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node_modules/webpack/lib/Entrypoint.js

@@ -4,39 +4,60 @@
 */
 "use strict";
 
-class Entrypoint {
+const ChunkGroup = require("./ChunkGroup");
+
+/** @typedef {import("./Chunk")} Chunk */
+
+/**
+ * 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 {string} name the name of the entrypoint
+	 */
 	constructor(name) {
-		this.name = name;
-		this.chunks = [];
+		super(name);
+		/** @type {Chunk=} */
+		this.runtimeChunk = undefined;
 	}
 
-	unshiftChunk(chunk) {
-		this.chunks.unshift(chunk);
-		chunk.entrypoints.push(this);
+	/**
+	 * isInitial will always return true for Entrypoint ChunkGroup.
+	 * @returns {true} returns true as all entrypoints are initial ChunkGroups
+	 */
+	isInitial() {
+		return true;
 	}
 
-	insertChunk(chunk, before) {
-		const idx = this.chunks.indexOf(before);
-		if(idx >= 0) {
-			this.chunks.splice(idx, 0, chunk);
-		} else {
-			throw new Error("before chunk not found");
-		}
-		chunk.entrypoints.push(this);
+	/**
+	 * Sets the runtimeChunk for an entrypoint.
+	 * @param {Chunk} chunk the chunk being set as the runtime chunk.
+	 * @returns {void}
+	 */
+	setRuntimeChunk(chunk) {
+		this.runtimeChunk = chunk;
 	}
 
-	getFiles() {
-		const files = [];
+	/**
+	 * Fetches the chunk reference containing the webpack bootstrap code
+	 * @returns {Chunk} returns the runtime chunk or first chunk in `this.chunks`
+	 */
+	getRuntimeChunk() {
+		return this.runtimeChunk || this.chunks[0];
+	}
 
-		for(let chunkIdx = 0; chunkIdx < this.chunks.length; chunkIdx++) {
-			for(let fileIdx = 0; fileIdx < this.chunks[chunkIdx].files.length; fileIdx++) {
-				if(files.indexOf(this.chunks[chunkIdx].files[fileIdx]) === -1) {
-					files.push(this.chunks[chunkIdx].files[fileIdx]);
-				}
-			}
-		}
-
-		return files;
+	/**
+	 * @param {Chunk} oldChunk chunk to be replaced
+	 * @param {Chunk} newChunk New chunkt that will be replaced
+	 * @returns {boolean} rerturns true for
+	 */
+	replaceChunk(oldChunk, newChunk) {
+		if (this.runtimeChunk === oldChunk) this.runtimeChunk = newChunk;
+		return super.replaceChunk(oldChunk, newChunk);
 	}
 }