webpack.config.js

const path = require("path");
const webpack = require("webpack");

module.exports = {
  output: {
    path: path.resolve(__dirname, "build"),
    filename: "bundle.js",
    publicPath: "/"
  },
  resolve: {
    modules: [__dirname, "node_modules"],
    extensions: ["*", ".js", ".jsx"]
  },
  devtool: "source-map",
  module: {
    rules: [
      {
        test: /\.(s*)css$/,
        use: [
          {
            loader: 'style-loader'
          },
          {
            loader: 'css-loader',
            options: {
              importLoaders: 2
            }
          },
        ]
      },
      {
        test: /\.(js|jsx)$/,
        exclude: /nodeModules/,
        use: {
          loader: 'babel-loader'
        }
      },
      {
        loader: require.resolve('babel-loader', { paths: ['./node_modules/@uxpin/merge-cli'] }),
        test: /\.js?$/,
        exclude: /node_modules/,
        options: {
          presets: [
            require.resolve('@babel/preset-env', { paths: ['./node_modules/@uxpin/merge-cli'] }),
            require.resolve('@babel/preset-react', { paths: ['./node_modules/@uxpin/merge-cli'] })
          ],
        }
      },
    ]
  }
}