updateSelectInput

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Change the value of a select input on the client

Change the value of a select input on the client

Usage
updateSelectInput(session, inputId, label = NULL, choices = NULL, selected = NULL)
updateSelectizeInput(session, inputId, label = NULL, choices = NULL, selected = NULL, options = list(), server = FALSE)
Arguments
session
The session object passed to function given to shinyServer.
inputId
The id of the input object.
label
The label to set for the input object.
choices
List of values to select from. If elements of the list are named then that name rather than the value is displayed to the user.
selected
The initially selected value (or multiple values if multiple = TRUE). If not specified then defaults to the first value for single-select lists and no values for multiple select lists.
options
A list of options. See the documentation of selectize.js for possible options (character option values inside I() will be treated as literal JavaScript code; see renderDataTable() for details).
server
whether to store choices on the server side, and load the select options dynamically on searching, instead of writing all choices into the page at once (i.e., only use the client-side version of selectize.js)
Details

The input updater functions send a message to the client, telling it to change the settings of an input object. The messages are collected and sent after all the observers (including outputs) have finished running.

The syntax of these functions is similar to the functions that created the inputs in the first place. For example, numericInput() and updateNumericInput() take a similar set of arguments.

Any arguments with NULL values will be ignored; they will not result in any changes to the input object on the client.

For radioButtons(), checkboxGroupInput() and selectInput(), the set of choices can be cleared by using choices=character(0). Similarly, for these inputs, the selected item can be cleared by using selected=character(0).

See Also

selectInput

Aliases
  • updateSelectInput
  • updateSelectizeInput
Examples
## Only run examples in interactive R sessions
if (interactive()) {

ui <- fluidPage(
  p("The checkbox group controls the select input"),
  checkboxGroupInput("inCheckboxGroup", "Input checkbox",
    c("Item A", "Item B", "Item C")),
  selectInput("inSelect", "Select input",
    c("Item A", "Item B", "Item C"))
)

server <- function(input, output, session) {
  observe({
    x <- input$inCheckboxGroup

    # Can use character(0) to remove all choices
    if (is.null(x))
      x <- character(0)

    # Can also set the label and select items
    updateSelectInput(session, "inSelect",
      label = paste("Select input label", length(x)),
      choices = x,
      selected = tail(x, 1)
    )
  })
}

shinyApp(ui, server)
}
Documentation reproduced from package shiny, version 0.14.2, License: GPL-3 | file LICENSE

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