webpack.common.js

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

module.exports = {
  entry: {
    app: './src/js/index.js'
  },
  plugins: [
    new CleanWebpackPlugin(),
    new HtmlWebpackPlugin({
      title: "custom template",
      template: './src/index.html',
      filename: 'index.html'
    })
  ],
  output: {
    filename: '[name].bundle.js',
    path: path.resolve(__dirname, 'dist')
  },
  module: {
    rules: [{
      test: /\.css/,
      use: [
        'style-loader',
        'css-loader'
      ]
    },
    {
      test: /\.m?js$/,
      exclude: /(node_modules|bower_components)/,
      use: {
        loader: 'babel-loader',
        options: {
          presets: ['@babel/preset-env']
        }
      }
    },
    {
      test: /\.(png|svg|jpg|gif)$/,
      use: [
        'file-loader'
      ]
    }
    ]
  }
};