webpack/lib/esm/ModuleChunkLoadingPlugin.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/

"use strict";

const RuntimeGlobals = require("../RuntimeGlobals");
const ExportWebpackRequireRuntimeModule = require("./ExportWebpackRequireRuntimeModule");
const ModuleChunkLoadingRuntimeModule = require("./ModuleChunkLoadingRuntimeModule");

/** @typedef {import("../Compiler")} Compiler */

class ModuleChunkLoadingPlugin {
	/**
	 * Apply the plugin
	 * @param {Compiler} compiler the compiler instance
	 * @returns {void}
	 */
	apply(compiler) {
		compiler.hooks.thisCompilation.tap(
			"ModuleChunkLoadingPlugin",
			compilation => {
				const globalChunkLoading = compilation.outputOptions.chunkLoading;
				const isEnabledForChunk = chunk => {
					const options = chunk.getEntryOptions();
					const chunkLoading =
						(options && options.chunkLoading) || globalChunkLoading;
					return chunkLoading === "import";
				};
				const onceForChunkSet = new WeakSet();
				const handler = (chunk, set) => {
					if (onceForChunkSet.has(chunk)) return;
					onceForChunkSet.add(chunk);
					if (!isEnabledForChunk(chunk)) return;
					set.add(RuntimeGlobals.moduleFactoriesAddOnly);
					set.add(RuntimeGlobals.hasOwnProperty);
					compilation.addRuntimeModule(
						chunk,
						new ModuleChunkLoadingRuntimeModule(set)
					);
				};
				compilation.hooks.runtimeRequirementInTree
					.for(RuntimeGlobals.ensureChunkHandlers)
					.tap("ModuleChunkLoadingPlugin", handler);
				compilation.hooks.runtimeRequirementInTree
					.for(RuntimeGlobals.baseURI)
					.tap("ModuleChunkLoadingPlugin", handler);
				compilation.hooks.runtimeRequirementInTree
					.for(RuntimeGlobals.externalInstallChunk)
					.tap("ModuleChunkLoadingPlugin", handler);
				compilation.hooks.runtimeRequirementInTree
					.for(RuntimeGlobals.onChunksLoaded)
					.tap("ModuleChunkLoadingPlugin", handler);
				compilation.hooks.runtimeRequirementInTree
					.for(RuntimeGlobals.externalInstallChunk)
					.tap("ModuleChunkLoadingPlugin", (chunk, set) => {
						if (!isEnabledForChunk(chunk)) return;
						compilation.addRuntimeModule(
							chunk,
							new ExportWebpackRequireRuntimeModule()
						);
					});

				compilation.hooks.runtimeRequirementInTree
					.for(RuntimeGlobals.ensureChunkHandlers)
					.tap("ModuleChunkLoadingPlugin", (chunk, set) => {
						if (!isEnabledForChunk(chunk)) return;
						set.add(RuntimeGlobals.getChunkScriptFilename);
					});
			}
		);
	}
}

module.exports = ModuleChunkLoadingPlugin;