React 19 is Here: What’s New & What’s 🔥

Hey Devs 👋

React 19 is officially out, and it’s packed with new tricks that make life smoother, cleaner, and faster! Let’s quickly zoom through what’s hot and what’s changed.

---

🚀 Top Features in React 19

1. React Compiler (aka React Forget)

No more useCallback, useMemo everywhere? YES PLEASE. React 19 introduces an optimizing compiler that tracks re-renders and reuses logic smartly.

Before:

const memoizedFn = useCallback(() => doSomething(), [])

Now:

function handleClick() {
  doSomething()
} // It just works

2. Actions – Async Form Handling!

Forms are now easier to handle with the new useFormStatus and useFormState APIs.

const action = async (formData) => {
  'use server'
  await saveToDB(formData)
}

✅ Supports optimistic updates ✅ Server-first logic

3. use() Hook – Await inside Components

You can now await inside your components with use()

const data = use(fetchUser())

No more wrapping everything in useEffect+state.

---

📊 Quick Comparison

Feature	React 18	React 19
Async Handling	useEffect + state	use() and Actions
Memoization	Manual (useMemo/useCallback)	Auto via Compiler
Form Handling	HTML or libraries	Built-in Actions + useFormState
Server Components	Experimental	First-class

---

🔧 React 19 Setup Tip

Want to use new features?

npm install react@canary react-dom@canary

Or wait for the stable release in create-react-app and Next.js

---

🧪 Try it Out

Live playground for actions and use() — React Playground

---

That’s all folks!

React 19 is all about making code declarative, server-aware, and less boilerplate-y ✨

Stay tuned and go build cool stuff 🛠️💙