mirror of https://github.com/webpack/webpack.git
61 lines
1.8 KiB
JavaScript
61 lines
1.8 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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*/
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"use strict";
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const RuntimeGlobals = require("../RuntimeGlobals");
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const RuntimeModule = require("../RuntimeModule");
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const Template = require("../Template");
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/** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */
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class ChunkPrefetchTriggerRuntimeModule extends RuntimeModule {
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/**
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* @param {string} childType TODO
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* @param {string} runtimeFunction TODO
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* @param {Object} chunkMap map from chunk to
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* @param {boolean} afterChunkLoad true: start after chunk has been loaded, false: start after chunk loading has started
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*/
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constructor(childType, runtimeFunction, chunkMap, afterChunkLoad) {
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super(`chunk ${childType} trigger`, 20);
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this.childType = childType;
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this.runtimeFunction = runtimeFunction;
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this.chunkMap = chunkMap;
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this.afterChunkLoad = afterChunkLoad;
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}
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/**
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* @returns {string} runtime code
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*/
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generate() {
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const { childType, runtimeFunction, chunkMap, afterChunkLoad } = this;
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const { runtimeTemplate } = this.compilation;
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const body = [
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"var chunks = chunkToChildrenMap[chunkId];",
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"for (var i = 0; Array.isArray(chunks) && i < chunks.length; i++) {",
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Template.indent(`${runtimeFunction}(chunks[i]);`),
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"}"
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];
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return Template.asString([
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chunkMap
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? Template.asString([
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`var chunkToChildrenMap = ${JSON.stringify(chunkMap, null, "\t")};`,
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`${RuntimeGlobals.ensureChunkHandlers}.${childType} = ${
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afterChunkLoad
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? runtimeTemplate.basicFunction("chunkId, promises", [
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`Promise.all(promises).then(${runtimeTemplate.basicFunction(
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"",
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body
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)});`
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])
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: runtimeTemplate.basicFunction("chunkId", body)
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};`
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])
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: `// no chunks to automatically ${childType} specified in graph`
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]);
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}
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}
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module.exports = ChunkPrefetchTriggerRuntimeModule;
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