webpack.dev.js

const merge = require('webpack-merge');
const common = require('./webpack.common.js');

module.exports = merge(common, {
  devtool: 'source-map',
  mode: 'development',

  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        loader: [
          'style-loader',
          {
            loader: 'css-loader',
            options: {
              sourceMap: true,
            },
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: true,
            },
          },
        ],
      },
      {
        test: /\.css$/i,
        loader: [
          'style-loader',
          {
            loader: 'css-loader',
            options: {
              sourceMap: true,
            },
          },
        ],
      },
    ],
  },

  devServer: {
    port: 8080,
    host: '0.0.0.0',
  },
});