title: TypeScript var vs import
body: <p>In TypeScript, what is the difference between </p>
  
  <pre><code> import http = require('http');
  </code></pre>
  
  <p>and </p>
  
  <pre><code> var http = require('http');
  </code></pre>
  
  <p>I am seeing both ways being used in code source, are they interchangeable?</p>