1 files changed, 75 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/runtime/StartupChunkDependenciesRuntimeModule.js b/node_modules/webpack/lib/runtime/StartupChunkDependenciesRuntimeModule.js
new file mode 100644
index 00000000..da2ec754
--- /dev/null
+++ b/node_modules/webpack/lib/runtime/StartupChunkDependenciesRuntimeModule.js
@@ -0,0 +1,75 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const RuntimeGlobals = require("../RuntimeGlobals");
+const RuntimeModule = require("../RuntimeModule");
+const Template = require("../Template");
+
+/** @typedef {import("../Chunk")} Chunk */
+/** @typedef {import("../ChunkGraph")} ChunkGraph */
+/** @typedef {import("../Compilation")} Compilation */
+
+class StartupChunkDependenciesRuntimeModule extends RuntimeModule {
+	/**
+	 * @param {boolean} asyncChunkLoading use async chunk loading
+	 */
+	constructor(asyncChunkLoading) {
+		super("startup chunk dependencies", RuntimeModule.STAGE_TRIGGER);
+		this.asyncChunkLoading = asyncChunkLoading;
+	}
+
+	/**
+	 * @returns {string | null} runtime code
+	 */
+	generate() {
+		const chunkGraph = /** @type {ChunkGraph} */ (this.chunkGraph);
+		const chunk = /** @type {Chunk} */ (this.chunk);
+		const chunkIds = Array.from(
+			chunkGraph.getChunkEntryDependentChunksIterable(chunk)
+		).map(chunk => chunk.id);
+		const compilation = /** @type {Compilation} */ (this.compilation);
+		const { runtimeTemplate } = compilation;
+		return Template.asString([
+			`var next = ${RuntimeGlobals.startup};`,
+			`${RuntimeGlobals.startup} = ${runtimeTemplate.basicFunction(
+				"",
+				!this.asyncChunkLoading
+					? chunkIds
+							.map(
+								id => `${RuntimeGlobals.ensureChunk}(${JSON.stringify(id)});`
+							)
+							.concat("return next();")
+					: chunkIds.length === 1
+						? `return ${RuntimeGlobals.ensureChunk}(${JSON.stringify(
+								chunkIds[0]
+							)}).then(next);`
+						: chunkIds.length > 2
+							? [
+									// using map is shorter for 3 or more chunks
+									`return Promise.all(${JSON.stringify(chunkIds)}.map(${
+										RuntimeGlobals.ensureChunk
+									}, ${RuntimeGlobals.require})).then(next);`
+								]
+							: [
+									// calling ensureChunk directly is shorter for 0 - 2 chunks
+									"return Promise.all([",
+									Template.indent(
+										chunkIds
+											.map(
+												id =>
+													`${RuntimeGlobals.ensureChunk}(${JSON.stringify(id)})`
+											)
+											.join(",\n")
+									),
+									"]).then(next);"
+								]
+			)};`
+		]);
+	}
+}
+
+module.exports = StartupChunkDependenciesRuntimeModule;