倒计时15分钟-兼容ios手机效果demo(整理)

this.timer = setInterval(() => {
  this.countDown()
}, 1000);
var time="2023-02-21 14:14:49"; //下单时间
var to = new Date(time.replace(/-/g, "/"));
var now = new Date();
// 乘以15分钟-计算15分钟倒计时
var deltaTime = to.getTime() + 15 * 60 * 1000 - now.getTime();
// alert(deltaTime)
//超时就停止倒计时-操作某些事件
if (deltaTime <= 0) {
  this.dataForm.orderAccepting = 4;
  window.clearInterval(this.timer);
  return;
}
var d= deltaTime / (1000 * 60 * 60 * 24);
var h = Math.floor(deltaTime / 1000 / 60 / 60 % 24); 
var m = Math.floor(deltaTime / 1000 / 60 % 60);
var s = Math.floor(deltaTime / 1000 % 60);
//把时间的数字转成字符串， 如果时分秒不足10， 则前面补0
// var timeStr = ""+ (h/10>=1?h=h:h="0"+h) + (m/10>=1?m=m:m="0"+m) + (s/10>=1?s=s:s="0"+s);
var timeStr = ""+ (m/10>=1?m=m:m="0"+m) + (s/10>=1?s=s:s="0"+s);
// console.log(timeStr,'55555');
this.minute = timeStr.substring(0, 2);
this.sec = timeStr.substring(2, 4);