How do I make a cooldown on a firework? As it is not a command I dont think the "commands-cooldown" works for this

What I want to happen: The player can send 1 firework ever 1 seconds.
What happens: the player can spam as many fireworks as he likes.

https://pastebin.com/0fxx2q2k is my items.yml for the firework

There is currently no feature that allows you to modify the usage of an item's default abilities (vanilla minecraft). I will look into trying to add this, I am not sure how long it will take though as I am pretty sure I will not be able to implement this using an already created structure in ItemJoin, it will end up becoming a new code structure in and of itself.

I have added this to the latest snapshot and will be available when v4.6 is released, It is an option you can put on an item called use-cooldown. The time is calculated in seconds.

Example;
use-cooldown: 3

The example shown was a 3 second cooldown and the players will have to wait 3 seconds to use the item again.

This functions almost exactly the same as command cooldowns. This is just simply a cooldown for the "use" of items. You could even limit the speed that players could place items xD

Added as of ItemJoin v4.6 and it has been released!
Get it here; https://www.spigotmc.org/resources/itemjoin.12661/download?version=202495

Please read the changelog as the documentation has not been updated yet; https://www.spigotmc.org/wiki/recent-changes