Modern React Patterns: Concurrent Rendering & Actions with Aurora Sharff

Aurora Scharff, Senior Consultant at Crayon, joins to break down how modern React development is evolving with features from React 18 and React 19.

She explores real-world use cases for useTransition and useOptimistic, highlights improvements in async UI rendering and performance, and shares insights on building responsive interfaces with concurrent rendering patterns.

The conversation also touches on server components, Next.js, and tools like Aria Kit and Redwood SDK, all shaping the next era of React development.

Links

Website: https://aurorascharff.no
Github: https://github.com/aurorascharff
X: https://x.com/aurorascharff
Bluesky: https://bsky.app/profile/aurorascharff.no
LinkedIn: https://www.linkedin.com/in/aurora-scharff-a86b88188

Resources

Building Reusable Components with React19 Actions: https://aurorascharff.no/posts/building-reusable-components-with-react19-actions

Chapters

00:00 Intro
00:18 Modern React concurrent rendering patterns explained
03:38 useTransition real-world examples
08:22 useOptimistic for faster UI feedback
30:10 React Server Components and Next.js integration
30:57 Building modern UIs with Aria Kit
34:07 Using Redwood SDK in the React ecosystem
39:00 Key takeaways and what’s next for React development

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