Webpack config ref. to use MiniCssExtractPlugin

webpack.config.js

const path = require("path");
const webpack = require("webpack");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const CompressionPlugin = require("compression-webpack-plugin");
const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
const OptimizeCSSAssetsPlugin = require("optimize-css-assets-webpack-plugin");

module.exports = {
    entry: {
        admin: "./React/js/App/Modules/Admin/admin.js",
        client: "./React/js/App/Modules/Client/client.js",
        login: "./React/js/EntryPoint/Modules/Admin/Account/Login/Login.js",
        password: "./React/js/EntryPoint/Modules/Admin/Account/Password/Password.js",
        manageaccount: "./React/js/EntryPoint/Modules/Admin/Account/Index.js",
        categories: "./React/js/EntryPoint/Modules/Admin/Categories/Categories.js",
        tag: "./React/js/EntryPoint/Modules/Admin/Tag/Tag.js",
        post: "./React/js/EntryPoint/Modules/Admin/Post/Post.js",
        comment: "./React/js/EntryPoint/Modules/Admin/Comment/Comment.js",
        portal: "./React/js/EntryPoint/Modules/Admin/Portal/PortalIndex.js"
    },
    output: {
        path: path.resolve(__dirname, "wwwroot/dist"),
        filename: "[name].js",
        publicPath: "/dist/"
    },
    optimization: {
        minimizer: [
            new UglifyJsPlugin({
                parallel: true,
                sourceMap: true
            }),
            new OptimizeCSSAssetsPlugin({})
        ]
    },
    plugins: [
        new webpack.ContextReplacementPlugin(/\.\/locale$/, 'empty-module', false, /jsx$/),
        new webpack.LoaderOptionsPlugin({
            options: {}
        }),
        new MiniCssExtractPlugin({
            filename: "[name].css",
            chunkFilename: "[id].css"
        }),
        new webpack.ProvidePlugin({
            $: "jquery",
            jQuery: "jquery",
            Popper: ['popper.js', 'default']
        }),
        new UglifyJsPlugin(),
        new CompressionPlugin({
            test: /\.(js|css)/
        })
    ],
    resolve: {
        modules: [
            path.resolve('./React/js/App'),
            path.resolve('./node_modules')
        ]
    },
    module: {
        rules: [{
                test: /\.scss$/,
                use: [
                    MiniCssExtractPlugin.loader,
                    {
                        loader: "css-loader",
                        options: {
                            minimize: true,
                            sourceMap: true
                        }
                    },
                    {
                        loader: "sass-loader"
                    }
                ]
            },
            {
                test: /\.css$/,
                use: [MiniCssExtractPlugin.loader, "css-loader"]
            },
            {
                test: /\.(js|jsx)$/,
                exclude: /node_modules/,
                loader: ["babel-loader", "eslint-loader"]
            },
            {
                test: /\.(jpe?g|png|gif)$/i,
                loader: "file-loader"
            },
            {
                test: /\.(woff|ttf|otf|eot|woff2|svg)$/i,
                loader: "file-loader"
            }
        ]
    },
    watch: true
};