text: import { init, end } from './pullDownRefresh';
  
  let opt = {
      callback: function() {
          setTimeout(function() {
              var p = document.createElement('p');
              p.innerHTML = 'aaaaaaaaaaaaaaaa';
              document.body.appendChild(p);
  
              end();
  
          }, 2000);
      }
  }
  
  init(opt);
  
  
  