webpack.config.js

const path = require('path');
const webpack = require('webpack');

module.exports = {
  entry: {
    app: [
      './src/index.js',
    ]
  },
  output: {
    path: path.join(__dirname, 'build'),
    filename: '[name].bundle.js',
  },
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        loader: 'babel-loader',
        options: {
          presets: ['env'],
          plugins: [
            ['transform-react-jsx']
          ]
        }
      },
      {
        test: /\.scss?/i,
        use: [
          {
            loader: 'style-loader'
          },
          {
            loader: 'css-loader',
            options: {
              sourceMap: true,
            }
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: true,
            }
          }
        ],
      }
    ]
  },
  devtool: 'source-map',
  devServer: {
    contentBase: path.join(__dirname, 'src'),
    compress: true,
    historyApiFallback: true
  }
}