Signals in React (III): Lifecycle Never Disappeared

This article explores how React's lifecycle was never removed but restructured into Render and Commit phases, and compares this with the signals approach that uses an explicit dependency graph. It establishes clear responsibility separation: UI side effects belong to React hooks (useLayoutEffect/useEffect), while data-flow side effects belong to signals (createEffect), and render must remain pure with no signal writes. The two systems operate independently without conflict, each managing lifecycle boundaries at different abstraction layers.