What Changes with React 19?

React 19 Important Innovations

Important changes are coming with React 19:

React Compiler

Performance increase is achieved with automatic optimization. There will be less need for manual useMemo and useCallback usage.

Server Components

SEO and performance improvements with server-side rendered components.

Actions

New action system for form operations:

function ContactForm() {
  async function submitForm(formData) {
    // Server action
    await saveContact(formData);
  }
  
  return (
    <form action={submitForm}>
      <input name="email" type="email" />
      <button type="submit">Submit</button>
    </form>
  );
}