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Detailed explanation of javascript implementation of dynamic sidebar examples

高洛峰Original: 2016-12-07 10:20:281697browse

javascript implements dynamic sidebar

In general, it is completed by using onmouseover and onmouseout.

First is the HTML structure

<body>
<div id="div1">
<span>侧边栏</span>
</div>
</body>

Then the css style:

#div1{
  width:150px;
  height:200px;
  background:#999999;
  position:absolute;
  left:-150px;}
span{
  width:20px;
  height:70px;
  line-height:23px;
  background:#09C;
  position:absolute;
  right:-20px;
  top:70px;}

The default style sidebar is hidden as shown in the picture:

Detailed explanation of javascript implementation of dynamic sidebar examples

When the mouse is moved in, as shown in the picture ：

Detailed explanation of javascript implementation of dynamic sidebar examples

The following is the complete code:





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<script>
window.onload=function(){
  var odiv=document.getElementById(&#39;div1&#39;);
  odiv.onmouseover=function ()
  {
     
    startmove(0,10);//第一个参数为div  left属性的目标值  第二个为 每次移动多少像素
     
    }
 odiv.onmouseout=function ()
 {
   startmove(-150,-10);
   }
  }
   
  var timer=null;
function startmove(target,speed)
{
    
  var odiv=document.getElementById(&#39;div1&#39;);
clearInterval(timer);
   timer=setInterval(function (){
     
    if(odiv.offsetLeft==target)
    {
      clearInterval(timer);
      }
      else
      { 
    odiv.style.left=odiv.offsetLeft+speed+&#39;px&#39;;
      }
     
    },30)
   
  }
   
</script>

 
<body>
<div id="div1">
<span>侧边栏</span>
</div>
</body>

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