Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The ExtendableCookieChangeEvent() constructor creates a new ExtendableCookieChangeEvent object which is the event type passed to ServiceWorkerRegistration.oncookiechange(). This constructor is called by the browser when a change event occurs.
Note: This event constructor is generally not needed for production websites. It's primary use is for tests that require an instance of this event.
