React 19 Patterns and Best Practices

Modern React 19 patterns leveraging the React Compiler, Server Actions, and new hooks.

Compiler-Friendly Code

The React Compiler automatically optimizes components for performance. Write code that works well with it:

Best Practices:

• Keep components pure and props serializable
• Derive values during render (don't stash in refs unnecessarily)
• Keep event handlers inline unless they close over large mutable objects
• Verify compiler is working (DevTools ✨ badge)
• Opt-out problematic components with "use no memo" while refactoring