What is React Fiber?

React Fiber is a complete rewrite of React's reconciliation algorithm. It is designed to

improve the rendering performance and make React more responsive and capable of

handling asynchronous rendering.

Key Features:

• Incremental Rendering: React Fiber allows rendering to be split into chunks, so it

can pause and resume work, improving responsiveness.

• Prioritization: React can assign different priority levels to updates (e.g., user input

vs. background updates).

• Async Rendering: Enables non-blocking UI updates, making React apps feel more

responsive.