URL:

Repro Steps:

1. Open http://output.jsbin.com/rokoze in Edge 13.10586.
2. Resize the window.
3. Observe that the alert box says "The ‘resize’ event is of type: UIEvent".

In all other major browsers, the alert box instead says "The ‘resize’ event is of type: Event". (And this instance-of relationship can be verified by examining the resize event object in the browsers’ JS consoles.)

Expected Results:

The resize event should be an instance of Event rather than UIEvent.
Per https://drafts.csswg.org/cssom-view/#resizing-viewports

[…] fire an event named resize at the Window object associated with doc
And per https://dom.spec.whatwg.org/#concept-event-fire
To “fire an event named e” means that a new event using the Event interface, […]

Actual Results:

Dev Channel specific:

No