JavaScript (JS): The Language of Interactive Web Pages

JavaScript (JS) is a programming language used to create interactive and dynamic web pages. It's a client-side scripting language that runs in the browser, meaning it executes on the user's computer rather than on a web server.

JS is used for a variety of purposes on the web, including:

1. Adding interactivity to web pages, such as drop-down menus, slide shows, and pop-up windows.
2. Validating user input in web forms, ensuring that data is entered correctly and matches specific criteria.
3. Creating animations and effects, such as parallax scrolling and hover effects.
4. Building web applications, such as online games, chat rooms, and productivity tools.
5. Integrating with other web technologies, such as APIs and databases, to create more robust and dynamic web applications.

Some popular frameworks and libraries for JavaScript include React, Angular, Vue, and jQuery.