webpack.config.js

const HtmlWebPackPlugin = require('html-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const path = require('path');
const webpack = require('webpack');

module.exports = {
  entry: ['babel-polyfill', './src/index.js'],
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
        },
      },
      {
        test: /\.html$/,
        use: [
          {
            loader: 'html-loader',
          },
        ],
      },
      {
        test: /\.css$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
        ],
      },
    ],
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: './src/index.html',
      filename: './index.html',
    }),
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: '[name].[hash].css',
      chunkFilename: '[id].[hash].css',
    }),
    new CleanWebpackPlugin(['dist'], {
      root: path.join(__dirname),
    }),
    new webpack.ProvidePlugin({
      $: 'jquery',
      'window.$': 'jquery',
      'window.jQuery': 'jquery',
      jQuery: 'jquery',
    }),
  ],
};