Managing code complexity using Shiny Modules. As Shiny apps grow larger and more complex, the code in your ui.R and server.R files can grow unwieldy. Larger apps may span multiple tabs and sprout dozens of inputs and outputs, making it a challenge to keep track of what is going on. Help is on the way, in the form of an upcoming Shiny feature called “modules”. This webinar will introduce you to Shiny modules, and teach you how to use them to start taming your app code.