text: import visualizer from 'rollup-plugin-visualizer';
  import createDefaultConfig from '../../modern-and-legacy-config';
  
  const configs = createDefaultConfig({
    input: './demo/js/index.html',
  });
  const config = configs[0];
  
  export default {
    ...config,
    plugins: [
      ...config.plugins,
      visualizer({
        sourcemap: true,
      }),
    ],
  };
  