angular.isString()

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.4.1/angular.min.js"></script>
<h1>angular.isString()</h1>

JavaScript

console.log(angular.isString('hello'));  //  true
console.log(angular.isString(new String('hello')));  //  false!
console.log(angular.isString(hello)); 
var foo = new String('foo');

console.log(foo);