webpack.config.js

const path = require('path');
const webpack = require('webpack');
const BrowserSyncPlugin = require('browser-sync-webpack-plugin');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');

module.exports = {
    entry: {
        main: './src/features/main/index.js',
        admin: './src/features/admin/index.js'
    },
    output: {
        filename: '[name].entry.js',
        path: path.resolve(__dirname, 'public/dist')
    },
    module: {
        rules: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                loader: "eslint-loader"
            },
            {
                test: /\.css$/,
                exclude: /node_modules/,
                use: [
                    {
                        loader: MiniCssExtractPlugin.loader
                    },
                    'css-loader',
                    'postcss-loader'
                ]
            }
        ]
    },
    plugins: [
        new MiniCssExtractPlugin({
            filename: "[name].css"
        }),
        new CleanWebpackPlugin(),
        new OptimizeCssAssetsPlugin({
            assetNameRegExp: /\.css$/g,
            cssProcessor: require('cssnano'),
            cssProcessorPluginOptions: {
                preset: ['default', { discardComments: { removeAll: true } }]
            },
            canPrint: true
        }),
        new webpack.ProvidePlugin({
            $: 'jquery',
            jQuery: 'jquery',
            'window.jQuery': 'jquery'
        }),
        new BrowserSyncPlugin({
            proxy: 'localhost:8000',
            host: 'localhost',
            port: 3000,
            files: ['./src/*'],
            injectChanges: true
        })
    ]
};