TRUE from the moment snap_restore() is called until the browser reports
that the restore has settled (or timed out), FALSE otherwise. Inside a
reactive context the result is reactive, so observers and outputs can
react to the end of a restore; outside one it is a plain value.
Usage
snap_is_restoring(session = shiny::getDefaultReactiveDomain())Details
Use it to keep expensive observers from running on every intermediate value during a restore, and to run something once the state is complete.
Examples
if (interactive()) {
library(shiny)
server <- function(input, output, session) {
observeEvent(input$n, {
if (snap_is_restoring()) {
return()
}
message("user changed n to ", input$n)
})
}
}