ChunkPrefetchStartupRuntimeModule.js
a00ef2159c6ereact18

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

			"use strict";

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

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

			class ChunkPrefetchStartupRuntimeModule extends RuntimeModule {
			/**
			* @param {string} childType TODO
			* @param {string} runtimeFunction TODO
			* @param {(string\|number)[]} startupChunks chunk ids to trigger after startup
			*/
			constructor(childType, runtimeFunction, startupChunks) {
			super(`startup ${childType}`, RuntimeModule.STAGE_TRIGGER);
			this.childType = childType;
			this.runtimeFunction = runtimeFunction;
			this.startupChunks = startupChunks;
			}

			/**
			* @returns {string} runtime code
			*/
			generate() {
			const { runtimeFunction, startupChunks } = this;
			const { runtimeTemplate } = this.compilation;
			return Template.asString([
			`var startup = ${RuntimeGlobals.startup};`,
			`${RuntimeGlobals.startup} = ${runtimeTemplate.basicFunction("", [
			"var result = startup();",
			Template.asString(
			startupChunks.length < 3
			? startupChunks.map(
			c => `${runtimeFunction}(${JSON.stringify(c)});`
			)
			: `${JSON.stringify(startupChunks)}.map(${runtimeFunction});`
			),
			"return result;"
			])};`
			]);
			}
			}

			module.exports = ChunkPrefetchStartupRuntimeModule;