> From my perspective, declarative is the best way to describe UI I agree. It seems like we have some good solutions for declaratively describing the structur

> From my perspective, declarative is the best way to describe UI I agree. It seems like we have some good solutions for declaratively describing the structure and static appearance of UIs - but beyond things like transition animations, we don't have anything that satisfactorily describes their behaviour. Its a hard problem nut I sometimes wonder why this aspect is under-served by the technologies we have.