Node.js kya hai?

Node.js ek JavaScript runtime environment hai jo aapko server-side applications banane ki facility deta hai. Agar simple shabdon mein kahe, toh Node.js ki madad se aap JavaScript ko browser ke bahar, yani server par bhi run kar sakte ho.

Yahan main points hai jo aapko Node.js ke bare mein samajhne mein help karenge:

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1️⃣ JavaScript ka server-side use

• Normally JavaScript browser mein run hota hai.
• Node.js ke saath aap backend bhi likh sakte ho using JS.
• Matlab aap full-stack JavaScript developer ban sakte ho.

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2️⃣ Non-blocking / Asynchronous

• Node.js event-driven aur non-blocking I/O model use karta hai.
• Iska matlab hai ki server ek request process karte hue dusri request ko wait nahi karta, isse performance fast hoti hai.

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3️⃣ Built on Chrome V8 engine

• Node.js Google Chrome ke V8 JavaScript engine par based hai.
• Is engine ki wajah se JS code bahut fast run hota hai.

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4️⃣ NPM (Node Package Manager)

• Node.js ke saath aata hai NPM, jisme lakhon open-source packages available hai.
• Ye packages aapke development process ko bahut easy aur fast bana dete hain.

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5️⃣ Use Cases

• Web servers aur APIs banane ke liye (Express.js framework ke saath).
• Real-time applications jaise chat apps, gaming, live streaming.
• Backend services for mobile apps.
• Command-line tools.