html - change input text value with angular -


i have basic input displaying timestamp in milliseconds, saved on scope.

however, want display formatted time, , dont want store new variable.

i looking solution this:

ng-model="parsetime(timestamp)"

and in controller:

$scope.parsetime = function(systemtime) {     var time = new date(systemtime);            return time.todatestring(); };

is not possible, can using watch 

$scope.$watch('timestamp', function(value) {   if (value) {     var time = new date(value);            $scope.timestamp= time.todatestring();   } });

html should 

ng-model="timestamp"

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