updateSelectInput
From shiny v0.12.2
by Winston Chang
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 toshinyServer
. - 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 insideI()
will be treated as literal JavaScript code; see - server
- whether to store
choices
on the server side, and load the select options dynamically on searching, instead of writing allchoices
into the page at once (i.e., only use the client-side version ofselectize.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.
See Also
Examples
shinyServer(function(input, output, session) {
observe({
# We'll use the input$controller variable multiple times, so save it as x
# for convenience.
x <- input$controller
# Create a list of new options, where the name of the items is something
# like 'option label x 1', and the values are 'option-x-1'.
s_options <- list()
s_options[[sprintf("option label %d 1", x)]] <- sprintf("option-%d-1", x)
s_options[[sprintf("option label %d 2", x)]] <- sprintf("option-%d-2", x)
# Change values for input$inSelect
updateSelectInput(session, "inSelect", choices = s_options)
# Can also set the label and select an item (or more than one if it's a
# multi-select)
updateSelectInput(session, "inSelect2",
label = paste("Select label", x),
choices = s_options,
selected = sprintf("option-%d-2", x)
)
})
})
Community examples
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