Masking setting value is not working if preset value's char contains in new set value

[AbrarJahin]

Hi, I am facing this value.

Detail like, I am setting masking format like this-

5####

So, in the masked value, 5 will be first char and there will be 4 other numbers following it.

I am trying to set the value like this-

$('input[name="screeningNum"]').val($scope.viewModel.subjectDetails.screeningNumber);

where,

$scope.viewModel.subjectDetails.screeningNumber = "55555"

So, I am getting something like this-

5____

Can anyone please help?

My masking input is something like this-

<input type="text" name="randomizationNum"
        data-ng-hide="!isModified()"
        data-ng-maxlength="50"
        data-ng-pattern="/^[a-zA-Z0-9#*\-_]*$/"
        data-input-mask="convertMask(editingSubjectDetails.randomizationNumberMask)"
        data-mask-option="randomizationMaskOption"
        data-ng-model="editingSubjectDetails.randomizationNumber" 
        data-ng-change="validateRandomizationNumber()"
        data-toggle="popover"
        data-trigger="focus" />