原生JS实现列表子元素顺序反转的方法分析

var ul = document.getElementById('target');
var list = ul.getElementByTagName('li');
var length = list.length;
while(length--){
  ul.appendchild(ul.childNodes[length]);
}

var ul = document.getElementById('target');
var list = ul.getElementByTagName('li');
var fragment = document.createDocumentFragment();
for(var i = list.length; i >= 0; i--){
  fragment.appendChild(list[i]);
}
ul.appendChile(fragment);

var ul = document.getElementById('target');
var chil_arr = Array.prototype.slice.call(ul.getElementByTagName('li'), 0);//因为getElementByTagName获取到的是伪数组，所以要进行转换
var str = '';
chil_arr.reverse();
for(var i = 0; i < chil_arr.length; i++){
  str += chil_arr[i].outerHTML;
}
ul.innerHTML(str);

var ul = document.getElementById('target');
var list = ul.getElementByTageName('li');
var str = "";
for(var i = list.length; i >= 0; i--){
  str += "<li>" + list[i].innerHTML + "</li>";
}
ul.innerHTML(str);