Landing page of very recent TED Talks and YouTube-based ZIMs improperly displayed

[Jaifroid]

Unfortunately this regression has crept in due to the fix to TED, YouTube and Nautilus-based ZIM archives, and wasn't caught before release. The same fix as was implemented in the app for Nautilus needs to be applied more generically to YouTube-based ZIMs. The landing page of Type 1 (no-namespace) TED and YouTube-based ZIMs released since around June is broken in all Kiwix JS Windows and Linux apps in version 2.1.8 and below. Older Type 0 TED and YouTube ZIMs are not affected by this bug.

[Jaifroid]

This bug was actually a side-effect interacting with a latent bug. A bug was triggered once inline JavaScript was removed in openzim/youtube#154. The ZIMs in question have an odd dependency, in their JavaScript, on reading a favicon in the page's source code in order to discover the ZIM directory. The favicon's href was temporarily removed as part of preloading stylesheets, which was unnecessary for this ZIM type, but which did no harm in the older ZIMs with inline JS. It is exactly the same situation documented in openzim/nautilus#40 for Nautilus-style ZIMs. See in particular openzim/nautilus#40 (comment).

[Jaifroid]

A fix is in 50fe0bb and has been released to the PWA app v2.1.81. Because the Store app in SW mode depends on the PWA, then the Store app is also fixed. So, only the Electron and NWJS apps continue to be affected, and these will be updated in the next intermediate release. Issue will stay open till full release.