api._popperElement is undefined

[urbany]

Hi, seems like there is a problem with the latest 0.10.0 release.

On my app, I always get that api._popperElement is undefined. I think this is because the API tries to get the _popperElement computed property before it returns.

1. the REF modifier sets the computed prop _popperElement in ember-popper-base.
2. Before that set returns, _updatePopperis called
3. at the end of _updatePopper, registerAPI is called with _getPublicAPI
4. Inside _getPublicAPI you are calling _getPopperElement which returns _popperElement.
5. Since the SET of _popperElement (point 1 abose) hasn't returned yet, it is still null.

Tested on [email protected] or even @3.9.