Spell ID for action cooldown
 

After using an ability the entire action bar "clocks" for close to one second. I was wanting to know if anyone knows the spell ID (if that's correct) for this waiting period.

That sounds like the global cooldown. I don't know if there is a specific spell ID for that.

If I recall the code correctly, nUI simply checks the standard cooldown for the spell and deducts 2 seconds for the GCD. Whatever is left becomes the cooldown value.

Hopefully someone can confirm one way or another.

Found something: https://www.wowhead.com/spell=61304/global-cooldown

ID would be 61304 (you can probably tell anyhow). WoW servers are being restarted at the moment, just excited to share a possible answer. Will update in a hour (9:19 am central right now).

The Whole Point
 

I got the GCD event to activate Bartender 4 as STATUS trigger type using the Global Cooldown status variable. I wanted a bar to show GCD as I'm activating abilities between castings. It works. It's the green left to right ticker bar:

https://imgur.com/0fPEeUi

The GCD has a base time of 1.5 seconds (not 2), which can be lessened by talents/abilities or haste. Not all spells/abilities trigger the GCD.

Thanks for refining this. I knew it was short and not on all spells but not having written nUI myself I don't know precisely what it does but a deduction of 2 rings a bell so Scott may have round it up. And used the cooldown functionality to do the rest including not show a cooldown if one isn't needed.