Please could you explain how to set container and boundariesElement properties?

[Redrica]

container - Selector: Container where the tooltip will be appended (e.g. 'body').
boundariesElement - DOM element for the tooltip boundaries.

what kind of selector I need?
I tried to use a classname there but it didnt work.
I have a set of cards with tooltips in them and I want to place tooltips' element inside a card instead of body.
and the same question about boundariesElement.

Thanks in advance!

[luispittagros]

I think you must do something like

const boundariesElement =  document.querySelector('#boundariesElementl');