vue商品倒计时demo效果（整理）

let that = this;
setInterval(() => {
	var intDiff = parseInt(that.detailsForm.time_surplus); //倒计时总秒数
	var day = 0,
		hour = 0,
		minute = 0,
		second = 0; //时间默认值
	if (intDiff > 0) {
		day = Math.floor(intDiff / (60 * 60 * 24));
		hour = Math.floor(intDiff / (60 * 60)) - (day * 24);
		minute = Math.floor(intDiff / 60) - (day * 24 * 60) - (hour * 60);
		second = Math.floor(intDiff) - (day * 24 * 60 * 60) - (hour * 60 * 60) - (minute * 60);
	}
	if (minute <= 9) minute = '0' + minute;
	if (second <= 9) second = '0' + second;
	that.detailsForm.time_surplus--;	//总秒数减减
	that.second = second;
	that.minute = minute;
	console.log(day, hour, minute, second, '44444444');
}, 1000);