gree_leran/node_modules/webpack/lib/prefetch/ChunkPrefetchTriggerRuntime...

52 lines
1.4 KiB
JavaScript

/*
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("../Compilation")} Compilation */
/** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */
class ChunkPrefetchTriggerRuntimeModule extends RuntimeModule {
/**
* @param {Record<string|number, (string|number)[]>} chunkMap map from chunk to
*/
constructor(chunkMap) {
super(`chunk prefetch trigger`, RuntimeModule.STAGE_TRIGGER);
this.chunkMap = chunkMap;
}
/**
* @returns {string | null} runtime code
*/
generate() {
const { chunkMap } = this;
const compilation = /** @type {Compilation} */ (this.compilation);
const { runtimeTemplate } = compilation;
const body = [
"var chunks = chunkToChildrenMap[chunkId];",
`Array.isArray(chunks) && chunks.map(${RuntimeGlobals.prefetchChunk});`
];
return Template.asString([
Template.asString([
`var chunkToChildrenMap = ${JSON.stringify(chunkMap, null, "\t")};`,
`${
RuntimeGlobals.ensureChunkHandlers
}.prefetch = ${runtimeTemplate.expressionFunction(
`Promise.all(promises).then(${runtimeTemplate.basicFunction(
"",
body
)})`,
"chunkId, promises"
)};`
])
]);
}
}
module.exports = ChunkPrefetchTriggerRuntimeModule;