VIP20/19_Node.js/day-1/code/webpack-demo/config/webpack.config.dev.js

const base = require('./webpack.config.base');
const { merge } = require('webpack-merge');

module.exports = merge(base, {
  mode: 'development',
  devtool: 'eval-cheap-module-source-map',
  devServer: {
    historyApiFallback: true,
    port: 4000,
    hot: true,
    open: true,
  },
});