BrowserVersionOwn?TypeAs String
BingPreview1.0.0???
Chrome49.0.2623ownobject[object Object]
Chrome68.0.3440???
Dalvik2.1.0???
Edge85.0.564???
Extension19.0.0???
fetch1.0.0???
Firefox3.5.2???
HeadlessChrome76.0.3803???
IE10.0.0ownobject[object ClientRectPrototype]
MTRobot0.2.0???
Preview0.5.0???
Safari4.0.0???
Safari10.1.2ownobject[object ClientRectPrototype]
Safari11.0.0???
SamsungBrowser13.0.0???
SFive80.0.0???
XC1.4.0???
YandexBot3.0.0???
zgrab0.0.0???

PropertiesBingPreviewChromeDalvikEdgeExtensionfetchFirefoxHeadlessChromeIEMTRobotPreviewSafariSamsungBrowserSFiveXCYandexBotzgrab
bottom? 49.0.2623????????? 10.1.2?????
constructor? 49.0.2623????????? 10.1.2?????
height? 49.0.2623????????? 10.1.2?????
left? 49.0.2623????????? 10.1.2?????
right? 49.0.2623????????? 10.1.2?????
toJSON??????????? 10.1.2?????
top? 49.0.2623????????? 10.1.2?????
width? 49.0.2623????????? 10.1.2?????