Introduction

JavaScript is a programming language used to make web pages interactive. It can update and change both HTML and CSS, and it can calculate, manipulate, and validate data.

Features of JavaScript

• Lightweight and Interpreted:JavaScript runs in the browser without needing compilation, making it efficient for web interactions.

• Dynamic Typing:Variables in JavaScript do not need explicit data type declarations, offering flexibility.

• Prototype-based:JavaScript allows objects to be extended dynamically, enabling versatile object structures.

• Event-Driven:JavaScript responds to user actions like clicks, input, etc., making it interactive.

How JavaScript Works

• Input:You write JavaScript code in your HTML or as a separate file.

• Processing:The browser interprets and executes the JavaScript code line by line.

• Output:JavaScript manipulates the web page or performs a task based on the code.

Benefits of Using JavaScript

• Cross-platform compatibility:JavaScript works across all major browsers and platforms.

• Client-side execution:JavaScript runs directly in the user's browser, reducing server load.

• Rich interfaces:It allows for the creation of interactive and dynamic user interfaces.

• Widely supported:JavaScript is supported by all modern browsers without the need for plugins.

Example

• User: 'What is JavaScript?'

• JavaScript is a scripting language used to create dynamic content on websites.

Activity

• Create a simple HTML page and write a JavaScript function that displays an alert box with a message when a button is clicked.

Quiz