JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app="app">
    <div ng-controller="testCtrl">
        <form ng-submit="selectChanged()">
        <select ng-model="first" required="required">
            <option>choose</option>
            <option value="2">2</option>
        </select>
            <input type="submit" value="test"/>
        </form>
    </div>
</div>

JavaScript

angular.module('app', []).controller('testCtrl', function ($scope) {
    $scope.selectChanged = function () {
         alert($scope.first); 
    };
});