YUI is a free, open source JavaScript and CSS framework for building richly interactive web applications. YUI is provided under a BSD license and is available on GitHub for forking and contribution.
Fast
YUI's lightweight core and modular architecture make it scalable, fast, and robust. Built by frontend engineers at Yahoo!, YUI powers the most popular websites in the world.
Complete
YUI's intuitive and well-documented API takes you from basic DOM handling to building performant and maintainable applications on desktop browsers, mobile devices, and servers.
Industrial Strength
A thriving community, a carefully architected infrastructure, and a comprehensive suite of tools help you code like a pro, from simple web pages to complex web applications.
Run
// Click the "Run" button to get started with YUI!
YUI().use('transition', function (Y) {
Y.one('#run-example').on('click', function (e) {
e.preventDefault();
Y.one('#example').hide('fadeOut', function () {
Y.one('#quick-start').show('fadeIn');
});
});
});
