---

name: react description: React development best practices and patterns, including modern data fetching with React 19.

React Development

Modern React development patterns and best practices.

Data Fetching

Use React 19's use hook with Suspense for data fetching. Don't use useEffect for fetching data.

Basic Data Fetching

Copyimport { use } from "react";

const fetchUsers = fetch('/api/users').then(res => {
  if (!res.ok) {
    throw new Error(`HTTP error! status: ${res.status}`);
  }
  return res.json();
});

export function Users() {
  const users = use(fetchUsers);
  return (
    <ul>
      {users.map(user => <li key={user.id}>{user.name}</li>)}
    </ul>
  );
}

Loading States with Suspense

Wrap components with Suspense for loading states:

Copyimport { Suspense } from "react";
import { Users } from "./pages/Users";

export function App() {
  return (
    <Suspense fallback={<div>Loading...</div>}>
      <Users />
    </Suspense>
  );
}

Guidelines

• Use the use hook for data fetching instead of useEffect
• Always wrap data-fetching components with Suspense boundaries
• Handle errors properly in your fetch promises
• Prefer declarative data fetching patterns over imperative ones