Hamed Ali Khan Hamed Ali Khan - 17 days ago 5
AngularJS Question

Restrict input as numbers on input fields using AngularJS

I am trying to restrict input as numbers on below fields

Postal Code:
<input type="text" id="zipCode1" name="zipCode1" size="4" maxlength="5" ng-model="zipCode1" ng-change="myNumbers(zipCode1)" />
<input type="text" id="zipCode2" name="zipCode2" size="3" maxlength="4" ng-model="zipCode2" ng-change="myNumbers(zipCode2)" />


it doesn't work with

$scope.myNumbers = function(fieldName){
var tN = fieldName.replace(/[^\d]/g, "");
if(tN != fieldName)
fieldName = tN
};


It works with below code but changing both the fields

$scope.$watch('myNumbers', function() {
var tN = $scope.myNumbers.replace(/[^\d]/g, "");
if(tN != $scope.myNumbers)
$scope.myNumbers = tN;
})


Need to change the value for the input field where user is typing and not both

Answer

Use the directive found here: http://stackoverflow.com/a/19675023/149060 instead of the ng-change function. Replicated here for easy reference:

angular.module('app').
  directive('onlyDigits', function () {

    return {
        restrict: 'A',
        require: '?ngModel',
        link: function (scope, element, attrs, ngModel) {
            if (!ngModel) return;
            ngModel.$parsers.unshift(function (inputValue) {
                var digits = inputValue.split('').filter(function (s) { return (!isNaN(s) && s != ' '); }).join('');
                ngModel.$viewValue = digits;
                ngModel.$render();
                return digits;
            });
        }
    };
});
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