Allow only numbers to be typed into a text box angularjs

There is an input number directive which I belive can do just what you want.

<input type="number"
   ng-model="{string}"
   [name="{string}"]
   [min="{string}"]
   [max="{string}"]
   [required]
   [ng-required="{string}"]
   [ng-minlength="{number}"]
   [ng-maxlength="{number}"]
   [ng-pattern="{string}"]
   [ng-change="{string}"]>

the official doc is here: http://docs.angularjs.org/api/ng.directive:input.number

 <input type="text" name="number" numbs-only>

.directive('numbsonly', function () {
    return {
      require: 'ngModel',
      restrict: 'A',
      link: function (scope, element, attr, ctrl) {
        function inputValue(val) {
          if (val) {
            var digits = val.replace(/[^0-9.]/g, '');

            if (digits !== val) {
              ctrl.$setViewValue(digits);
              ctrl.$render();
            }
            return parseFloat(digits);
          }
          return undefined;
        }            
        ctrl.$parsers.push(inputValue);
      }
    };
 });

You could easily use the ng-pattern.

ng-pattern="/^[1-9][0-9]{0,2}(?:,?[0-9]{3}){0,3}(?:\.[0-9]{1,2})?$/"