I was just responding to the usage that the parent commenter had which was

>As I understand it, React was an attempt to shoehorn "immediate-mode UI"[1] on top of retained-mode UI

which I interpreted as the only possible meaning, in relation to React, being UI components that must rerender as close to immediately as possible vs. UI components that do not need immediate rerendering when the underlying data has changed.

I realize that is not a particularly correct use of the phrases, but then that is what happens when you use a concept from one type of development metaphorically in another type of development, memetic slippage as it were.