React mein Virtual DOM ek core concept hai jo performance ko improve karne aur efficient UI updates ko facilitate karne ke liye use hota hai.
Jab aap kisi React application mein changes karte hain, React pehle ek virtual representation ya structure create karta hai jo actual DOM ke saath compare kiya ja sakta hai. Ye virtual representation Virtual DOM ke roop mein jaana jaata hai.
Jab koi state change hoti hai ya component update hota hai, React pehle virtual DOM mein changes apply karta hai. Phir, virtual DOM aur actual DOM ke beech mein difference calculate kiya jata hai (diffing process). Finally, sirf actual DOM mein un changes ko apply kiya jata hai jo virtual DOM mein reflect hote hain.
Virtual DOM ka upyog karke, React performance improve karta hai kyunki sirf actual DOM mein jaruri updates hi apply kiye jate hain, jisse unnecessary DOM manipulation aur re-rendering se bacha jata hai. Isse web applications ko smooth aur responsive banane mein madad milti hai.
