Declarative way to handle feature state

[bernatfortet]

Hi! I'm looking for good declarative ways to handle feature state.

So far I've been handling featureState with a very convoluted hook.

• It listens for changes interactiveLayerIds
• It listens for onMouseEnter, over, out, click on the map. And whenever an event is triggered it checks if event is fired on an interactive layer
• Then it it applies hover and selected states to the feature with interaction.

It kind of works, but it's complex and hard to manipulate.

It would be fantastic to have a more declarative way like this:

<Source id='holes' type='geojson' data={fc as any} promoteId='number'>
  <Layer
    id='holes-fill'
    type='fill' ...
    onHover={...} 
    onClick={...}
  />
 ...