vue中倒计时组件的实例代码

<template> 
 <span :endTime="endTime" :callback="callback" :endText="endText"> 
 <slot> 
 {{content}} 
 </slot> 
 </span> 
</template> 
<script> 
 export default { 
 data(){ 
 return { 
 content: '', 
 } 
 }, 
 props:{ 
 endTime:{ 
 type: String, 
 default :'' 
 }, 
 endText:{ 
 type : String, 
 default:'已结束' 
 }, 
 callback : { 
 type : Function, 
 default :'' 
 } 
 }, 
 mounted () { 
 this.countdowm(this.endTime) 
 }, 
 methods: { 
 countdowm(timestamp){ 
 let self = this; 
 let timer = setInterval(function(){ 
 let nowTime = new Date(); 
 let endTime = new Date(timestamp * 1000); 
 let t = endTime.getTime() - nowTime.getTime(); 
 if(t>0){ 
 let day = Math.floor(t/800000); 
 let hour=Math.floor((t/3600000)%24); 
 let min=Math.floor((t/60000)%60); 
 let sec=Math.floor((t/1000)%60); 
 hour = hour < 10 ? "0" + hour : hour; 
 min = min < 10 ? "0" + min : min; 
 sec = sec < 10 ? "0" + sec : sec; 
 let format = ''; 
 if(day > 0){ 
 format = `${day}天${hour}小时${min}分${sec}秒`; 
 } 
 if(day <= 0 && hour > 0 ){ 
 format = `${hour}小时${min}分${sec}秒`; 
 } 
 if(day <= 0 && hour <= 0){ 
 format =`${min}分${sec}秒`; 
 } 
 self.content = format; 
 }else{ 
 clearInterval(timer); 
 self.content = self.endText; 
 self._callback(); 
 } 
 },1000); 
 }, 
 _callback(){ 
 if(this.callback && this.callback instanceof Function){ 
 this.callback(...this); 
 } 
 } 
 } 
 } 
</script>

<count-down endTime="1590761620" :callback="callback" endText="已经结束了"></count-down> 
methods:{
callback:function(){
}
}