webpack.common.js

/* eslint-disable import/no-extraneous-dependencies */
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
/* eslint-enable */

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: 'bundle.css',
      chunkFilename: '[id].css',
    }),
  ],
  entry: ['./src/assets/javascripts/webpack-entry.js'],
  output: {
    path: `${__dirname}/assets/dist`,
    // publicPath: '/assets',
    filename: 'bundle.js',
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: ['babel-loader'],
      },
      {
        test: /\.scss$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              // you can specify a publicPath here
              // by default it use publicPath in webpackOptions.output
              publicPath: '../',
            },
          },
          'css-loader',
          'sass-loader',
        ],
      },
    ],
  },
  resolve: {
    extensions: ['.js', '.jsx'],
  },
};