There is no way for a plugin to hook or alter index.html

[SethBacon]

Im trying every which way to get some middleware to inject into index.html or main.jellyfin.bundle.js from a plugin (based on the template) but it is impossible, or fuck you, or something..

Jellyfin server plugins cant mess with jellyfin web?

[crobibero]

No, that is not supported.

[SethBacon]

Thank you, its a relief to know it wasn't my fault anyways. I'll go back to editing js chunks like a proper goon, but sleep soundly in my goon den knowing there wasn't a better way.

[Namo]

Hey,

Just wanted to mention, that it is possible.
I do it (copied it myself from Jellyscrub)
https://github.com/Namo2/InPlayerEpisodePreview

The general approach here is that you inject a new script tag into index.html on server start (can fail due to file permissions)
You will bundle a js file with your dll containing every change etc.
The script tag in index.html will call your controller/endpoint which will return the js scipt file from step 2

Sry @SethBacon for disturbing your peacful sleep
and @ devs for any question or problem that will come up because of plugins which do unsupported things