✅ JavaScript Basics You Should Know 🌐✨

JavaScript is a scripting language used to make websites interactive handling user actions, animations, and dynamic content.

1️⃣ Variables & Data Types 
Use let for reassignable variables, const for constants (avoid var due to scoping issues).

let name = "Alex";  
const age = 25;

Data Types: string, number, boolean, object, array, null, undefined.

2️⃣ Functions 
Reusable blocks of code.

function greet(user) {
  return `Hello, ${user}`;
}

Or use arrow functions for concise syntax:

const greet = (user) => `Hello, ${user}`;

3️⃣ Conditionals

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

4️⃣ Loops

for (let i = 0; i < 5; i++) {
  console.log(i);
}

5️⃣ Arrays & Objects

let fruits = ["apple", "banana"];
let person = { name: "John", age: 30 };

6️⃣ DOM Manipulation

document.getElementById("demo").textContent = "Updated!";

7️⃣ Event Listeners

button.addEventListener("click", () => alert("Clicked!"));

8️⃣ Fetch API (Async)

fetch("https://api.example.com").then(res => res.json()).then(data => console.log(data));

9️⃣ ES6 Features
⦁ let, const
⦁ Arrow functions
⦁ Template literals: Hello ${name}
⦁ Destructuring: const { name } = person;
⦁ Spread/rest operators: ...fruits

💡 Tip: Practice JS in browser console or use online editors like JSFiddle / CodePen.

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