Does anyone know how the HTML5 data attributes (data-*
) can be implemented in XHTML without rendering the markup as invalid?
Is there a custom namespacing hack that would allow this on existing HTML elements?
Does anyone know how the HTML5 data attributes (data-*
) can be implemented in XHTML without rendering the markup as invalid?
Is there a custom namespacing hack that would allow this on existing HTML elements?
It can't be done. XHTML is a precursor of HTML5.
In the same way that CSS3 properties will never validate in a CSS2 validator, you cannot validate HTML5 according to XHTML.
You could use XHTML5. Then your mark-up would be XML, and valid XHTML5.
I think you could also use XML namespacing to use them on XHTML1 — I’m not very familiar with XML, so I’m not sure.
I think that both of these methods technically require you to serve your pages as XML (instead of text/html
), which Internet Explorer doesn’t support. But I suspect they’d work just fine in browsers even if you didn’t.