Async Filtering for Combobox

[mathis-m]

Use Async Combobox Filter

An example generic implementation for Combobox component to support filtering in the backend.

The main motivation on this is that there is no OOTB implementation for an async search with result list component. I do not want to implement all magic again that is why I opted to use the Combobox component as base.

While implementing this I found some weird behaviours of the Combobox component, e.g.
// clear selection for single-select if the input value no longer matches the selection
Or resizing the combobox according to it's content (see example inline tags).

This is the initial implemation and may still miss some things.

Playground: https://stackblitz.com/edit/qxuhm6?file=src%2Fexample.tsx

Would be great if fluentui had OOTB support for async combobox.

Are there any plans to provide a component that works with asynchronous use cases of searching and making results selectable?

Cheers