Expand/Collapse Shiny selectInput function
问题 I would like to find a resource that would allow my Shiny selectInput function to expand/collapse based on the category headings that I have created. I have searched through some bootstrap resources, but am not yet successful. Please forgive my minimal working example, I acknowledge that there may be more efficient ways to provide a MWE. Thanks for any advice you can offer. library(shiny) library(tidyverse) #create a quick dataset to plot schools <- as.data.frame(table( c('Adams', 'Van Buren'