Cookies are still sent for requests in which the response is opaque to the current document/window (e.g. <img>, <video>, <audio>, <script>, etc). There's no way

Cookies are still sent for requests in which the response is opaque to the current document/window (e.g. <img>, <video>, <audio>, <script>, etc). There's no way for the document/window containing these elements to ever access the actual bytes returned by them.