Webpack config boilerplate

webpack.config.js

const path = require('path');
const webpack = require('webpack');
const devMode = process.env.NODE_ENV !== 'production';
const publishFolder = 'publish'; // dir were bundle will be allowed.

module.exports = {
  mode: 'development',
  devtool: 'cheap-eval-source-map',
  entry: [
    //add your entry files or file
  ],
  output: {
    path: path.join(__dirname, publishFolder),
    filename: '' //bundle file name e.g. 'bundle.js'
  },
  resolve: {
    alias: {
      component: path.join(__dirname, 'src')
    }
  },  
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
            loader: 'babel-loader',
            options: {
              presets: ['@babel/preset-env'],
              plugins: [require('@babel/plugin-proposal-object-rest-spread')]
            }
          }
      }
    ]
  },
  plugins: [
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV)
    })
  ],
  devServer: {
    contentBase: `${publishFolder}/`,
    compress: true
  },
  watchOptions: {
    ignored: [
      /node_modules/,
      '.src/**/*.test.js' 
    ]
  }
}