--transition-duration-* supported but not documented

[aparajita]

I added this to my @theme section:

--transition-duration-std: var(--p-transition-duration);

The corresponding duration-std class was correctly created by Tailwind:

.duration-std {
    --tw-duration: var(--transition-duration-std) /* var(--p-transition-duration) */;
    transition-duration: var(--transition-duration-std) /* var(--p-transition-duration) */;
}
@property --tw-duration {
    syntax: "*";
    inherits: false;
}

This leads me to believe that --transition-duration-* IS a supported theme variable namespace, but it is not listed in the relevant docs.

[adamwathan]

Hey! This is intentional at the moment anyways, there are a ton of namespaces like this that we support for backwards compatibility but haven't documented to push people towards simpler usage of the framework. Totally fine to use them though, won't stop working or anything. If this particular one comes up a lot we can definitely consider documenting it, I don't think it's an unreasonable one since people might want to use less literal names like duration-short which could map to different values in different projects.

[aparajita]

If for no other reason than completeness it's nice to have. Having semantic duration names is a big plus.