webpack/lib/errors/EntrypointOverlapWarning.js

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Alexander Akait @alexander-akait
*/

"use strict";

const formatSize = require("../util/formatSize");
const WebpackError = require("./WebpackError");

/**
 * @typedef {object} EntrypointOverlapDetails
 * @property {string} name
 * @property {string[]} entrypoints the entrypoints that each ship a copy
 * @property {number} wasted bytes the copies past the first cost
 */

class EntrypointOverlapWarning extends WebpackError {
	/**
	 * Creates an instance of EntrypointOverlapWarning.
	 * @param {EntrypointOverlapDetails[]} modules the worst offenders, largest waste first
	 * @param {number} wasted bytes all overlapping copies cost together
	 */
	constructor(modules, wasted) {
		const list = modules
			.map(
				(module) =>
					`\n  ${module.name} (in ${module.entrypoints.join(", ")}, ${formatSize(
						module.wasted
					)} extra)`
			)
			.join("");

		super(
			`entrypoint overlap: modules shipped by more than one entrypoint add ${formatSize(
				wasted
			)}:${list}\nEach entrypoint downloads its own copy. 'optimization.splitChunks' with 'chunks: "all"' can move them into a chunk every entrypoint shares.\nFor more info visit https://webpack.js.org/plugins/split-chunks-plugin/`
		);

		/** @type {string} */
		this.name = "EntrypointOverlapWarning";
	}
}

module.exports = EntrypointOverlapWarning;