source: frontend/node_modules/webpack/lib/optimize/RuntimeChunkPlugin.js

/*
        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 */

const PLUGIN_NAME = "RuntimeChunkPlugin";

/** @typedef {(entrypoint: { name: string }) => string} RuntimeChunkFunction */

class RuntimeChunkPlugin {
        /**
         * Creates an instance of RuntimeChunkPlugin.
         * @param {{ name?: RuntimeChunkFunction }=} options options
         */
        constructor(options = {}) {
                /** @type {{ name: string | RuntimeChunkFunction }} */
                this.options = {
                        name: (entrypoint) => `runtime~${entrypoint.name}`,
                        ...options
                };
        }

        /**
         * Applies the plugin by registering its hooks on the compiler.
         * @param {Compiler} compiler the compiler instance
         * @returns {void}
         */
        apply(compiler) {
                compiler.hooks.thisCompilation.tap(PLUGIN_NAME, (compilation) => {
                        compilation.hooks.addEntry.tap(PLUGIN_NAME, (_, { 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 = this.options.name;
                                        if (typeof name === "function") {
                                                name = name({ name: entryName });
                                        }
                                        data.options.runtime = name;
                                }
                        });
                });
        }
}

module.exports = RuntimeChunkPlugin;