动态显示时间：

let timer = setInterval(() =>{this.settime()} ,1000)

settime(){
    //获取当前时间
	this.nowtime=new Date().toLocaleString()
},

定时器https://uniapp.dcloud.io/api/timer?id=setintervalhttps://uniapp.dcloud.io/api/timer?id=setinterval

获取当前时间： 

console.log(new Date())//获取当前时间
console.log(date.getFullYear())//获取当前年份
console.log(date.getMonth())//获取当前月份(+1)
console.log(date.getDate())//获取当前日期
console.log(date.getDay())//获取当前星期
console.log(date.getHours())//获取当前时
console.log(date.getMinutes())//获取当前分
console.log(date.getSeconds())//获取当前秒

 时间戳转换：

Date.parse(new Date())//输出：1637220812000
new Date().getTime()//输出：1637220812105

// 时间戳转换
function gettime(date){
    //date为时间戳格式
	let time=new Date(date*1000)
	let y = time.getFullYear();
	let m = time.getMonth()+1;
	let d = time.getDate();
	let h = time.getHours();
	let mm = time.getMinutes();
	let s = time.getSeconds();
	
	y = y > 9 ? y :'0'+y;
	m = m > 9 ? m :'0'+m;
	d = d > 9 ? d :'0'+d;
	h = h > 9 ? h :'0'+h;
	mm = mm > 9 ? mm :'0'+mm; 
	s = s > 9 ? s : '0'+s
	
	// let time_data=y+'-'+m+'-'+d+' '+h+':'+mm+':'+s
	let time_data=y+'-'+m+'-'+d
	return time_data
}