Boss bar is visible
Whether a boss bar is switched on, whoever it is shown to.
A Minecraft element (a check) in Scoreboards & teams. Needs the Basic plan or higher to go live; building and testing are free.
Example
When a player uses a command → If Boss bar is visible event → Answer: It is on.
Also called
bar on, bar hidden, bar visible
Works as a data pack?
No. This one needs the Elementium plugin on a Paper server.
What you give it
- Bar