计数器
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<style>
ul {
width:100px;
height: 50px;
margin:40px auto;
list-style: none;
padding: 0;
overflow: hidden;
border:1px dashed green;
position: relative;
}
li {
width:100%;
height: 100%;
font-size: 50px;
line-height: 50px;
text-align: center;
color:red;
position: absolute;
background-color: gray;
transition-duration : 1s;
transform: translateY(50px)
}
.prev {
transform: translateY(-50px)
}
.curr {
transform: translateY(0px);
z-index : 9;
}
.next {
transform: translateY(50px)
}
</style>
<title>number</title>
<script>
/**
* 计数器
* @param {Element} eles [description]
*/
function Animate(eles){
var idx = 0;
this.index = idx;
this.eles = eles;
this.max = eles.length-1;
this.init();
}
/**
* 初始状态
* @return {[type]} [description]
*/
Animate.prototype.init = function(){
this.eles[0].className = 'curr';
}
Animate.prototype.start = function(){
var i = this.index;
var max = this.max
if(this.index == 0){
this.prev = null;
this.curr = this.eles[i];
this.next = this.eles[i+1];
}else if(i == max){
this.prev = this.eles[i-1];
this.curr = this.eles[i];
this.next = null;
}else{
this.prev = this.eles[i-1];
this.curr = this.eles[i];
this.next = this.eles[i+1];
}
this.doAnit();
}
/**
* 循环计数
* @return {[type]} [description]
*/
Animate.prototype.doAnit = function(){
if(!this.next){
this.init();
this.prev.removeAttribute('class');
this.curr.className = 'prev';
this.index = -1;
}else if(!this.prev){
this.curr.className = 'prev';
this.next.className = 'curr';
this.eles[this.max].removeAttribute('class')
}else{
this.prev.removeAttribute('class');
this.curr.className = 'prev';
this.next.className = 'curr';
}
this.index++;
var that = this;
var t = setTimeout(function(){
clearTimeout(t)
that.start();
},1000)
}
/**************************************************/
window.onload = function(){
var noop = document.querySelector('#noop');
document.onclick = function(){
a.start();
this.onclick = null;
}
var a = new Animate(noop.children);
}
</script>
</head>
<body>
<ul id="noop">
<li>0</li>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
<li>7</li>
<li>8</li>
<li>9</li>
</ul>
</body>
</html>
