React/Vuejs components are declarative UI at their core. That idea tends to get lost in the soup that is state management, but it is there. The easiest-to-inte

React/Vuejs components are declarative UI at their core. That idea tends to get lost in the soup that is state management, but it is there. The easiest-to-integrate React/Vuejs components are very close to purely declarative, in my experience.