Hello dosto! Aaj hum baat karne wale hain 'Callback Function' ke baare mein, jo JavaScript mein asynchronous programming ka ek important concept hai.
Callback function aisa function hai jo kisi doosre function ke argument ke roop mein pass kiya jata hai aur jab wo doosra function apna kaam complete kar leta hai, tab callback function ko call kiya jata hai. Yeh approach asynchronous code ko handle karne mein madad karta hai.
Example ke liye, maan lijiye hume ek API se data fetch karna hai. Hum ek function likhte hain jo API call karta hai, aur jab data aata hai, tab hum callback function ko invoke karte hain jisse data process ho sake. Yeh hume ensure karta hai ki humara code sequentially execute ho raha hai bina kisi blocking ke.
Iska ek important use case hota hai event handling mein. Jab koi user kisi button par click karta hai, tab us event ko handle karne ke liye hum ek callback function specify karte hain.
Callback functions powerful hain, lekin inka ek downside bhi hai - jab aap bahut saare callbacks nest karte hain, to code 'Callback Hell' mein chala jata hai, jo code ko samajhna aur maintain karna mushkil kar deta hai.
Isliye, agar aapko complex asynchronous operations handle karne hain, to aap Promises ya Async/Await ka istemal kar sakte hain.
Toh yeh tha Callback Function ka chhota sa introduction! Aise aur tech concepts ke liye channel ko subscribe karein! Milte hain next video mein. Dhanyawad!
