Keep Interactive Content Out of Hover Tooltips
NEVER: Put interactive content inside a hover tooltip — the tooltip unmounts as the pointer leaves the trigger and its controls never enter the tab order. If it has something to press, make it a click-triggered popover/dialog with `aria-haspopup`, focus movement and Escape dismiss.
Never put links, buttons or inputs inside a tooltip that is triggered by hover
Bad
Good
Why it matters
A hover tooltip is tied to the pointer being over its trigger: the moment the pointer travels toward the tooltip it leaves the trigger and the tooltip unmounts, so the control inside can never be clicked. It is worse for keyboard users — the tooltip is only rendered while hovered, so its button never exists in the tab order, and `role="tooltip"` content is not treated as a focus container anyway.
If the content has something to press, it is a popover or a dialog: give it a click trigger, `aria-haspopup`, focus movement on open and an Escape dismiss. Otherwise inline the action next to the trigger.