Gtk.Spinner

const Gtk = imports.gi.Gtk;

let spinner = new Gtk.Spinner({
    active: value,
});
  

A GtkSpinner widget displays an icon-size spinning animation. It is often used as an alternative to a Gtk.ProgressBar for displaying indefinite activity, instead of actual progress.

To start the animation, use Gtk.start, to stop it use Gtk.stop.