Format credit card number

Question

How to format and validate a credit card number with spaces between each 4 digit while typing:

eg: 4464 6846 4354 3564

I have tried:

Answer 1

Find

Plunker for Formatting Credit Card Numbers

using angularjs directive. Format Card Numbers in xxxxxxxxxxxx3456 Fromat.

angular.module('myApp', [])

   .directive('maskInput', function() {
    return {
            require: "ngModel",
            restrict: "AE",
            scope: {
                ngModel: '=',
             },
            link: function(scope, elem, attrs) {
                var orig = scope.ngModel;
                var edited = orig;
                scope.ngModel = edited.slice(4).replace(/\d/g, 'x') + edited.slice(-4);

                elem.bind("blur", function() {
                    var temp;
                    orig  = elem.val();
                    temp = elem.val();
                    elem.val(temp.slice(4).replace(/\d/g, 'x') + temp.slice(-4));
                });

                elem.bind("focus", function() {
                    elem.val(orig);
               });  
            }
       };
   })
  .controller('myCtrl', ['$scope', '$interval', function($scope, $interval) {
    $scope.creditCardNumber = "1234567890123456";
  }]);