I'm generating page numbers using:

a::after { content: target-counter(attr(href), page); }

This works when the id attribute is on a section element, or when the id attribute is on table or tr elements, but not when the id is on a tbody element.

Right, currently I think you would need to link to the first row in the tbody.

I have just realized that we still can't create a hyperlink to a <tbody> element.
Is there any reason that forbids that?

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Johann