Inspect the history — rewind

rewind_history() gives one row for each entry that rewind keeps. rewind_can_undo() and rewind_can_redo() tell you if the position can change. All three functions depend on the history. You can thus use them in render*() and observe() to control your own UI.

Usage

rewind_history(session = shiny::getDefaultReactiveDomain())

rewind_can_undo(session = shiny::getDefaultReactiveDomain())

rewind_can_redo(session = shiny::getDefaultReactiveDomain())

Arguments

session: The Shiny session. The default is the current session.

Value

rewind_history() gives a data frame. It has the columns index, label, time and current. The other two functions give one logical value.

Examples

if (interactive()) {
  library(shiny)

  server <- function(input, output, session) {
    rewind_enable()
    output$steps <- renderTable(rewind_history())
  }
}