webpack/lib/errors/UnusedDefinesWarning.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 WebpackError = require("./WebpackError");

class UnusedDefinesWarning extends WebpackError {
	/**
	 * Creates an instance of UnusedDefinesWarning.
	 * @param {string[]} keys the define keys nothing referenced
	 */
	constructor(keys) {
		super(
			`webpack define recommendations: \nThe following ${
				keys.length === 1 ? "key was" : "keys were"
			} defined but never referenced by any module: ${keys.join(
				", "
			)}.\nA key that substitutes nothing is usually a typo, or a leftover from code that no longer reads it. Every key still costs a parser hook on each module, and changing its value invalidates the build for nothing.\nFor more info visit https://webpack.js.org/plugins/define-plugin/`
		);

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

module.exports = UnusedDefinesWarning;