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Navigation drop-down menu effect implemented by jQuery

高洛峰
高洛峰Original
2016-12-15 16:04:421461browse

The effect is as shown in the picture:

Navigation drop-down menu effect implemented by jQuery

html code:

<div id="navigation">
 <ul>
   <li><a href="#">首 页</a></li>
   <li><a href="#">衬 衫</a>
    <ul>
      <li><a href="#">短袖衬衫</a></li>
      <li><a href="#">长袖衬衫</a></li>
      <li><a href="#">无袖衬衫</a></li>
    </ul>
  </li>
  <li><a href="#">卫 衣</a>
    <ul>
      <li><a href="#">开襟卫衣</a></li>
      <li><a href="#">套头卫衣</a></li>
    </ul>
   </li>
  <li><a href="#">裤 子</a>
    <ul>
      <li><a href="#">休闲裤</a></li>
      <li><a href="#">卡其裤</a></li>
      <li><a href="#">牛仔裤</a></li>
      <li><a href="#">短裤</a></li>
    </ul>
   </li>
   <li><a href="#">联系我们</a></li>
 </ul>
</div>

jQuery code:

//导航效果(兼容IE6)
/*
1.使用$("#navigation ul li:has(ul)")函数来选择含有<ul>元素的<li>元素,然后为它们添加hover事件,
2.在hover事件的第一个函数内,使用$(this).children("ul")找到<li>元素内部的<ul>元素,然后用stop(true,true)语句使导航向下扩展
3.在hover事件的第二个函数内,用stop(true,true).slideUp("fast")语句使导航向上隐藏
4.在两个动画效果之前都添加了stop(true,true)方法,这样做的好处是能把为执行完的动画队列清空,并且将正在执行的动画跳转到末状态
*/
$(function(){
  $("#navigation ul li:has(ul)").hover(function(){
   $(this).children("ul").stop(true,true).slideDown(400);
  },function(){
   $(this).children("ul").stop(true,true).slideUp("fast");
  });
})


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