webpack.dev.js

const HtmlWebPackPlugin = require('html-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin')
const WorkboxPlugin = require('workbox-webpack-plugin');
const CopyPlugin = require('copy-webpack-plugin');

module.exports = {
    entry: ["babel-polyfill", './src/client/index.js'],
    mode: 'development',
    devtool: 'source-map',
    stats: 'minimal',
    output: {
        libraryTarget: 'var',
        library: 'Client'
    },
    module: {
        rules: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                loader: 'babel-loader',
            },
            {
                test: /\.scss$/,
                exclude: /node_modules/,
                use: ['style-loader', 'css-loader', 'sass-loader']
            },{
				test: /\.(png|jpe?g|gif)$/i,
				loader: 'file-loader',
				options: {
					name: '[path][name].[ext]',
				},
			},
        ]
    },
    plugins: [
        new HtmlWebPackPlugin({
            template: './src/client/views/index.html',
            filename: './index.html'
        }),
        new CleanWebpackPlugin({
            dry: true,
            verbose: true,
            cleanStaleWebpackAssets: true,
            protectWebpackAssets: false
        }),
        new CopyPlugin({
			patterns: [{ from: './src/client/pics', to: './src/client/pics' }],
		}),
        new WorkboxPlugin.GenerateSW()
    ]
}