ngrChange - ng REAL change - only trigger change on value change at pressing enter or blur out.

ngrChange.js

app.directive('ngrChange', function() {
    return {
        require: 'ngModel',
        link: function (scope, element, attrs) {
            var valueBefore = element.val();

            element.bind('focus', function() {
                if (valueBefore !== element.val())
                    valueBefore = element.val();
            });

            element.bind('keydown keypress', function(e) {
                if (e.which !== 13
                 || element.val() === valueBefore)
                    return;

                valueBefore = element.val();

                scope.$apply(function() {
                    scope.$eval(attrs.ngrChange);
                });
            });

            element.bind('blur', function(e) {
                if (element.val() === valueBefore)
                    return;

                valueBefore = element.val();

                scope.$apply(function() {
                    scope.$eval(attrs.ngrChange);
                });
            });
        }
    };
});