Presence initial={false}

First-mount suppression. Initial paint is static; subsequent mounts animate.

Reload the page and watch the two columns. With <Presence initial={false}> the initial children appear instantly (painted at the animate target); without it they cascade in. Adding items mid-life animates the same in both.

initial={false}

instant first paint, animated thereafter

alpha
beta
gamma

initial (default true)

full cascade on first paint

alpha
beta
gamma