title: How can I implement autocomplete within a comment?
body: <p>I am building a vscode extension that automatically completes the jsdoc syntax inside a javascript comment.
  So I tried adding an autocomplete trigger with registerCompletetionItemProvider, but it didn't work as expected.
  It works fine because it triggers outside the comment, but it doesn't fire at all within the comment.
  <a href="https://i.stack.imgur.com/16L2w.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/16L2w.png" alt="enter image description here" /></a></p>
  <p>Could you get any advice on this?</p>