chromium/third_party/blink/renderer/core/accessibility/aria_notification_options.idl

enum AriaNotifyInterrupt { "none", "all", "pending" };
enum AriaNotifyPriority { "none", "important" };

dictionary AriaNotificationOptions {
  AriaNotifyInterrupt interrupt = "none";
  AriaNotifyPriority priority = "none";
  DOMString notificationId = "";
};