Showing arrow on dropdown, like a tooltip does

[Ericlm]

Hello, I'm looking for a way to show an arrow from a dropdown menu to the dropdown toggle, just like tooltips do. That is, the following, but for a dropdown:

I guess the best way is to pass custom popper options via the props popper-opts of the b-dropdown. However, I don't know anything about Popper JS, and I don't know how to achieve what I want.

[sidneygijzen]

One way would be a CSS triangle on a HTML pseudo element, e.g dropdown-menu:before or dropdown-menu:after. See this page for some examples.