Hi, I would like to be able to add aria-describedby, aria-label, aria-labelledby, role, to my html content, but TinyMCE strips it out, even after the tags have been added to custom tags in HTML Filtering. Is there a workaround for this? I have Plone 4.3.18 installed. Thank you!
In Plone 4.x, it is probably the safe_html transform that is stripping out attributes. That can be disabled in the ZMI under portal_transforms, go to safe_html and there you can set the value to 1 do disable the entire machinery.
Obligatory warning: this might lead to untrustworthy editors creating unsafe html, it might put red socks in with your white laundry, etc.
Thanks for this information and warning. It is really helpful!