BrowserVersionOwn?TypeAs String
BingPreview1.0.0???
Chrome27.0.1500???
Edge85.0.564???
Firefox46.8.0???
IE10.0.0???
Safari4.0.0???
SamsungBrowser13.0.0???
SFive80.0.0???
TkBot0.1.0???
YandexBot3.0.0ownfunctionfunction PerformanceFrameTiming() { [native code] }

PropertiesBingPreviewChromeEdgeFirefoxIESafariSamsungBrowserSFiveTkBotYandexBot
length????????? 3.0.0
prototype????????? 3.0.0