JSFiddle - React, Tailwind, and code Playground

HTML

<body ng-app="myApp">
    <div ng-controller="MyCtrl">
        <select ng-model="selectedNum" ng-change="numberSelected()">
            <option value="10">10</option>
            <option value="20">20</option>
            <option value="30">30</option>
            <option value="40">40</option>
            <option value="50">50</option>
        </select>
    </div>
</body>

JavaScript

angular.module('myApp', []).controller('MyCtrl', function($scope) {

    $scope.selectedNum = 10;
    
    $scope.numberSelected = function(){
        alert(typeof $scope.selectedNum);
    }
});