Add PopoverRef type

[dklymenk]

Overview

Popover supports a ref prop that doesn't seem to be documented or typed.

Here is a codesandbox that showcases the ref actually working at run time, but with type errors. This PR addresses those errors by:

• introducing a PopoverRef type that has the signatures for open and close methods
• adding an optional ref prop to PopoverProps

I also tweaked the definition for childred prop. Specifically, the getRef prop passed to children to use the new PopoverRef instead of the generic HTMLElement.

Since the type definition for select menu relies on PopoverProps, I added the ref to the list of omitted properties as that component doesn't actually have any ref-related functionality.

The changes can be tested by trying to pass a ref created by useRef<PopoverRef> and making sure there are no type errors related to calling open or close.

Documentation

• Updated Typescript types and/or component PropTypes
• Added / modified component docs
• Added / modified Storybook stories

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