Empty slot for image component should be styleable

[bcardarella]

I may be incorrect in my approach, but I want to to set the frame for the loading state of an AsyncImage. I went to add a style to the :empty slot on the <.image/> component but it didn't exist. I can add it myself but I'm curious if this is the correct approach.

My motivation is the pokemon battle app and when I jam the Vote button rapidly I get UI jank when one of the images doesn't load fast enough. I was hoping to set the loading state's frame to the same size as the sucess image to prevent the jank.

[carson-katri]

There is an empty slot, but it doesn't have a style option. Instead, you have to provide the empty state View and style that:

<.image url="...">
  <:empty>
    <ProgressView style="frame(width: 100, height: 100);" />
  </:empty>
</.image>