Enabling realtime HTML validation in VS Code and Atom
<p>I am having a hard time finding out how to do this in either.  I would have expected that it would be built-in, as it is in VS Studio; where if a tag isn't closed, a curly underscore appears as a warning.<br>
Incidentally JS and CSS code seems to be natively validated in both Code and Atom.  So why not HTML?</p>

<p>PS: even Notepad++ complains when a tag isn't closed..</p>