javascript - 如何检查时间是否为00 :00 in my case?

Question

我正在尝试alert()如果这个倒计时器{{sale.vtimer |日期:'mm:ss'}} 去了 00:00:

$scope.updateVtimerValue = function (vtimerValue){
    $.each(vtimerValue, function(k, v) {
        for (var i =0; i < $scope.sales.length ; i ++) {
            if($scope.sales[i].orderid == v.orderid){
                var nDate = Date.now();
                var nTime = Date.parse(v.xtime);
                $scope.sales[i].vtimer = nTime - nDate;
            }
        }
    });
}

<tr ng-repeat="sale in sales" ng-cloak>
   <td>{{sale.vtimer | date:'mm:ss'}}</td>
</tr>

Answer 1

如果现在与上一帧之间的差异小于或等于 0，则您已达到 00 秒

if($scope.sales[i].vtimer <= 0){
     alert("Timer is over");
}