what is the alternative of angular.isString() in angular2?
<p>I am working on a project in angular2 and curious to know if there is any mean by which I can use angularjs functionalities in my angular2 application.</p>

<p>for ex.</p>

<p><strong>in angularjs</strong>, I used to do following operations:</p>

<ol>
<li><em>angular.isString(value)</em></li>
<li><em>angular.isArray(value)</em></li>
<li><em>angular.copy(value)</em></li>
</ol>

<p>I just want to know that is there any module or package which can help me do above operations <strong>in angular2/typescript</strong>?</p>

<p>Thanks in advance.</p>