JS实现滑动导航效果

时间:2021-04-02 人气:0
<!doctype html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <meta name="viewport"
   content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
 <meta http-equiv="X-UA-Compatible" content="ie=edge">
 <title>Document</title>
 <style>
  * {
   padding: 0;
   margin: 0;
  }
  ul {
   list-style-type: none;
   height: 42px;
   position: absolute;
  }
  img {
   vertical-align: middle;
  }
  li,
  a {
   cursor: pointer;
  }
  a {
   text-decoration: none;
   color: #000000;
   display: block;
  }
  li {
   width: 83px;
   height: 42px;
   /*background-color: pink;*/
   float: left;
   text-align: center;
   line-height: 42px;
  }
  .box {
   position: relative;
   width: 530px;
   height: 42px;
   border: 1px solid deepskyblue;
   margin: 100px auto;
   -webkit-border-radius: 10px;
   -moz-border-radius: 10px;
   border-radius: 10px;
  }
  .box img#cloud {
   width: 83px;
   height: 42px;
   position: absolute;
   left: 0;
   top: 0;
  }
  .box img#xinhao {
   position: absolute;
   right: 0;
   top: 50%;
   transform: translateY(-50%);
  }
 </style>
</head>
<body>
<div class="box" id="box">
 <img id="cloud" src="images/cloud.gif" alt="" />
 <ul id="ull">
  <li><a href="#">长沙校区</a></li>
  <li><a href="#">长沙校区</a></li>
  <li><a href="#">长沙校区</a></li>
  <li><a href="#">长沙校区</a></li>
  <li><a href="#">长沙校区</a></li>
  <li><a href="#">长沙校区</a></li>
 </ul>
 <img id="xinhao" src="images/rss.png" alt="" />
</div>
<script src="js/common.js"></script>
<script src="js/changespead.js"></script>
<script>
 //获取每一个li
 var list=my$('ull').children;
 console.log(list);
 //获取到筋斗云图片
 var im=my$('cloud');
 //获取图片的宽度
 var imgWidth=im.offsetWidth;
 console.log(imgWidth);
 for(var i=0;i<list.length;i++){
  //设置index值用来储存移动的距离
  list[i].setAttribute('index',i);
  //遍历所有li，每个li绑定三个时间指向同一个函数f1
  list[i].onmouseover=f1;
  list[i].onmouseout=f1;
  list[i].onclick=f1;
  //实现函数f1
  function f1(e){
   switch(e.type) {
    case 'mouseover':
     //获取当前li的index值
     index=this.getAttribute('index');
     //调用变速移动函数
     movecs(im,imgWidth*index);
     break;
    case 'click':
     index=this.getAttribute('index');
     //点击之后固定
     im.style.left=imgWidth*index+'px';
     //点击了其中一个li之后的操作，移开鼠标之后不会弹回去
     this.onmouseout=false;
     for(var k=0;k<list.length;k++){
      list[k].setAttribute('jndex',k);

      list[k].onmouseover=function(){
       jndex=this.getAttribute('jndex');
       movecs(im,imgWidth*jndex);
      };
      list[k].onmouseout=function(){
       movecs(im,imgWidth*index);
      };
     }
     break;
    case 'mouseout':

     index=0;
     movecs(im,imgWidth*index);
     break;
   }
  }
 }



 /*list[i].onmouseover=function(){
   index=this.getAttribute('index');
   console.log(index);
   movecs(im,imgWidth*index);
  };
  list[i].onmouseout=function(){
   index=0;
   // im.style.left='0px';
   movecs(im,imgWidth*index);
  };

  list[i].onclick=function(){
   index=this.getAttribute('index');
   im.style.left=imgWidth*index+'px';
   alert(index);
  };*/
</script>
</body>
</html>
最终效果如下：云彩跟随鼠标移动，点击固定
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