- addEventListener(type: "error", listener: (this: this, ev: ErrorEvent) => any, useCapture?: boolean): void;

+ addEventListener(type: "error", listener: (this: this, ev: ProgressEvent) => any, useCapture?: boolean): void;

Is that right?

Why not?

Here is the change that brought this in: microsoft/TypeScript-DOM-lib-generator#144

@mhegazy It just seemed odd that the event object type of the error event changed from ErrorEvent to ProgressEvent. I didn't bother checking whether or not it was actually correct.

@errorx666 the spec said so: https://xhr.spec.whatwg.org/#events