disallow numeric entry in a input field

numeric.js

app.directive('ng-numeric', function($log) {
  return {
    require: 'ngModel',
    link: function (scope, element, attr, ngModelCtrl) {
      function fromUser(text) {
        var transformedInput = text.replace(/[^0-9]/g, '');
        $log.info(transformedInput);
        if(transformedInput !== text) {
            ngModelCtrl.$setViewValue(transformedInput);
            ngModelCtrl.$render();
        }
        return transformedInput;  // or return Number(transformedInput)
      }
      ngModelCtrl.$parsers.push(fromUser);
    }
  }; 
});