Yahoo! User Interface Library

The Yahoo! User Interface (YUI) Library is a collection of JavaScript tools and code that helps developers build more interactive, responsive, and consistent websites. It provides pre-made components like sliders, menus, and tabs, along with functions for tasks such as handling data and enhancing user experience. Essentially, YUI simplifies the complexity of creating dynamic web pages, making it easier and faster for developers to add advanced features without starting from scratch. It promotes organized coding, reducing errors and improving website performance.