Last weekend I played around with an own version of https://getkirby.com/docs/cheatsheet/helpers/css using “Kirby 2.3.0 final”.
First I followed https://getkirby.com/docs/cheatsheet/options/css-handler but don’t got it working.
Afterwards I have found https://getkirby.com/docs/developer-guide/plugins/components#example, which leads me to running code, after I have found that the second param at https://getkirby.com/docs/developer-guide/plugins/components#register-a-component has to be written in lowercase!
Now I suggest to add badges with the Kirby versions (e.g. like “< 2.3.0”) to the old docs and the other way round like “2.3.0+” to the new docs, particularly at https://getkirby.com/docs/cheatsheet#options. A link to the new docs there would be great.
May be someone can add a comment at https://getkirby.com/docs/developer-guide/plugins/components#register-a-component that the second param (e.g. “css” in my case) needs to be in lowercase.