Using a standard prefix for the CSS variables defined by this theme

[jorisvandenbossche]

From @bollwyvl in #273:

I still really recommend doing a CSS variable prefix, e.g. --pst-

(I think you mentioned that in the original PR that added the CSS variables as well, but at that point I didn't get what you meant ;))

That indeed sounds like a good idea (and good practice) to do.

[choldgraf]

100% - it would be great if we did this after the next release, because it'll take downstreams a while to re-adjust any CSS they might be over-riding

[jorisvandenbossche]

I don't fully understand the "after the next release" part. I was actually thinking: we need to do this before doing a release, because otherwise renaming those variables gives a breaking change for those who start to use them?

[jorisvandenbossche]

Ah, or maybe you were thinking about prefixing CSS classes we use in the templates / CSS? That's indeed also something we should clean-up, rationalize and standardize as well, for sure! (-> #37) But so here I was specifically talking about the variables ("properties"), which are new in master, and we can still change without breaking users (except if you were using master).

Now, for the classes, when we would rename them, I am not fully sure what the best workflow would be to change them that is easiest for downstream projects. Probably just a hard break and clear release notes / docs about it?

[choldgraf]

ahhh yes - you are correct, I was misunderstanding you...I meant classes :-)