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2 years ago
/*
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;