Run R code when an event is triggered on an element

Description

onclick runs an R expression (either a shinyjs function or any other code) when an element is clicked.

onevent is similar, but can be used when any event is triggered on the element, not only a mouse click. See below for a list of possible event types. Using "click" results in the same behaviour as calling onclick.

Usage

onclick(id, expr, add = FALSE)

onevent(event, id, expr, add = FALSE)

Arguments

Possible event types

Any mouse or keyboard events that are supported by JQuery can be used. The full list of events that can be used is: click, dblclick, hover, mousedown, mouseenter, mouseleave, mousemove, mouseout, mouseover, mouseup, keydown, keypress, keyup.

Note

shinyjs must be initialized with a call to useShinyjs() in the app's ui.

See Also

useShinyjs, runExample

Examples

if (interactive()) {
  library(shiny)

  shinyApp(
    ui = fluidPage(
      useShinyjs(),  # Set up shinyjs
      p(id = "date", "Click me to see the date"),
      p(id = "disappear", "Move your mouse here to make the text below disappear"),
      p(id = "text", "Hello")
    ),
    server = function(input, output) {
      onclick("date", info(date()))
      onevent("mouseenter", "disappear", hide("text"))
      onevent("mouseleave", "disappear", show("text"))
    }
  )
}
## Not run: 
  # The shinyjs function call in the above app can be replaced by
  # any of the following examples to produce similar Shiny apps
  onclick("disappear", toggle("text"))
  onclick(expr = text("date", date()), id = "date")

## End(Not run)

Results