Angular directive to validate that one date is greater than another.

validateDateGreaterThan.js

angular.module("app").directive("validateDateGreaterThan", function()
{
	return {
		require: "ngModel",
		scope:
		{
			firstDate: "=validateDateGreaterThan"
		},
		link: function(scope, element, attrs, ngModel)
		{
			ngModel.$validators.dateGreaterThan = function(modelValue)
			{
				return (new Date(modelValue) > new Date(scope.firstDate));
			};
		}
	};
});