consider adding some version of useLayoutEffect

[sdegueldre]

Sometimes you want to measure some DOM element and then immediately rerender and patch the DOM with a different. Currently, doing this in useEffect causes flickering since any rendering scheduled in useEffect will only be patched on the next animation frame, cause the incorrect state to be briefly painted by the browser. Consider adding a way to schedule a synchronous re-render and patch.

[ged-odoo]

i guess it can be done, however, the question has to be asked, what if we have async sub components?

to that, the first answer that comes to mind is to raise an error and limit the use of such a hook to cases where we have a sync component with only sync children.