Change the value of a select input on the client
Change the value of a select input on the client
updateSelectInput( session = getDefaultReactiveDomain(), inputId, label = NULL, choices = NULL, selected = NULL ) updateSelectizeInput( session = getDefaultReactiveDomain(), inputId, label = NULL, choices = NULL, selected = NULL, options = list(), server = FALSE ) updateVarSelectInput( session = getDefaultReactiveDomain(), inputId, label = NULL, data = NULL, selected = NULL ) updateVarSelectizeInput( session = getDefaultReactiveDomain(), inputId, label = NULL, data = NULL, selected = NULL, options = list(), server = FALSE )
session |
The |
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. It's also possible to group related inputs by providing a named list
whose elements are (either named or unnamed) lists, vectors, or factors. In
this case, the outermost names will be used as the group labels (leveraging
the |
selected |
The initially selected value (or multiple values if |
options |
A list of options. See the documentation of selectize.js
for possible options (character option values inside |
server |
whether to store |
data |
A data frame. Used to retrieve the column names as choices for a |
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).
## 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)
}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.