title: How can I use the querystring lib in node to append additional querystrings
body: <p>I have a url which looks like this:</p>
  
  <p><a href="http://example.com?parm1=foo" rel="nofollow noreferrer">http://example.com?parm1=foo</a></p>
  
  <p>I want to use the node querystring <a href="https://nodejs.org/api/querystring.html" rel="nofollow noreferrer">lib</a> to append additional params such as like this:</p>
  
  <p><a href="http://www.example.com?parm1=foo&amp;parm2=bar&amp;parm3=test" rel="nofollow noreferrer">http://www.example.com?parm1=foo&amp;parm2=bar&amp;parm3=test</a></p>
  
  <p>I saw that I can define my params like this:</p>
  
  <pre><code>querystring.stringify({ parm2: 'bar', param3: 'test' });
  </code></pre>
  
  <p>I'm just not sure how to append this to my current url though</p>