webpack.config.js

const webpack = require('webpack')
const path = require('path')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const { CleanWebpackPlugin } = require('clean-webpack-plugin')
const CopyPlugin = require('copy-webpack-plugin')

const config = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name].[contenthash].js'
  },
  devServer: {
    contentBase: './dist'
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          'style-loader',
          {
            loader: 'css-loader',
            options: {
              importLoaders: 1
            }
          },
          'postcss-loader'
        ]
      },
      {
        test: /\.(png|jpe?g|gif|svg)$/i,
        use: [
          {
            loader: 'file-loader'
          }
        ]
      },
      {
        test: /\.html$/,
        use: 'html-loader',
        exclude: path.resolve('src/index.html')
      }
    ]
  },
  plugins: [
    new CleanWebpackPlugin(),
    new CopyPlugin([{ from: 'public', to: '' }]),
    new HtmlWebpackPlugin({
      template: 'src/index.html'
    })
  ],
  optimization: {
    runtimeChunk: 'single',
    splitChunks: {
      cacheGroups: {
        vendor: {
          test: /[\\\/]node_modules[\\\/]/,
          name: 'vendors',
          chunks: 'all'
        }
      }
    }
  }
}

module.exports = config