pub fn use_previous<T>() -> Previous<T>Expand description
Obtains the previous-value tracker registered against the current hook context slot.
Behaves like HookContext::use_hook: the same Previous is
returned on every render at the same hook index, so the captured
previous signal survives across renders without losing state.
ยงReturns
Previous<T>- The previous-value tracker handle. Returns the factory result directly when no hook context is active (e.g. when called outside a render cycle).