onrejectionhandled / onunhandledrejection are missing in WorkerGlobalScope

[ghost]

This should work:

// In a worker

// Handle promise rejection...
self.onunhandledrejection((event: PromiseRejectionEvent) => {
  throw event.reason;
});

// ...so that let main thread know this promise is rejected.
Promise.new((resolve, reject) => {
  throw new Error('Oops!');
});

But I get Property 'onunhandledrejection' does not exist on type 'WorkerGlobalScope & typeof globalThis'..

The unhandledrejection event is useful for debugging when you write some code that imports modules asynchronously in a Worker.
I am not sure whether these events / handlers in WorkerGlobalScope context are defined by specifications, but at least MDN says "typically, this is the window, but may also be a Worker" and it works in a Worker.