webpack.config.js

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

const HtmlWebpackPluginConfig = new HtmlWebpackPlugin({
  template: './src/index.html',
  filename: 'index.html',
  inject: 'body'
});

module.exports = {
  entry: ['babel-polyfill',
    'whatwg-fetch',
    './src/index.js'],
  output: {
    path: path.resolve('dist'),
    filename: 'index_bundle.js'
  },
  module: {
    rules: [
      {
        enforce: 'pre',
        test: /\.jsx?$/,
        use: {
          loader: 'eslint-loader'
        },
        include: /src/
      },
      {
        test: /\.js$/,
        use: {
          loader: 'babel-loader'
        },
        exclude: /node_modules/
      },
      {
        test: /\.jsx$/,
        use: {
          loader: 'babel-loader'
        },
        exclude: /node_modules/
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader'],
        exclude: /node_modules/
      }
    ]
  },
  plugins: [
    HtmlWebpackPluginConfig,
    new webpack.ProvidePlugin({
      fetch: 'imports?this=>global!exports?global.fetch!whatwg-fetch'
    })
  ]
};