JavaScript

The Language of the Web

JavaScript brings interactivity and logic to web pages, powering modern web applications.

Introduction

JavaScript is a lightweight, interpreted scripting language mainly used for web development. It is essential for making web pages interactive and dynamic.

History

JavaScript was created in 1995 by Brendan Eich at Netscape. Initially called LiveScript, it was renamed JavaScript and became a web standard.

Key Features

Lightweight and fast
Runs directly in browsers
Supports OOP, functional, and event-driven programming
Huge ecosystem (Node.js, frameworks)

Applications

Web development (front-end interactivity)
Backend servers (Node.js)
Mobile apps (React Native)
Game development

Advantages & Limitations

Advantages: Ubiquitous, flexible, massive community
Limitations: Can be insecure if misused, browser inconsistencies

Hello World Example

Output (Browser Console):

Hello, World!