webpack.config.js

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

const env = process.env.NODE_ENV;

module.exports = {
  entry: {
    app: './src/index.js',
  },
  mode: env || 'development',
  output: {
    filename: 'scripts/app.js',
    path: path.resolve(__dirname, 'dist'),
    publicPath: '/',
  },
  devtool: 'inline-source-map',
  devServer: {
    contentBase: './dist',
    historyApiFallback: true,
  },
  module: {
    rules: [{
      test: /(\.js|\.jsx)$/,
      exclude: /node_modules/,
      use: ['babel-loader'],
    },
    {
      test: /(\.css|\.scss|\.sass)$/,
      use: [{
        loader: 'style-loader',
      }, {
        loader: 'css-loader',
      }, {
        loader: 'sass-loader',
      }],
    },
    {
      test: /\.svg$/,
      use: 'file-loader',
    },
    ],
  },
  plugins: [
    new CleanWebpackPlugin(['dist']),
    new HtmlWebpackPlugin({
      template: 'index.html',
    }),
  ],
};