Loading Screen for 'Shiny'

Full screen and partial loading screens for 'Shiny' with spinners, progress bars, and notifications.

Loading screens for Shiny; programatically show and hide a full page loading screen, comes with multiple spinners.

Installation

# install.packages("remotes")
remotes::install_github("JohnCoene/waiter")

How to

1. Place use_waiter anywhere in your UI.
2. Programatically call show_waiter
3. Don't forget to programatically hide the loading screen with hide_waiter

See ?spinners for a list of all the spinners.

Spinners

Browse the spinners locally with: waiter::browse_spinners()

Example

Basic example could be like this.

library(shiny)
library(waiter)
 
ui <- fluidPage(
  use_waiter(),
  actionButton("show", "Show loading for 5 seconds")
)
 
server <- function(input, output, session){
  observeEvent(input$show, {
    show_waiter(spin_fading_circles())
    Sys.sleep(4)
    hide_waiter()
  })
}
 
if(interactive()) shinyApp(ui, server)

How it is used in chirp.sh

library(shiny)
library(waiter)
 
ui <- navbarPage(
  "example",
  id = "tabs",
    header = list(
        tags$style("nav{display:none;}")
    ),
  tabPanel(
    "home",
    use_waiter(),
    actionButton("switch", "Go to networks tab")
  ),
  tabPanel(
    "networks",
    h3("Hello!")
  )
)
 
server <- function(input, output, session){
  observeEvent(input$switch, {
    show_waiter(
      tagList(
        spin_folding_cube(),
        "Loading ..."
      )
    )
    Sys.sleep(5)
    updateTabsetPanel(session = session, inputId = "tabs", selected = "networks")
    hide_waiter()
  })
}
 
shinyApp(ui, server)