uilang is a dead simple programming language for web designers. With uilang, you write your code just like plain English, straight into your HTML using a <code> element. uilang’s logic relies on manipulating classes on HTML elements and using these classes in CSS to show, hide, animate and transform elements when a click occurs. This simple logic lets designers create most of the typical user interface behaviours: tabs, popovers, overlays, sliding menus, etc.