近期在做排列五的彩票项目,每一期都有购彩时段,即用户打开这个排列五的页面时,会从服务器传来一个remaintime(离本次彩期结束的剩余时间),然后这个时间在客户端递减呈现给用户看,让用户获得本次彩期的剩余时间。

实现原理挺简单的,在此不在赘述,运行以下代码查看demo:

<!doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gbk" />
<title>index</title>
<style type="text/css">
em{color:#f00;}
</style>
</head>

<body>
<div id="remaintime"></div>
<script type="text/javascript">

var TheTime = function(){
 this.init.apply(this,arguments);
};

TheTime.prototype = {
 init: function(obj){
 var that = this;
 obj = that.buildParam(obj);
 that.callback = obj.callback;
 var container = that.container = document.getElementById(obj.container);
 container.innerHTML = '<em></em>小时<em></em>分钟<em></em>秒';
 var hourSpace = that.hourSpace = container.getElementsByTagName('em')[0];
 var minuteSpace = that.minuteSpace = container.getElementsByTagName('em')[1];
 var secondSpace = that.secondSpace = container.getElementsByTagName('em')[2];
 if(obj.remaintime==0){
  that.resetTime();
  return;
 }

 that.hours = Math.floor(obj.remaintime/3600);
 that._remainder1 = obj.remaintime % 3600;
 that.minutes = Math.floor(that._remainder1/60);
 that.seconds = that._remainder1 % 60;
 var timer = that.timer = setInterval(function(){
  that.renderTime.apply(that);
 },1000);
 },
 buildParam: function(obj){
 obj = {
  //container为dom节点的id
  container: obj.container || 'container',
  remaintime: Number(obj.remaintime) || 0,
  //倒计时完成后的回调
  callback: obj.callback || new Function
 };
 return obj;
 },
 resetTime: function(){
 var that = this;
 that.container.innerHTML = "已经截止";
 },
 //刷新时间
 renderTime: function(){
 //debugger;
 var that = this;
 if(that.seconds>0){
  that.seconds--;
 }else{
  that.seconds = 59;
  if(that.minutes>0){
  that.minutes--;
  }else{
  that.minutes = 59;
  if(that.hours>0){
   that.hours--;
  }
  }
 }
 
 //时刻监听
 if(that.hours==0 && that.minutes==0 && that.seconds==0){
  //执行回调
  that._callback();
 }
 var bitHandle = that.bitHandle;

 var _hour = bitHandle(that.hours);
 var _minute = bitHandle(that.minutes);
 var _second = bitHandle(that.seconds);
 that.hourSpace.innerHTML = _hour;
 that.minuteSpace.innerHTML = _minute;
 that.secondSpace.innerHTML = _second;
 },
 //对于位数的处理,确保返回两位数
 bitHandle: function(num){
 var str = num.toString();
 if(str.length<2){
  str = 0 + str;
 }
 return str;
 },
 _callback: function(){
 var that = this;
 clearInterval(that.timer);
 that.callback();
 }

};

new TheTime({
 //容器id
 container: 'remaintime',
 //服务器返回的剩余时间,单位为秒
 remaintime: 10000,
 //倒计时完成时的回调
 callback: function(){
 document.getElementById('remaintime').innerHTML = '已截止';
 }
});
</script>
</body>
</html>

标签:
JavaScript,倒计时,类

免责声明:本站文章均来自网站采集或用户投稿,网站不提供任何软件下载或自行开发的软件! 如有用户或公司发现本站内容信息存在侵权行为,请邮件告知! 858582#qq.com
狼山资源网 Copyright www.pvsay.com

评论“JavaScript实现的一个倒计时的类”

暂无“JavaScript实现的一个倒计时的类”评论...

P70系列延期,华为新旗舰将在下月发布

3月20日消息,近期博主@数码闲聊站 透露,原定三月份发布的华为新旗舰P70系列延期发布,预计4月份上市。

而博主@定焦数码 爆料,华为的P70系列在定位上已经超过了Mate60,成为了重要的旗舰系列之一。它肩负着重返影像领域顶尖的使命。那么这次P70会带来哪些令人惊艳的创新呢?

根据目前爆料的消息来看,华为P70系列将推出三个版本,其中P70和P70 Pro采用了三角形的摄像头模组设计,而P70 Art则采用了与上一代P60 Art相似的不规则形状设计。这样的外观是否好看见仁见智,但辨识度绝对拉满。