仅数字输入的自定义指令不适用于控制器绑定的div内的HTML

Question

I was searching for custom directive for number only input for AngularJS JavaScript and I got hands on a working directive but it isn't working when I am using it for input box which is inside body or div bound to a controller.

HTML:

<div ng-app="app" ng-controller="xyz">
  <p>Demo of AngularJS Numbers Only Directive</p>
  <p>Input below will accept only numbers.</p>
  <p><input type="text" ng-model="val" numbers-only  /></p>
</div>

Script:

var app = angular.module('app', []);
app.directive('numbersOnly', function () {
    return {
        require: 'ngModel',
        link: function (scope, element, attr, ngModelCtrl) {
            function fromUser(text) {
                if (text) {
                    var transformedInput = text.replace(/[^0-9]/g, '');

                    if (transformedInput !== text) {
                        ngModelCtrl.$setViewValue(transformedInput);
                        ngModelCtrl.$render();
                    }
                    return transformedInput;
                }
                return undefined;
            }            
            ngModelCtrl.$parsers.push(fromUser);
        }
    };
});

JSFiddle: Click Here

It Works properly if I delete the controller part from the div.

Answer 1

It doesn't work because your controller isn't defined, thus throwing an error, breaking the angular directive too.

Just define the controller in your JS:

app.controller('xyz', function() {return {};})

and it should work ( Updated JSFiddle )

Answer 2

You have an undefined controller, removing it will fix it:

http://jsfiddle.net/kgp0z2y9/3/

Or create it

app.controller('xyz', function(){});

http://jsfiddle.net/kgp0z2y9/5/