javascript"> shijian() {
const EndTIME = new Date(开始时间变量);
const NowTime = new Date();
const usedTime = EndTIME - NowTime;
const days = Math.floor(usedTime / (24 * 3600 * 1000));
const leavel = usedTime % (24 * 3600 * 1000);
const hours = Math.floor(leavel / (3600 * 1000));
const leavel2 = leavel % (3600 * 1000);
const minutes = Math.floor(leavel2 / (60 * 1000));
const leavel3 = leavel2 % (60 * 1000);
const seconds = Math.round(leavel3 / 1000);
this.day = days < 10 ? `0${days}` : days;
this.hour = hours < 10 ? `0${hours}` : hours;
this.minutes = minutes < 10 ? `0${minutes}` : minutes;
this.second = seconds < 10 ? `0${seconds}` : seconds;
},
javascript"> this.shijian();
setInterval(() => {
this.shijian();
}, 1000);