title: What is reference path in vscode
body: <p>I have downloaded Visual Studio Code for linux, and I am playing around with it. I wanted to use jQuery intellisense with it, and found a way to do it on the internet. Once I did it some sort of directive was added to my js file.</p>
  
  <pre><code>/// &lt;reference path="typings/jquery/jquery.d.ts"/&gt;
  </code></pre>
  
  <p>what does /// mean to pure javascript? it's not a comment, so how does javascript interpreter deal with this. also I am unable to find the path <code>typings/jquery/jquery.d.ts</code> in the local vscode folder. (although there is a typings folder there is no folder or file named jquery). So from where is this file linked to my js file?</p>