = AutomaticPrefetchPlugin; | |
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