text: 
  import { nodeResolve } from '@rollup/plugin-node-resolve';
  
  export default {
      input: 'src/functions.js',
      output: {
        dir: 'output',
        format: 'umd'
      },
      plugins: [nodeResolve({
          mainFields: ['module', 'main', 'browser']
      })]
    };