Add Loader for Shiny R

This tutorial covers how you can add beautiful loader in R shiny app. It includes 10 types of CSS animated loaders and animated image (GIF) which you can include in your app for better user experience. You must have seen Welcome Screen when Windows 10 starts. There is a circle shaped loader which appears in Windows Screen when windows loads. It stays visible until the content or task is completed. It is very useful when you want to tell user that processing is going on behind the screen and it will be completed very soon. It is used when calculation in your dashboard is computationally intensive and it takes some time to process it. Suppose you are showing some data in a table or graph. It takes a few seconds to build the table or graph. In that case, you can show animated loader during waiting time. In R, there is a package named shinycssloaders which has various kinds of loaders along with options to customize size and color. See the different types in the GIF shown below.