JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app="myApp" ng-controller="myController">
     <input type="checkbox" ng-model="IsEnabled">
    <select ng-disabled="!IsEnabled"><option value="1">1</option><option value="2">2</option><option value="3">3</option><option value="4">4</option></select>
</div>

JavaScript

var app = angular.module('myApp', []);

app.controller('myController', function($scope) {
    $scope.IsEnabled = true;                                                                                 
});