title: How to add code comments in markdown that DO NOT render into html?
body: <p>I want to include comments (aka code comments) to my markdown.</p>
  
  <p>Something like this</p>
  
  <p>// I want this line to not render in the html</p>
  
  <p>I've tried the different approaches that javascript uses but they all render as normal text and show in the final markup.</p>
  
  <p>What's the nicest way I could achieve comment like functionality?</p>