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app_vue/node_modules/webpack/lib/optimize/RemoveEmptyChunksPlugin.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const { STAGE_BASIC, STAGE_ADVANCED } = require("../OptimizationStages");
+
+/** @typedef {import("../Chunk")} Chunk */
+/** @typedef {import("../Compiler")} Compiler */
+
+const PLUGIN_NAME = "RemoveEmptyChunksPlugin";
+
+class RemoveEmptyChunksPlugin {
+	/**
+	 * Apply the plugin
+	 * @param {Compiler} compiler the compiler instance
+	 * @returns {void}
+	 */
+	apply(compiler) {
+		compiler.hooks.compilation.tap(PLUGIN_NAME, compilation => {
+			/**
+			 * @param {Iterable<Chunk>} chunks the chunks array
+			 * @returns {void}
+			 */
+			const handler = chunks => {
+				const chunkGraph = compilation.chunkGraph;
+				for (const chunk of chunks) {
+					if (
+						chunkGraph.getNumberOfChunkModules(chunk) === 0 &&
+						!chunk.hasRuntime() &&
+						chunkGraph.getNumberOfEntryModules(chunk) === 0
+					) {
+						compilation.chunkGraph.disconnectChunk(chunk);
+						compilation.chunks.delete(chunk);
+					}
+				}
+			};
+
+			// TODO do it once
+			compilation.hooks.optimizeChunks.tap(
+				{
+					name: PLUGIN_NAME,
+					stage: STAGE_BASIC
+				},
+				handler
+			);
+			compilation.hooks.optimizeChunks.tap(
+				{
+					name: PLUGIN_NAME,
+					stage: STAGE_ADVANCED
+				},
+				handler
+			);
+		});
+	}
+}
+module.exports = RemoveEmptyChunksPlugin;