React 19 New Features Explained with Examples

React 19 is here, and it’s one of the most feature-packed releases in recent years. In this blog, we’ll break down the most exciting features and show you practical code examples so you can start using them today.

⚡ 1. New use Hook

React 19 introduces the use hook to simplify working with promises, async functions, and contexts directly in components.

import { use } from "react";

function UserProfile() {
  const user = use(fetchUser()); // directly awaits promise
  return <h2>Hello, {user.name}</h2>;
}

This removes boilerplate around useEffect + useState.

⚡ 2. Improved Server Components

React Server Components are now more stable and integrated into the React ecosystem.
You can now mix server and client components seamlessly.

// Server Component
export default async function ProductList() {
  const products = await fetchProducts();
  return (
    <ul>
      {products.map(p => <li key={p.id}>{p.name}</li>)}
    </ul>
  );
}

⚡ 3. Actions API

A new way to handle forms and async mutations with less code.

"use client";

import { useActionState } from "react";

function ContactForm() {
  const [state, action] = useActionState(async (formData) => {
    await sendMessage(formData);
    return "Message sent!";
  }, "");

  return (
    <form action={action}>
      <input name="message" />
      <button type="submit">Send</button>
      <p>{state}</p>
    </form>
  );
}

⚡ 4. Better Document Metadata

You can now define

, , and tags inside React components using the new Metadata API.

import { Metadata } from "react";

export const metadata: Metadata = {
  title: "My React 19 App",
  description: "Exploring new features in React 19",
};

⚡ 5. Smaller & Faster

React 19 focuses on:

• Smaller bundle size
• Faster rendering with improved concurrent features
• Better dev tooling and error reporting

✅ Final Thoughts

React 19 makes async handling, server integration, and forms much easier.
If you’re starting a new project, upgrading will give you access to these productivity boosts right away.