抖起来的图片

function shake(obj,attr,endfn)
{
    if( obj.shaked ) { return;  }
    obj.shaked = true;
    
    var num = 0;
    var timer = null;
    var arr = [];
    var pos = parseInt(getstyle(obj,attr));
    
    for( var i = 20; i > 0; i-=2 )
    {
        arr.push(i,-i);
    }
    arr.push(0);
    
    clearInterval(obj.shake);
    obj.shake = setInterval(function ()
    {
        obj.style[attr] = pos + arr[num] +'px';
        num++;
        if(num==arr.length)
        {
            clearInterval(obj.shake);
            endfn&&endfn();
            obj.shaked = false;
        }
    },50);
};

function getstyle(obj,attr)
{
    return obj.currentStyle?obj.currentStyle[attr]:getComputedStyle(obj)[attr];
}

 

转载于:https://www.cnblogs.com/mayufo/p/4179738.html