BrowserVersionOwn?TypeAs String
Chrome85.0.4183???
Chrome86.0.4240ownfunctionfunction VideoTrackList() { [native code] }
Chrome88.0.4301???
Edge86.0.622???
Firefox68.0.0???
IE10.0.0???
Safari10.1.2ownfunctionfunction VideoTrackList() { [native code] }

PropertiesChromeEdgeFirefoxIESafari
length 86.0.4240??? 10.0.0
prototype 86.0.4240??? 10.0.0