website design - Does a tooltip require close button?

I'm working on tooltips, when I was told there are some tooltips that have close buttons. Is a tooltip with a close button user friendly?

Answer

To know if the tooltip should be closable by the user, we should know when it gets displayed.

• As a mouse-over: no, it is hidden, when the user moves away.


• On some event: How would it get closed otherwise? Time is not a good option as it would a break accessibility guidelines.


• Click in text line: Not necessary, but I would provide this option as stackexchange is doing it. Users like to have control.

In general I would provide a close button. Usually it doesn't destroy a design but most people will like it.