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Entrypoint.js
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Mon, Nov 18, 08:14

Entrypoint.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const ChunkGroup = require("./ChunkGroup");
/** @typedef {import("../declarations/WebpackOptions").EntryDescriptionNormalized} EntryDescription */
/** @typedef {import("./Chunk")} Chunk */
/** @typedef {{ name?: string } & Omit<EntryDescription, "import">} EntryOptions */
/**
* Entrypoint serves as an encapsulation primitive for chunks that are
* a part of a single ChunkGroup. They represent all bundles that need to be loaded for a
* single instance of a page. Multi-page application architectures will typically yield multiple Entrypoint objects
* inside of the compilation, whereas a Single Page App may only contain one with many lazy-loaded chunks.
*/
class Entrypoint extends ChunkGroup {
/**
* Creates an instance of Entrypoint.
* @param {EntryOptions | string} entryOptions the options for the entrypoint (or name)
* @param {boolean=} initial false, when the entrypoint is not initial loaded
*/
constructor(entryOptions, initial = true) {
if (typeof entryOptions === "string") {
entryOptions = { name: entryOptions };
}
super({
name: entryOptions.name
});
this.options = entryOptions;
/** @type {Chunk=} */
this._runtimeChunk = undefined;
/** @type {Chunk=} */
this._entrypointChunk = undefined;
/** @type {boolean} */
this._initial = initial;
}
/**
* @returns {boolean} true, when this chunk group will be loaded on initial page load
*/
isInitial() {
return this._initial;
}
/**
* Sets the runtimeChunk for an entrypoint.
* @param {Chunk} chunk the chunk being set as the runtime chunk.
* @returns {void}
*/
setRuntimeChunk(chunk) {
this._runtimeChunk = chunk;
}
/**
* Fetches the chunk reference containing the webpack bootstrap code
* @returns {Chunk | null} returns the runtime chunk or null if there is none
*/
getRuntimeChunk() {
if (this._runtimeChunk) return this._runtimeChunk;
for (const parent of this.parentsIterable) {
if (parent instanceof Entrypoint) return parent.getRuntimeChunk();
}
return null;
}
/**
* Sets the chunk with the entrypoint modules for an entrypoint.
* @param {Chunk} chunk the chunk being set as the entrypoint chunk.
* @returns {void}
*/
setEntrypointChunk(chunk) {
this._entrypointChunk = chunk;
}
/**
* Returns the chunk which contains the entrypoint modules
* (or at least the execution of them)
* @returns {Chunk} chunk
*/
getEntrypointChunk() {
return this._entrypointChunk;
}
/**
* @param {Chunk} oldChunk chunk to be replaced
* @param {Chunk} newChunk New chunk that will be replaced with
* @returns {boolean} returns true if the replacement was successful
*/
replaceChunk(oldChunk, newChunk) {
if (this._runtimeChunk === oldChunk) this._runtimeChunk = newChunk;
if (this._entrypointChunk === oldChunk) this._entrypointChunk = newChunk;
return super.replaceChunk(oldChunk, newChunk);
}
}
module.exports = Entrypoint;

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