Re: Popup footnotes in EPUB 3

Thank you Laurent. To save you all reading the entire conversation thread
in the GitHub issue tracker, here are useful pointers to existing (good?)
practice:

Apple:
https://help.apple.com/itc/booksassetguide/en.lproj/itccf8ecf5c8.html
"Use the <aside> element when you want to hide the footnote"

Kobo:
https://github.com/kobolabs/epub-spec/blob/master/README.md#footnotesendnotes-are-fully-supported-across-kobo-platforms
https://github.com/kobolabs/epub-spec/issues?q=is%3Aissue%20epub%20popup%20footnote

Lots of debating among content creators and readers, about the lack of
interoperable "popup footnote" UX in reading systems:
https://www.google.com/search?q=epub+popup+footnotes+aside+site:www.mobileread.com

Feel free to add to this short list of references, and I will update our
comment thread.

Thank you!
Regards, Daniel



On Wed, 5 Mar 2025 at 14:56, Laurent Le Meur <laurent.lemeur@edrlab.org>
wrote:

> Hello,
>
> Please read https://github.com/edrlab/thorium-reader/issues/2833 and
> Daniel's comments about the lack of specification of popup footnotes.
> I found definitions for "footnote" and "noteref" in the EPUB 3.3 spec, but
> nothing related to popup footnotes in the RS spec.
> The upcoming work on EPUB 3.4 seems like a good time to properly specify
> popup footnotes.
>
> Best regards,
> Laurent Le Meur | EDRLab
>
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