source: frontend/node_modules/webpack/lib/runtime/StartupEntrypointRuntimeModule.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
*/

"use strict";

const RuntimeGlobals = require("../RuntimeGlobals");
const RuntimeModule = require("../RuntimeModule");

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

class StartupEntrypointRuntimeModule extends RuntimeModule {
        /**
         * @param {boolean} asyncChunkLoading use async chunk loading
         */
        constructor(asyncChunkLoading) {
                super("startup entrypoint");
                /** @type {boolean} */
                this.asyncChunkLoading = asyncChunkLoading;
        }

        /**
         * Generates runtime code for this runtime module.
         * @returns {string | null} runtime code
         */
        generate() {
                const compilation = /** @type {Compilation} */ (this.compilation);
                const { runtimeTemplate } = compilation;
                return `${
                        RuntimeGlobals.startupEntrypoint
                } = ${runtimeTemplate.basicFunction("result, chunkIds, fn", [
                        "// arguments: chunkIds, moduleId are deprecated",
                        "var moduleId = chunkIds;",
                        `if(!fn) chunkIds = result, fn = ${runtimeTemplate.returningFunction(
                                `${RuntimeGlobals.require}(${RuntimeGlobals.entryModuleId} = moduleId)`
                        )};`,
                        ...(this.asyncChunkLoading
                                ? [
                                                `return Promise.all(chunkIds.map(${RuntimeGlobals.ensureChunk}, ${
                                                        RuntimeGlobals.require
                                                })).then(${runtimeTemplate.basicFunction("", [
                                                        "var r = fn();",
                                                        "return r === undefined ? result : r;"
                                                ])})`
                                        ]
                                : [
                                                `chunkIds.map(${RuntimeGlobals.ensureChunk}, ${RuntimeGlobals.require})`,
                                                "var r = fn();",
                                                "return r === undefined ? result : r;"
                                        ])
                ])}`;
        }
}

module.exports = StartupEntrypointRuntimeModule;