XF 1.4 xen:hook in Extra.css

Good evening,
I am wondering how I would add a hook for a specific template from Extra.css, if it's CSS I can do:
.template {
   css: xx;
How would I do if I would like to include a <xen:hook ..> into this ".template"?

Thank you.


Well-known member
xen:hook is deprecated.
There won't be any new hooks and existing hooks may be removed in a future version.

You should use template modifications.