js - 使用jquery 动态创建css class

  https://stackoverflow.com/questions/1720320/how-to-dynamically-create-css-class-in-javascript-and-apply

  var style = document.createElement('style');
  style.type = 'text/css';
  style.innerHTML = '.offline-ui { display: none !important; }';
  document.getElementsByTagName('body')[0].appendChild(style);