How to make such a tooltip to the block (with animation)?

Question

css

How to make such arrows from the block? Perhaps there are ready-made solutions with animation?
The chart is built using chart js, although it doesn't matter

Answer 1

I don’t pretend to quality, it’s not there :D
but I dug around for half an hour
on the topic, I didn’t see such ready-made garbage, but I hope I gave you an idea, the implementation is crooked, but it happens when there is no way out, but it’s necessary)