2.1.103 [W3C-HTML51] Section 7.1.3.9 Unhandled promise rejections

V0421: The PromiseRejectionEvent interface is not supported

The specification states:

 7.1.3.9. Unhandled promise rejections
     ...
     In addition to synchronous runtime script errors, scripts may experience asynchronous 
     promise rejections, tracked via the unhandledrejection and rejectionhandled events.
  
 7.1.3.9.1. The HostPromiseRejectionTracker implementation
  
     ECMAScript contains an implementation-defined HostPromiseRejectionTracker(promise, 
     operation) abstract operation. User agents must use the following implementation: 
     [ECMA-262]
  
 7.1.3.9.2. The PromiseRejectionEvent interface
  
     [Constructor(DOMString type, PromiseRejectionEventInit eventInitDict), 
     Exposed=(Window,Worker)]
     interface PromiseRejectionEvent : Event {
         readonly attribute Promise<any> promise;
         readonly attribute any reason;
     };

EdgeHTML Mode

The PromiseRejectionEvent interface is not supported.