I have made a little package to manage transparency in emacs (X11/Wayland, PGTK, no-PGTK) as a global minor-mode.
If someone could help me to test the package on emacs versions prior to 29, I would appreciate a lot.
Please check and comment.
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Very cool! I love window transparency.
As requested, I did some testing on older Emacs. On Emacs 27.1 all I can get is
Wrong number of arguments: (1 . 1), 2
I’ve cloned the repo into my .config/emacs, add-to-list’d it properly, required it, and even tried use-package when that didn’t work. No immediate functionality 
A totally separate suggestion: the docs may also want to suggest that transparency.el is for 29 & later right here, as documented in the code itself. I downloaded the wrong one at first due to the README’s suggestion of just copying the .el down. Whoops!
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Yes! The documentation is lacking.
I don’t know if I will keep support for emacs 28 and prior, or not, but that error is weird. I will check on that.
Thanks!
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