Definition
Notifications API Standard defines NotificationOptions
dictionary NotificationOptions {
NotificationDirection dir = "auto";
DOMString lang = "";
DOMString body = "";
DOMString tag = "";
USVString image;
USVString icon;
USVString badge;
VibratePattern vibrate;
EpochTimeStamp timestamp;
boolean renotify = false;
boolean? silent = null;
boolean requireInteraction = false;
any data = null;
sequence<NotificationAction> actions = [];
};