webpack.config.dev.js

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

module.exports = {
  mode: "development",
  context: __dirname,
  entry: ["./src/index.jsx"],
  output: {
    path: path.resolve(__dirname, 'public/'),
    filename: "bundle.js",
    publicPath: '/public/'
  },
  devServer: {
    publicPath: '/',
    historyApiFallback: true
  },
  module: {
    rules: [{
        test: /\.js|.jsx?$/,
        exclude: /(node_modules)/,
        loaders: ['babel-loader?presets[]=react,presets[]=es2015,presets[]=stage-0']
      },
      {
        test: /\.scss$/,
        loader: 'style-loader!css-loader!sass-loader?sourceMap'
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader']
      },
      {
        test: /\.(png|jpg|gif)$/,
        use: [{
          loader: 'url-loader',
          options: {
            limit: 8192
          }
        }]
      }
    ]
  },
  resolve: {
    extensions: ['.js', '.jsx'],
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin()
  ],
  devServer: {
    historyApiFallback: true,
    contentBase: './'
  }
};