BrowserVersionOwn?TypeAs String
Chrome81.0.4044???
Edge86.0.622???
Firefox68.0.0???
HeadlessChrome81.0.4044???
IE10.0.0???
Safari10.1.2???
Safari11.0.0ownfunctionfunction DataCue() { [native code] }

PropertiesChromeEdgeFirefoxHeadlessChromeIESafari
length????? 11.0.0
prototype????? 11.0.0