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

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

"use strict";

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

class RuntimeChunkPlugin {
	/**
	 * @param {{ name?: (entrypoint: { name: string }) => string }} options options
	 */
	constructor(options) {
		this.options = {
			/**
			 * @param {Entrypoint} entrypoint entrypoint name
			 * @returns {string} runtime chunk name
			 */
			name: entrypoint => `runtime~${entrypoint.name}`,
			...options
		};
	}

	/**
	 * Apply the plugin
	 * @param {Compiler} compiler the compiler instance
	 * @returns {void}
	 */
	apply(compiler) {
		compiler.hooks.thisCompilation.tap("RuntimeChunkPlugin", compilation => {
			compilation.hooks.addEntry.tap(
				"RuntimeChunkPlugin",
				(_, { name: entryName }) => {
					if (entryName === undefined) return;
					const data =
						/** @type {EntryData} */
						(compilation.entries.get(entryName));
					if (data.options.runtime === undefined && !data.options.dependOn) {
						// Determine runtime chunk name
						let name =
							/** @type {string | ((entrypoint: { name: string }) => string)} */
							(this.options.name);
						if (typeof name === "function") {
							name = name({ name: entryName });
						}
						data.options.runtime = name;
					}
				}
			);
		});
	}
}

module.exports = RuntimeChunkPlugin;