Gio.File.prototype.append_to_async

function append_to_async(flags: Gio.FileCreateFlags, io_priority: Number(gint), cancellable: Gio.Cancellable, callback: Gio.AsyncReadyCallback): void {
    // Gjs wrapper for g_file_append_to_async()
}
  

Asynchronously opens file for appending.

For more details, see Gio.File.prototype.append_to which is the synchronous version of this call.

When the operation is finished, callback will be called. You can then call Gio.File.prototype.append_to_finish to get the result of the operation.