How can I change R-Shiny “checkboxinput” value to FALSE/TRUE programmatically?

问题

I want to change the checkboxinput value to FALSE/TRUE during run-time. How can I do this?

checkboxInput(inputId = "smoother", label = "Overlay smooth trend line", value = FALSE)

回答1:

You can use updateCheckboxInput(). See an example below:

Reproducible example:

library(shiny)
ui <- fluidPage(
  actionButton(
    inputId = "check",
    label = "update checkbox"
  ),
  checkboxInput(
    inputId =  "checkbox", 
    label = "Input checkbox"
  )
)

server <- function(input, output, session) {
  observeEvent(
    eventExpr = input$check, {
      updatedValue = !input$checkbox

      updateCheckboxInput(
        session =  session,
        inputId =  "checkbox", 
        value = updatedValue
      )
    }
  )
}

shinyApp(ui, server)

来源：https://stackoverflow.com/questions/56820844/how-can-i-change-r-shiny-checkboxinput-value-to-false-true-programmatically