Sample standard dev config for webpack

webpack.config.dev.js

const path = require('path');
const webpack = require('webpack');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const settings = require('./settings');

module.exports = {
  devtool: 'cheap-module-eval-source-map',
  entry: [
    './src/client/index'
  ],
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'bundle.js',
    publicPath: '/static/'
  },
  watchOptions: {
      poll: 1000
  },
  plugins: [
    new UglifyJsPlugin({
      sourceMap: true
    }),
    new webpack.LoaderOptionsPlugin({
      debug: true
    }),
    /**
     * NoErrorsPlugin prevents your webpack CLI from exiting with an error code if
     * there are errors during compiling - essentially, assets that include errors
     * will not be emitted. If you want your webpack to 'fail', you need to check out
     * the bail option.
     */
    new webpack.NoEmitOnErrorsPlugin(),
    /**
     * DefinePlugin allows us to define free variables, in any webpack build, you can
     * use it to create separate builds with debug logging or adding global constants!
     * Here, we use it to specify a development build.
     */

    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('development'),
      'process.env.BUILD_ENV': JSON.stringify(process.env.BUILD_ENV),
      '__API_HOST__': JSON.stringify(settings.api.host),
      '__HUB_HOST__': JSON.stringify(settings.hub.host)
    })
  ],
  module: {
    rules: [
      {
        test: /\.js?/,
        include: [
          path.join(__dirname, '../../client'),
          path.join(__dirname, 'config')
        ],
        exclude: [
          /node_modules/, /styles/
        ],
        use: [
          {
            loader: 'babel-loader'
          }
        ]
      },
      {
        test: /\.(jpe?g|png|gif|svg|mov)$/i,
        loader: 'file-loader?name=[name].[ext]'
      },
      {
        test: /\.(scss|css)$/,
        use: [
          'style-loader',
          'css-loader',
          'sass-loader'
        ]
      }
    ]
  }
};