webpack.dev.js

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

module.exports = {
  mode: 'development',
  entry: './src/client/index.js',
  output: {
    libraryTarget: 'var',
    library: 'Client',
  },
  devtool: 'source-map',
  devServer: {
    proxy: {
      '/api': 'http://localhost:3000',
    },
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'babel-loader',
      },
      {
        test: /\.scss$/,
        use: ['style-loader', 'css-loader', 'sass-loader'],
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './src/client/views/index.html',
      filename: './index.html',
    }),
    new CleanWebpackPlugin({
      dry: true,
      cleanStaleWebpackAssets: true,
      protectWebpackAssets: false,
    }),
    new webpack.DefinePlugin({
      PRODUCTION: false,
      'process.env.NODE_ENV': JSON.stringify('development'),
    }),
  ],
};