173081 2017-06-07 15:52:34 -0700 navigator.mediaDevices should be instance of EventTarget 2021-03-16 19:26:50 -0700 1 1 1 Unclassified WebKit New Bugs Safari Technology Preview Mac macOS 10.12 RESOLVED DUPLICATE 187575 InRadar P2 Normal --- 1 stefanf webkit-unassigned ashvayka eric.carlson jeremyj-wk jer.noble stefanf webkit-bug-importer youennf oldest_to_newest 1316692 0 stefanf 2017-06-07 15:52:34 -0700 Overview: navigator.mediaDevices does not implement EventTarget, although the current Media Capture specification draft states (in the WebIDL section below https://w3c.github.io/mediacapture-main/#mediadevices), that MediaDevices and thus navigator.mediaDevices inherits from the EventTarget. Steps to Reproduce: 1. Open the Web Inspector on any page 2. Try using the EventTarget's methods (addEventListener...) on navigator.mediaDevices Actual Result: The desired methods are not available. navigator.mediaDevices instanceof EventTarget === false Expected Result: One can use addEventListener and removeEventListener to listen for the "devicechange" event. Build Date & Hardware: Safari TP 33 on macOS 10.12.5 1317189 1 webkit-bug-importer 2017-06-08 21:46:03 -0700 <rdar://problem/32666694> 1740352 2 ashvayka 2021-03-16 19:26:50 -0700 r233761 fixed `navigator.mediaDevices` to extend EventTarget. *** This bug has been marked as a duplicate of bug 187575 ***