代码如下：
<!DOCTYPE html>
<html> <head>
<meta charset="UTF-8">
<title>Title</title>
<style>
#div1 {
width: 100px;
height: 100px;
position: absolute;
left: 400px;
top: 200px;
background: red;
}
</style>
</head> <body>
<div id="div1"></div> <script>
var div1 = document.querySelector('#div1'); document.onclick = function() { /*
* 抖动：
* 1. 每次改变一下元素的位置
* 按照一个中心点进行偏移，假设中心点left原始是400，那么每次就以left：400为中心做位置的移动
* 380 -> 420
* */ // div1.style.left = '380px';
// div1.style.left = '420px'; var a = true; setInterval(function() { /*
* 根据a的值，做不同的设置
* */
div1.style.left = (a ? 380 : 420) + 'px';//这样可以实现小幅度的抖动效果，但是大幅度的抖动就会显得很生硬
a = !a; }, 30); }
/*缓动代码*/
var tween = {
linear:function(t,b,c,d){
return c*t/d + b;
},
easeIn:function(t,b,c,d){
return c * ( t /= d ) * t + b;
},
strongEaseIn:function(t,b,c,d){
return c * ( t /= d ) * t * t * t * t + b;
},
strongEaseOut:function(t,b,c,d){
return c * ( ( t = t / d -1 ) * t * t * t * t +1 ) + b;
},
sineaseIn:function(t,b,c,d){
return c * ( t /= d ) * t * t + b;
},
sineaseOut:function(t,b,c,d){
return c * ( ( t = t / d -1 ) * t * t *t +1 ) + b;
}
}; var Animate = function(dom){
this.dom = dom;
this.startTime = 0;
this.startPos = 0;
this.endPos = 0;
this.propertyName = null;
this.easing = null;
this.duration = null;
} Animate.prototype.start = function(propertyName,endPos,duration,easing){
this.startTime = +new Date;
this.startPos = this.dom.getBoundingClientRect()[propertyName];
this.propertyName = propertyName;
this.endPos = endPos;
this.duration = duration;
this.easing = tween[easing]; var self = this;
var timeId = setInterval(function(){
if(self.step() === false){
clearInterval(timeId);
}
},19);
} Animate.prototype.step = function(){
var t = +new Date;
if(t>=this.startTime + this.duration){
this.update(this.endPos);
return false;
}
var pos = this.easing(t-this.startTime, this.startPos, this.endPos - this.startPos, this.duration);
this.update(pos);
} Animate.prototype.update = function(pos){
this.dom.style[this.propertyName] = pos + 'px';
}
var b = true;
var div = document.getElementById('div');
var animate = new Animate(div);
setInterval(function() { animate.start('left',(a ? 380 : 420),1000,'strongEaseOut');//如果用缓动的效果来实现较大幅度的抖动，那视觉上就可以看到更舒适了a = !a;
}, 30);
</script> </body> </html>