Run work while a map spinner is visible (Shiny) — spinWhile • leaflet.extras2

Starts the spinner, waits until the browser has painted it (and Shiny has flushed that update), then evaluates expr and always stops the spinner.

Usage

spinWhile(
  mapId,
  expr,
  options = NULL,
  session = shiny::getDefaultReactiveDomain()
)

Arguments

mapId: The outputId of the leafletOutput.
expr: Expression to evaluate after the spinner is shown.
options: Passed to startSpinner.
session: The Shiny session; default is the current domain.

Value

The Shiny session (invisible).

See also

Other Spinner Functions: addSpinner()

Examples

if (FALSE) { # \dontrun{
observeEvent(input$go, {
  spinWhile("leaf", {
    Sys.sleep(2)
    leafletProxy("leaf") %>% addMarkers(data = quakes, ~long, ~lat)
  })
})
} # }