Quote:
Originally Posted by nabsltd
I would be shocked if the underlying HTML/CSS renderer for a reader that understands EPUB3 changes when the reader encounters an EPUB2.
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You shouldn't be shocked at all. Bookari uses Readium for its EPUB3 rendering engine and RMSDK for EPUB2. Many dedicated devices also use entirely different engines for rendering the different formats they make available via their walled gardens. Do you think Kobo's kepubs are rendered with the same engine they use for presenting their regular epubs?
In all honesty, I would be more shocked if a reading system that supports EPUB3
didn't use an entirely different rendering engine than it does for its EPUB2 content.