Unhandled Rejection Tracking Browser Events

This repository used to be a place to work on some spec patches to HTML and ECMAScript to add support for events to track unhandled promise rejections, as originally proposed on the WHATWG mailing list.

Changes to ECMAScript

Moved to tc39/ecma262#76

Changes to HTML

Moved to whatwg/html#224

Tests

Moved to w3c/web-platform-tests#2388