[ghmerrill]

I've just finished the body of my book in Sigil in Epub3. It passes epubcheck with no errors and only a couple of trivial warnings. It looks great in several readers I've tried.

I'm now experimenting with a few features I'd like to add, and these include (1) use of :target for highlighting citations in the References section, (2) Tooltips, and (3) popup notes.

I haven't tried the popup notes yet, but I have the :target stuff and the tooltips working in my Sigil version (and displaying as expected in Sigil's Preview window). However, when I move the book into either Calibre or Adobe Digital Editions, the tooltips work, but the :target code fails (all it attempts to do is to highlight by setting the background color). It does jump to the link target, but the background isn't changed.

What's going on here? Do these readers just not support :target?

I'm doing these simple "pre-tests" before I invest time in coding up a lot of this stuff for my intended Kindle edition. But now I'm concerned about support. I know that Kindle at least supports popup notes (I have a Kindle book in which those work fine -- so I know it can be done).

But what's the problem I'm running into with :target in Adobe Digital Editions (4.5) and Calibre?