BrowserVersionOwn?TypeAs String
BingPreview1.0.0???
Chrome49.0.2623???
Edge85.0.564???
Firefox68.0.0???
IE10.0.0???
Safari10.1.2ownfunctionfunction WebKitNamespace() { [native code] }
Safari14.0.3???
SamsungBrowser13.0.0???
YandexBot3.0.0???

PropertiesBingPreviewChromeEdgeFirefoxIESafariSamsungBrowserYandexBot
length????? 10.0.0??
prototype????? 10.0.0??