JavaScript Essentials

Last updated: 2025-09-25 02:02:49

JavaScript Programming

JavaScript is a versatile programming language for web development.

Variables

let name = "John";
const age = 25;
var city = "New York";

Functions

// Function Declaration
function greet(name) {
    return `Hello, ${name}!`;
}

// Arrow Function
const add = (a, b) => a + b;

DOM Manipulation

// Select elements
const element = document.getElementById("myId");
const elements = document.querySelectorAll(".myClass");

// Modify content
element.textContent = "New text";
element.innerHTML = "<strong>Bold text</strong>";

Event Handling

button.addEventListener("click", function() {
    console.log("Button clicked!");
});