INTRO

Gradually Adopting Concurrent Features

Suspense in Data Frameworks

previous versions

• you can also use Suspense for code splitting on the client with React.lazy

Vision

• declarative Suspense fallback can handle any asynchronous operation
  • loading code, data, images, etc

What’s New in React 18

New Feature: Automatic Batching

• multiple state updates into a single re-render for better performance
• out-of-the-box performance improvement
  • removing manually batch updates

previous

• only batched updates inside React event handlers
  • Updates inside of promises, setTimeout, native event handlers, or any other event were not batched in React by default