{
  entry: options.entry,
  output: Object.assign({ // Compile into js/build.js
    path: path.resolve(process.cwd(), 'build'),
    publicPath: '/',
  }, options.output), // Merge with env dependent settings
  module: {
    rules: [{
      test: /\.js$/, // Transform all .js files required somewhere with Babel
      exclude: /node_modules/,
      use: {
        loader: 'babel-loader',
        options: options.babelQuery,
      },
    }, {
      // Do not transform vendor's CSS with CSS-modules
      // The point is that they remain in global scope.
      // Since we require these CSS files in our JS or CSS files,
      // they will be a part of our compilation either way.
      // So, no need for ExtractTextPlugin here.
      test: /\.css$/,
      include: /node_modules/,
      use: ['style-loader', 'css-loader'],
    }, {
      test: /\.(eot|ttf|woff|woff2|swf)$/,
      use: 'file-loader',
    }, {
      test: /\.(svg|jpg|png|gif)$/,
      loader: 'url-loader',
      options: {
        limit: 1024,
      },
    }, {
      test: /\.(svg|jpg|png|gif)$/,
      enforce: 'pre',
      loader: 'image-webpack-loader',
      exclude: [],
      options: {
        gifsicle: {
          interlaced: false,
        },
        optipng: {
          optimizationLevel: 7,
        },
        pngquant: {
          quality: '90-100',
          speed: 4,
        },
        mozjpeg: {
          progressive: true,
          quality: 65,
        },
      },
    }, {
      test: /\.html$/,
      use: 'html-loader',
    }, {
      test: /\.json$/,
      use: 'json-loader',
    }, {
      test: /\.(mp4|webm)$/,
      loader: 'url-loader',
      options: {
        limit: 10000,
      },
    }],
  },
  plugins: options.plugins.concat([
    new webpack.ProvidePlugin({
      // make fetch available
      fetch: 'exports-loader?self.fetch!whatwg-fetch',
    }),

    // Always expose NODE_ENV to webpack, in order to use `process.env.NODE_ENV`
    // inside your code for any environment checks; UglifyJS will automatically
    // drop any unreachable code.
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: process.env.NODE_ENV === 'production' || process.env.NODE_ENV === 'stage'
          ? JSON.stringify('production')
          : JSON.stringify(process.env.NODE_ENV),
        // React only optimize code with env set to `production`,
        // since we want stage environment have the same behavior, we explicitly add a new variable here.
        REAL_NODE_ENV: JSON.stringify(process.env.NODE_ENV),
      },
    }),

    new webpack.NamedModulesPlugin(),
  ]),
  resolve: {
    mainFields: [
      'browser',
      'jsnext:main',
      'main',
    ],
  },
  devtool: options.devtool,
  target: 'web', // Make web variables accessible to webpack, e.g. window
  performance: options.performance || {},
}