webpack.dev.js

const path = require('path');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const HtmlWebPackPlugin = require('html-webpack-plugin');

module.exports = {
    mode: 'development',
    devtool: 'source-map',
    devServer: {
        port: 8000
    },
    entry: './src/client/index.js',
    output:{
        libraryTarget: 'var',
        library:'Client'
    },
    module: {
        rules: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                use: {
                    loader: "babel-loader"
                }
            },
            {
                test: /\.scss$/,
                use: [ 'style-loader', 'css-loader', 'sass-loader' ]
            }
        ]
    },
    plugins: [
        new HtmlWebPackPlugin({
            template: "./src/client/views/index.html",
            filename: "./index.html",
        }),
        new CleanWebpackPlugin({
            // Simulate the removal of files
            dry: true,
            // Write Logs to Console
            verbose: true,
            // Automatically remove all unused webpack assets on rebuild
            cleanStaleWebpackAssets: true,
            protectWebpackAssets: false
        })
    ]    
}