webpack.config.js

const path = require('path');
const ExtractTextPlugin = require('extract-text-webpack-plugin');

module.exports = {
  entry: './src/js/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js',
  },
  module: {
    rules: [
      {
        test: /\.scss$/,
        // loaders: [ 'style-loader', 'css-loader', 'resolve-url-loader','sass-loader?sourceMap' ],
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: ['css-loader', 'sass-loader']
        })
      },
      {
        test: /\.css$/,
        use: [ 'style-loader', 'css-loader' ]
      },
      {
        test: /\.(png|jpg|gif|jpeg)$/,
        use: [
          {
            loader: 'file-loader',
            options: {}
          }
        ]
      },
      {
        test: /\.js$/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['env']
          }
        }
      },
      {
            test: /\.(woff(2)?|ttf|eot|svg)(\?v=\d+\.\d+\.\d+)?$/,
            use: [{
                loader: 'file-loader',
                options: {
                    name: '[name].[ext]',
                    outputPath: './fonts/'
                }
            }]
        }
    ]
  },
  plugins: [
    new ExtractTextPlugin({
      filename:"index.css",
      disable: process.env.NODE_ENV === 'development'
    })
  ]
}