有结构:
<ul id="demo"> <li>a</li> <li>b</li> <li>c</li> </ul>
如果运行代码1:
var ul = document.getElementById('demo'); var liList = ul.getElementsByTagName('li'); for (var i = 0; i < = liList.length; i++) { ul.removeChild(liList[i]); }
如果和我一样被欺骗了,那么看看正确的代码就明白原因啦!
var ul = document.getElementById('demo'); var liList = ul.getElementsByTagName('li'); var lilength = liList.length; for (var i = 0; i < lilength; i++) { ul.removeChild(liList[0]); }




