To align with ES6 we should set the [[Prototype]] of the interface object to the parent interface object. For example: HTMLElement.__proto__ === Element Moz bug with patch: https://bugzilla.mozilla.org/show_bug.cgi?id=860841 Blink bug: https://code.google.com/p/chromium/issues/detail?id=230506
I took both testcases landed by Chrome patch and turned it into JSFiddle: Link - https://jsfiddle.net/nehay27L/show & https://jsfiddle.net/u1v4cbLd/show Safari 16.1 passes all those tests and I took the latest code of test case from "source.chromium.org". Do we need anything else? Thanks!
This is config changed.