Vue 中获取当前时间并实时刷新

`
<template> 
<div>
{{nowDate}}{{nowWeek}}{{nowTime}}
</div> 
</template> 
<script> 
export default {
data(){
return {
nowDate: "", // 当前日期
nowTime: "", // 当前时间
nowWeek: "" // 当前星期 
} },
methods:{
dealWithTime(data) {
// 获取当前时间 let formatDateTime; 
let Y = data.getFullYear();
let M = data.getMonth() + 1; 
let D = data.getDate();
let H = data.getHours(); 
let Min = data.getMinutes();
let S = data.getSeconds();
let W = data.getDay();
H = H < 10 ? "0" + H : H;
Min = Min < 10 ? "0" + Min : Min; S = S < 10 ? "0" + S : S; 
switch (W) {
case 0: W = "日";
break;
case 1: W = "一"; 
break;
case 2: W = "二";
break;
case 3: W = "三";
break;
case 4: W = "四";
break; 
case 5: W = "五";
break;
case 6: W = "六"; 
break; 
default: break; 
} 
this.nowDate = Y + "年" + M + "月" + D + "日 ";
this.nowWeek = "周" + W ; this.nowTime = H + ":" + Min + ":" + S;
// formatDateTime = Y + "年" + M + "月" + D + "日 " + " 周" +W + H + ":" + Min + ":" + S;
}, 
}, mounted() {
// 页面加载完后显示当前时间 this.dealWithTime(new Date()) // 定时刷新时间 this.timer = setInterval(()=> {
this.dealWithTime(new Date()) // 修改数据date
}, 500) }, 
destroyed() { 
if (this.timer) { 
// 注意在vue实例销毁前，清除我们的定时器
clearInterval(this.timer);
} 
}
} 
</script>
<style lang="scss" scope>
</style>
`