webpack.config.js

const path = require('path');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const DEV = process.env.NODE_ENV === 'develop';

module.exports = [
  {
    entry: './src/js/app.js',
    output: {
      path: path.join(__dirname, 'public'),
      filename: 'bundle.js'
    },
    module: {
      rules: [{
        test: /\.js$/,
        exclude: /node_modules/,
        use: [{
          loader: 'babel-loader'
        }],
      }, {
        enforce: 'pre',
        test: /\.js$/,
        exclude: /node_modules/,
        use: [{
          loader: 'eslint-loader',
          options: {
            fix: true,
            failOnError: false
          }
        }],
      }],
    },
    devServer: {
      contentBase: path.join(__dirname, "public"),
    },
    devtool : DEV ? 'cheap-module-eval-source-map' : false
  },
  {
    entry: './src/sass/style.scss',
    output: {
      path: path.join(__dirname, 'public'),
      filename: 'style.css'
    },
    module: {
      rules: [{
        test: /\.scss$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: ['css-loader', 'sass-loader']
        })
      }]
    },
    plugins: [ new ExtractTextPlugin('style.css') ],
    devtool : DEV ? 'cheap-module-eval-source-map' : false
  }
];