golem::add_js_handler("name")

or add

$( document ).ready(function() {
  Shiny.addCustomMessageHandler('fun', function(arg) {
    
  })
});

In inst/app/www/handler.js

In R/app_ui.R :

golem_add_external_resources <- function(){
  
  addResourcePath(
    'www', system.file('app/www', package = 'nineties')
  )
  
  tags$head(
    golem::activate_js(),
    golem::favicon(), 
    tags$script(src="www/handlers.js")
  )
}

From the server side:

session$sendCustomMessage("fun", arg)

Good practice

$( document ).ready(function() {
  Shiny.addCustomMessageHandler('fun', function(arg) {
    arg.this + arg.that
  })
});

Call them with

session$sendCustomMessage(
  "fun", 
  list(
    this = 40, 
    that = 42
  )
)

notifyjs is an open source JavaScript library designed to create custom notification boxes, released under the MIT License.

Notify.js is a jQuery plugin to provide simple yet fully customisable notifications.

https://notifyjs.jpillora.com/

JS available at: https://rawgit.com/notifyjs/notifyjs/master/dist/notify.js

Bring notifyjs to Shiny

• Should go into app/inst/www

• Link the script to the app in R/app_ui.R, in the golem_add_external_resources

Use a tags$script or create an htmlDependency

See "Custom Styling Guide" at https://notifyjs.jpillora.com/

• pop_succes(text)
• pop_error(text)
• pop_info(text)
• pop_warn(text)
• pop_succes(text, position)
• pop_error(text, position)
• pop_info(text, position)
• pop_warn(text, position)
• pop_succes(text, autoHide)
• pop_error(text, duration)
• pop_info(text, clickToHide)