React 19: Server Actions, useOptimistic ve React Compiler

async function savePost(formData) {

    'use server';

    await db.posts.create({data:{title:formData.get('title')}});

    revalidatePath('/posts');

}

export function PostForm() {

    return <form action={savePost}>

        <input name="title"/><button>Kaydet</button></form>;

}

const [opt,addOpt]=useOptimistic(likes,(s,v)=>[...s,v]);

• useMemo/useCallback otomatik
  
• %40 az re-render
  
[*]Server Components stabil