Hello,
I found so many problems integrating carousel with vaadin 8; AbstractComponentContainerState has been introduced in v8 and this produce classCastException since CarouselState isn’t AbstractComponentContainerState however AbstractCoarousel is AbstractComponentContainer.
Considering that https://github.com/tomivirkki/carousel/issues/10 has been there for quite a while I would not expect for V8 support coming any time soon. Already V7 was somehow troubled due to the Xtend-GWT-integration.