⚡ JavaScript

📖 What is JavaScript?

JavaScript என்பது Web Pages-க்கு Logic மற்றும் Interactivity வழங்கும் Programming Language ஆகும்.

🎯 Why JavaScript?

✔ Interactive Websites

✔ Dynamic Content

✔ Form Validation

✔ API Integration

✔ Web Applications

🏗 Basic Syntax

let name = "VelviHub";

console.log(name);

📦 Variables

var name = "Raj";

let age = 25;

const pi = 3.14;

🔀 Conditions

if(age >= 18){
console.log("Adult");
}

🔄 Loops

for(let i=1;i<=5;i++){
console.log(i);
}

⚙ Functions

function welcome(){
alert("Welcome");
}

🖱 Events

button.onclick = function(){
alert("Clicked");
}

🌐 DOM Manipulation

document.getElementById("demo")
.innerHTML="Hello";

📡 API Example

fetch("data.json")
.then(response=>response.json())
.then(data=>console.log(data));

🌍 Real World Usage

✔ Websites

✔ Dashboards

✔ Mobile Apps

✔ Web Applications

✔ Automation Tools

🎤 Interview Questions

What is JavaScript?

Difference between var, let and const?

What is DOM?

What is an Event?

What is a Function?

What is Fetch API?

What is JSON?

Difference between Java and JavaScript?

📝 Summary

JavaScript என்பது Modern Web Development-ன் முக்கிய Programming Language ஆகும்.

Interactive Websites மற்றும் Web Applications உருவாக்க JavaScript அவசியமானது.

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