init

马宇豪

2024-07-16 f591c27b57e2418c9495bc02ae8cfff84d35bc18

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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 ChunkPreloadTriggerRuntimeModule extends RuntimeModule {
    /**
     * @param {Record<string|number, (string|number)[]>} chunkMap map from chunk to chunks
     */
    constructor(chunkMap) {
        super(`chunk preload trigger`, RuntimeModule.STAGE_TRIGGER);
        this.chunkMap = chunkMap;
    }
 
    /**
     * @returns {string} runtime code
     */
    generate() {
        const { chunkMap } = this;
        const { runtimeTemplate } = this.compilation;
        const body = [
            "var chunks = chunkToChildrenMap[chunkId];",
            `Array.isArray(chunks) && chunks.map(${RuntimeGlobals.preloadChunk});`
        ];
        return Template.asString([
            Template.asString([
                `var chunkToChildrenMap = ${JSON.stringify(chunkMap, null, "\t")};`,
                `${
                    RuntimeGlobals.ensureChunkHandlers
                }.preload = ${runtimeTemplate.basicFunction("chunkId", body)};`
            ])
        ]);
    }
}
 
module.exports = ChunkPreloadTriggerRuntimeModule;