Rule proposal: Error when adding a class that begins with a dot`classList.add('.`

[universemaster]

Description

Sometimes, we incorrectly try to add a class that begins with a dot, but linters and indeed browsers do not indicate that this is an error.

The error occurs because we use a dot in selectors for classname, but the dot is not part of the actual class name.

Fail

node.classList.add('.table-of-contents');

Pass

node.classList.add('table-of-contents')

Additional Info

No response

[sindresorhus]

It should apply to the other classList methods too.

[sindresorhus]

Accepted

[sindresorhus]

Please suggest a rule name.