RemoveEmptyChunksPlugin.js
9045e4d5dbe1validity_dates

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 */

			class RemoveEmptyChunksPlugin {
			/**
			* Apply the plugin
			* @param {Compiler} compiler the compiler instance
			* @returns {void}
			*/
			apply(compiler) {
			compiler.hooks.compilation.tap("RemoveEmptyChunksPlugin", 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: "RemoveEmptyChunksPlugin",
			stage: STAGE_BASIC
			},
			handler
			);
			compilation.hooks.optimizeChunks.tap(
			{
			name: "RemoveEmptyChunksPlugin",
			stage: STAGE_ADVANCED
			},
			handler
			);
			});
			}
			}
			module.exports = RemoveEmptyChunksPlugin;