webpack.config.js

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

module.exports = {
  mode: 'development',
  entry: './src/index.js',
  resolve: {
    extensions: ['.js']
  },
  devServer: {
    contentBase: [path.join(__dirname, 'dist'), path.join(__dirname, 'assets')],
    hot: true
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          'style-loader',
          'css-loader'
        ]
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: [
          'file-loader'
        ]
      },
      {
        test: /\.(csv|tsv)$/,
        use: [
          'csv-loader'
        ]
      }
    ]
  },
  plugins: [
    new CleanWebpackPlugin(),
    new HtmlWebpackPlugin({
      title: 'Hot',
      filename: 'index.html',
      template: 'template.html'
    }),
    new webpack.HotModuleReplacementPlugin(),
    new CopyPlugin([
      { from: 'assets', to: 'assets' }
    ])
  ],
  output: {
    filename: 'main.js',
    path: path.resolve(__dirname, 'dist'),
    publicPath: '/'
  }
}