Documenting id argument to accordion in shiny apps

[chrisbrownlie]

It seems to be the case that the id argument to accordion is required when using it in a {shiny} app, but this wasn't clear from any documentation I could find.

For example, I would have expected the below to work, but it gives an error:

library(shiny)
library(bslib)

ui <- fluidPage(
  theme = bs_theme(version = 5),
  uiOutput("my_accordion")
)

server <- function(input, output, session) {
  output$my_accordion <- renderUI({
    
    # This code taken from help docs
    items <- lapply(LETTERS, function(x) {
      accordion_panel(paste("Section", x), paste("Some narrative for section", x))
    })
    accordion(
      !!!items
    )
    
  })
}

shinyApp(ui, server)

Adding any id to the accordion() call gets rid of the error.

Some possible solutions:

• If this is just a limitation of the way it is implemented in Bootstrap and there isn't a way around it, then some documentation of either the accordion() return value, or the fact that an id is required in shiny apps even if you don't want to use it, would be good.
• If it can be fixed so that the above works without an id that would be even better 😁
• renderAccordion()/accordionOutput() functions?

Or is there an existing way to create dynamic (server-side) accordion()s that I'm unaware of?

Happy to contribute to any of the above if you'd like. Thanks! 👍

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^{Created on 2023-06-19 with reprex v2.0.2}

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