BrowserVersionOwn?TypeAs String
BingPreview1.0.0???
Chrome27.0.1500???
Edge85.0.564???
Firefox51.0.0ownfunctionfunction FontFaceSet() { [native code] }
Firefox52.0.0???
Firefox68.0.0ownfunctionfunction FontFaceSet() { [native code] }
Firefox88.0.0???
IE10.0.0???
Safari4.0.0???
Safari10.1.2ownfunctionfunction FontFaceSet() { [native code] }
Safari13.0.3???
Safari13.0.4ownfunctionfunction FontFaceSet() { [native code] }
SamsungBrowser13.0.0???
SFive80.0.0???
TkBot0.1.0???
YandexBot3.0.0???

PropertiesBingPreviewChromeEdgeFirefoxIESafariSamsungBrowserSFiveTkBotYandexBot
length??? 51.0.0? 10.0.0????
prototype??? 51.0.0? 10.0.0????