Understanding why action buttons in Shiny don't work, when using several of them
问题 Why when I put together several action button codes from Shiny manual (https://shiny.rstudio.com/articles/action-buttons.html), it DOES NOT run (i.e. no button reacts) ? Each code separately runs fine. How to fix it? (This is relates to this post: Convert Shiny App R code to Rmarkdown Shiny App code: with observeEvent and eventReactive) # Code from https://shiny.rstudio.com/articles/action-buttons.html library(shiny) ui <- fluidPage( # Pattern 1 - Command tags$head(tags$script(src = "message