webpack
Version:
Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.
61 lines (54 loc) • 1.89 kB
JavaScript
/*
MIT License http://www.opensource.org/licenses/mit-license.php
*/
;
const RuntimeGlobals = require("../RuntimeGlobals");
const RuntimeModule = require("../RuntimeModule");
const Template = require("../Template");
/** @typedef {import("../RuntimeTemplate")} RuntimeTemplate */
class ChunkPrefetchTriggerRuntimeModule extends RuntimeModule {
/**
* @param {string} childType TODO
* @param {string} runtimeFunction TODO
* @param {Object} chunkMap map from chunk to
* @param {boolean} afterChunkLoad true: start after chunk has been loaded, false: start after chunk loading has started
*/
constructor(childType, runtimeFunction, chunkMap, afterChunkLoad) {
super(`chunk ${childType} trigger`, 20);
this.childType = childType;
this.runtimeFunction = runtimeFunction;
this.chunkMap = chunkMap;
this.afterChunkLoad = afterChunkLoad;
}
/**
* @returns {string} runtime code
*/
generate() {
const { childType, runtimeFunction, chunkMap, afterChunkLoad } = this;
const { runtimeTemplate } = this.compilation;
const body = [
"var chunks = chunkToChildrenMap[chunkId];",
"for (var i = 0; Array.isArray(chunks) && i < chunks.length; i++) {",
Template.indent(`${runtimeFunction}(chunks[i]);`),
"}"
];
return Template.asString([
chunkMap
? Template.asString([
`var chunkToChildrenMap = ${JSON.stringify(chunkMap, null, "\t")};`,
`${RuntimeGlobals.ensureChunkHandlers}.${childType} = ${
afterChunkLoad
? runtimeTemplate.basicFunction("chunkId, promises", [
`Promise.all(promises).then(${runtimeTemplate.basicFunction(
"",
body
)});`
])
: runtimeTemplate.basicFunction("chunkId", body)
};`
])
: `// no chunks to automatically ${childType} specified in graph`
]);
}
}
module.exports = ChunkPrefetchTriggerRuntimeModule;