Codewars isn't recognizing the Javascript padStart() method for me. Is this happening for anyone else?

I think it would also be useful to include more abstract test cases.
For example:

'START WITH CAPS' => 'StArT WiTh CaPs'  
'wHO WrItES lIKe ThiS' => 'WhO WrItEs LiKe ThIs'

This at least drives home from the details that odd characters must be lower cased.