useLayoutEffect VS useEffect | The Key Differences

Описание: #react #reacthooks #useeffect #useLayoutEffect #akcoding

Key Differences
Timing:
useEffect runs after the render is committed to the screen, allowing for non-blocking updates.
useLayoutEffect runs synchronously after the DOM updates but before the paint, allowing for immediate changes to the layout.
Performance:

useEffect is preferred for most side effects as it does not block painting, leading to smoother performance.
useLayoutEffect can cause performance issues if overused, as it blocks the paint operation, but is necessary for certain layout-related tasks.
Use Cases:

Use useEffect for general side effects like data fetching, subscriptions, and non-blocking DOM updates.
Use useLayoutEffect for side effects that require immediate DOM read/write operations to avoid layout shifts or visual flicker.