I want to know if there’s an existing Javascript library for validating HTML, preferably not one that relies on a web API.
The closest I’ve found to this is John Resig’s HTML parser, but that seems to be more about fixing HTML and converting it to XML.
So is there something out there already? And if not, how difficult (and lengthy) would it be to adapt John Resig’s parser?
No, there isn’t one. However I am writing one: https://github.com/peterjwest/html_validator