Since it is a single page application, its harder to trawl through its history, however: https://web.archive.org/web/20250130094532jm_/https://popthe...

Searching through the prior index file for "Credits" or the such, yields no results

React et al is credited somewhat however.

Wow, I didn't even notice or realize it was a link!

Edit: it was probably added afterwards and donations were removed.