3 ms·
Only on XHTML, actually.
by victorvscn 4y ago
Only on XHTML, actually.
- SahAssar 4y agoSource? Seems to be required based on https://validator.w3.org/nu/ https://validator.w3.org/nu/ which is also linked as the validator to use for WHATWG from https://whatwg.org/validator/ https://whatwg.org/validator/