[Popover] Could we switch off `initialFocus`?

[sebinsua]

Feature request

Summary

I've noticed that Popover has an initialFocus prop that can take a ref or function returning a ref. By default it focuses the popup.

I'd like to be able to switch off initial focus.

Note, I've tried to pass in the background element that I need to keep focus but it doesn't seem to work.

Examples in other libraries

floating-ui#FloatingFocusManager supports a negative number to ignore the initialFocus therefore, I am actually able to pass in -1 into Popover and it'll do as expected but I will get a type error.

Motivation

I sometimes use this component to display transient flyouts that show information (and only gain focus if you interact with them). I need another element on the page to maintain its focus because it reacts to keyboard shortcuts.

[atomiks]

The -1 workaround (and casting/silencing the error) doesn't seem to work properly when tabbing. Focus should be moved into the popup, but it closes instead, unless there's a focusable/tabbable element inside of it. (If there isn't, it should focus the popup container itself). This seems to be a bug caused by tabindex=0 not being assigned onto the popup by Floating UI (it has -1 instead of 0) when there's no tabbable/focusable children.

You can set tabIndex={0} manually in this case: https://codesandbox.io/p/sandbox/bold-farrell-xdj8s5?file=%2Fsrc%2FApp.tsx%3A3%2C41

[sebinsua]

@atomiks Will my current workaround of passing in initialFocus={-1) so that the original background element is still focused continue to work after this change?

We have a couple of unusual components in our app. The one I'm describing above is kind of like a 'Toast' component that notifies the user of changes they're making via keyboard shortcuts. And the keyboard shortcuts are only available when a particular section of the app is focused. I'm not expecting a 'flyout' notification to seize focus unless we interact with controls within it.

There may be other ways for me to workaround the problem, too.