BrowserVersionOwn?TypeAs String
Chrome86.0.4240ownfunctionfunction WebSocketStream() { [native code] }
Chrome88.0.4291???
Chrome88.0.4292ownfunctionfunction WebSocketStream() { [native code] }
Edge86.0.622???
Firefox78.0.0???
IE7.0.0???
Safari10.1.2???

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