The goal of React Fiber is to increase its suitability for areas like animation, layout, and gestures. Its headline feature is incremental rendering: the ability to split rendering work into chunks and spread it out over multiple frames.
Its main goals are:
- Incremental Rendering – Breaks work into chunks for smoother updates.
- Interruptible Rendering – Pauses and resumes rendering to keep the UI responsive.
- Prioritization – Handles high-priority updates (e.g. animations) before low-priority ones.
- Concurrency Support – Enables working on multiple UI versions simultaneously.
- Better Error Handling – Supports component-level error boundaries.
- Suspense Support – Allows waiting for async data before rendering.
- Improved DevTools – Enables better debugging and performance tracking.