There is scripting on them, and afaik it’s actually javascript. It’s a limited version of it (the actual specification was supposed to allow for data sending and receiving, and complete arbitrary code), but it’s enough to run code. A madlad has ported doom and linux to PDF, and you can fully run them on a compliant enough pdf viewer.
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epubs are effectively self contained html files, but the scripting is not there (afaik)
There is scripting on them, and afaik it’s actually javascript. It’s a limited version of it (the actual specification was supposed to allow for data sending and receiving, and complete arbitrary code), but it’s enough to run code. A madlad has ported doom and linux to PDF, and you can fully run them on a compliant enough pdf viewer.
LinuxPDF
DoomPDF
(My bad, I wanted to reply to a higher post, but I’m gonna leave this here cuz federation is sometimes weird with deleted comments)