I am trying Visual Studio Code lately and i\'ve noticed that when i try to add a line comment in an HTML file (using Ctrl+/ or Ctrl+K Ctrl+C) instead of this: "],
"description": "Comment HTML line"
}
You can insert that right after the comment in File > Preferences > User Snippets > {YourExtension}
Then, when you start typing 'chtml' in that kind of files, IntelliSense will prompt that snippet.
Maybe this is a workarround, but it works excellent for me. Hope it helps!
https://code.visualstudio.com/docs/customization/userdefinedsnippets