What is useLayoutEffect, and how is it different from useEffect?

`useLayoutEffect` runs synchronously right after all DOM changes, which makes it perfect for tasks that need access to the DOM before any visual updates occur, like measuring element size or position. On the other hand, `useEffect` runs asynchronously after the browser has finished painting changes, making it ideal for non-blocking tasks such as fetching data or subscribing to events.

How it is different from useEffect?

• Timing of Execution: useLayoutEffect executes synchronously after all DOM mutations, before the browser has a chance to paint any changes, while useEffect executes asynchronously after the browser has painted changes.
• Use Case: useLayoutEffect is suitable for operations that require immediate access to the DOM, such as measuring DOM elements or performing layout calculations, while useEffect is typically used for side effects that do not require immediate DOM manipulation, such as data fetching or event subscriptions.
• Potential Performance Impact: Since useLayoutEffect runs synchronously and can potentially block the browser’s rendering process, it may cause performance issues if not used carefully. On the other hand, useEffect runs asynchronously and does not block rendering, making it safer for most side effects.
• Considerations: While useLayoutEffect can provide more accurate measurements and calculations due to its synchronous nature, it should be used sparingly and only when necessary to avoid blocking the main thread and causing jank in the user interface. useEffect is generally the safer choice for most side effects in React components.
• Server-side Rendering (SSR) Considerations: When working with server-side rendering (SSR) in React, useLayoutEffect can cause hydration mismatches because it runs both on the server and the client. In contrast, useEffect does not cause such issues because it runs asynchronously on the client side after hydration is complete.
• Re-renders: Components using useLayoutEffect may re-render synchronously if the effect changes the state or props of the component. This can lead to more frequent re-renders compared to using useEffect, which executes asynchronously after rendering is complete.

useLayoutEffect is similar to useEffect, but it runs synchronously before the browser paints any changes, whereas useEffect runs asynchronously after the browser has painted changes. Use useLayoutEffect when you need to perform operations that require immediate access to the DOM, and use useEffect for most other side effects.