webpack.config.js

const path = require('path');

module.exports = {
  mode: 'development',
  entry: ['./src/js/index.js', './src/scss/app.scss'],
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'public/dist')
  },
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: '[name].css',
            }
          },
          {
            loader: 'extract-loader'
          },
          {
            loader: 'css-loader?-url'
          },
          {
            loader: 'postcss-loader', // Run post css actions
            options: {
              plugins: function () { // post css plugins, can be exported to postcss.config.js
                return [
                  require('precss'),
                  require('autoprefixer')
                ];
              }
            }
          },
          {
            loader: 'sass-loader'
          }
        ],
      },
    ]
  }
};