insertUI: Insert UI objects
In ymd526442121/Rproject_shiny: Web Application Framework for R

Description Usage Arguments Details See Also Examples

Insert a UI object into the app.

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insertUI(selector, multiple = FALSE, where = c("beforeBegin", "afterBegin",
  "beforeEnd", "afterEnd"), ui, immediate = FALSE, container = if (inline)
  "span" else "div", inline = FALSE, session = getDefaultReactiveDomain())

`selector`	A string that is accepted by jQuery's selector (i.e. the string `s` to be placed in a `$(s)` jQuery call). This selector will determine the element(s) relative to which you want to insert your UI object.
`multiple`	In case your selector matches more than one element, `multiple` determines whether Shiny should insert the UI object relative to all matched elements or just relative to the first matched element (default).
`where`	Where your UI object should go relative to the selector: `beforeBegin` Before the selector element itself `afterBegin` Just inside the selector element, before its first child `beforeEnd` Just inside the selector element, after its last child (default) `afterEnd` After the selector element itself Adapted from here.
`ui`	The UI object you want to insert. This can be anything that you usually put inside your apps's `ui` function.
`immediate`	Whether the UI object should be immediately inserted into the app when you call `insertUI`, or whether Shiny should wait until all outputs have been updated and all observers have been run (default).
`container`	A function to generate an HTML element to contain the UI object.
`inline`	Use an inline (`span()`) or block container (`div()`, default) for the output.
`session`	The shiny session within which to call `insertUI`.

This function allows you to dynamically add an arbitrarily large UI object into your app, whenever you want, as many times as you want. Unlike renderUI, the UI generated with insertUI is not updatable as a whole: once it's created, it stays there. Each new call to insertUI creates more UI objects, in addition to the ones already there (all independent from one another). To update a part of the UI (ex: an input object), you must use the appropriate render function or a customized reactive function. To remove any part of your UI, use removeUI.

Note that whatever UI object you pass through ui, it is always wrapped in an extra div (or if inline = TRUE, a span) before making its way into the DOM. This does not affect what you mean to do, and it makes it easier to remove the whole UI object using removeUI (if you wish to do so, of course).

removeUI

## Only run this example in interactive R sessions
if (interactive()) {
# Define UI
ui <- fluidPage(
  actionButton("add", "Add UI")
)

# Server logic
server <- function(input, output, session) {
  observeEvent(input$add, {
    insertUI(
      selector = "#add",
      where = "afterEnd",
      ui = textInput(paste0("txt", input$add),
                     "Insert some text")
    )
  })
}

# Complete app with UI and server components
shinyApp(ui, server)
}