An AngularJS decorator directive to only allow numeric values.

numericOnly.ts

    numericOnly.$inject = ['$log'];
    function numericOnly(
        $log: ng.ILogService): ng.IDirective {

        return <ng.IDirective>{
            restrict: 'A',
            scope: true,
            link: link
        };

        function link($scope, $element, $attrs) {
            $element.bind('keydown', function (event) {
                var charCode = (event.which) ? event.which : event.keyCode;
                if (charCode > 31 && (charCode < 48 || charCode > 57)) {
                    return false;
                }
                return true;
            });
        }
    }
    angular.module('app').directive('numericOnly', numericOnly);