source: frontend/node_modules/webpack/lib/WarnNoModeSetPlugin.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra
*/

"use strict";

const WebpackError = require("./errors/WebpackError");

class NoModeWarning extends WebpackError {
        constructor() {
                super();

                /** @type {string} */
                this.name = "NoModeWarning";
                this.message =
                        "configuration\n" +
                        "The 'mode' option has not been set, webpack will fallback to 'production' for this value.\n" +
                        "Set 'mode' option to 'development' or 'production' to enable defaults for each environment.\n" +
                        "You can also set it to 'none' to disable any default behavior. " +
                        "Learn more: https://webpack.js.org/configuration/mode/";
        }
}

/** @typedef {import("./Compiler")} Compiler */

const PLUGIN_NAME = "WarnNoModeSetPlugin";

class WarnNoModeSetPlugin {
        /**
         * Applies the plugin by registering its hooks on the compiler.
         * @param {Compiler} compiler the compiler instance
         * @returns {void}
         */
        apply(compiler) {
                compiler.hooks.thisCompilation.tap(PLUGIN_NAME, (compilation) => {
                        compilation.warnings.push(new NoModeWarning());
                });
        }
}

module.exports = WarnNoModeSetPlugin;