Node.js ke features kya hai?

Node.js ke kuch important features hai jo use itna popular banate hain, main simple aur clear points mein explain karta hoon:

1️⃣ Asynchronous and Event-Driven

• Node.js ka main feature hai non-blocking I/O.
• Matlab server ek request process karte hue dusri request ka wait nahi karta.
• Ye event-driven architecture use karta hai, jaise “event listener” ki tarah, har request ka response alag handle hota hai.

Example:

const fs = require('fs');

fs.readFile('file.txt', (err, data) => {
    if(err) throw err;
    console.log(data.toString());
});
console.log('File read started...');

const fs = require('fs');

fs.readFile('file.txt', (err, data) => {
    if(err) throw err;
    console.log(data.toString());
});
console.log('File read started...');

Output:

File read started...
(contents of file)

File read started...
(contents of file)

• File read started... pehle print hota hai because Node.js asynchronous hai.

2️⃣ Single-Threaded but Highly Scalable

• Node.js single-threaded hai, matlab ek hi thread use karta hai.
• Lekin event loop aur non-blocking I/O ki wajah se multiple requests efficiently handle kar sakta hai.

3️⃣ Fast Execution

• Node.js V8 JavaScript engine use karta hai jo Chrome ka engine hai.
• Ye JS code ko machine code mein convert karta hai, isliye execution bahut fast hota hai.

4️⃣ Cross-Platform

• Node.js Windows, MacOS, Linux sab par run hota hai.
• Matlab aap same code different OS par use kar sakte ho.

5️⃣ NPM (Node Package Manager)

• Node.js ke saath aata hai NPM, jo duniya ka largest package ecosystem hai.
• Libraries aur modules easily install karke development fast hoti hai.

6️⃣ No Buffering

• Node.js applications data ko chunks mein process karte hain, na ki ek baar mein.
• Ye streaming applications (video, audio) ke liye best hai.

7️⃣ Highly Extensible

• Node.js microservices architecture aur modular development ke liye suitable hai.
• Small modules ya packages ko integrate karke large applications easily build kiye ja sakte hain.