angular to allow user to enter integer only

 https://angular.io/api/forms/PatternValidator

<input name="firstName" ngModel pattern="[a-zA-Z ]*">

https://stackoverflow.com/questions/36009456/how-to-allow-only-integer-numbers-in-angular

angualr JS

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app>
    <div ng-controller="Main">
        <form name="form">
	  <input type="number" ng-model="person.age" ng-pattern="/^-?[0-9][^\.]*$/"/>
           <input type="number" ng-model="person.age1" ng-pattern="{{regex}}" />
        </form>
    </div>
</div>