here is the working violin, please check the link to the violin
create a function to transition dateString to new Date()
$scope.formatString = function(format) {
var day = parseInt(format.substring(0,2));
var month = parseInt(format.substring(3,5));
var year = parseInt(format.substring(6,10));
var date = new Date(year, month-1, day);
return date;
}
dayDiff, ,
$scope.dayDiff = function(firstDate,secondDate){
var date2 = new Date($scope.formatString(secondDate));
var date1 = new Date($scope.formatString(firstDate));
var timeDiff = Math.abs(date2.getTime() - date1.getTime());
var diffDays = Math.ceil(timeDiff / (1000 * 3600 * 24));
alert(diffDays);
}