BrowserVersionOwn?TypeAs String
BingPreview1.0.0???
Chrome49.0.2623???
Edge85.0.564???
Firefox68.0.0???
Firefox78.0.0ownfunctionfunction MediaKeyError() { [native code] }
IE10.0.0???
Project1.3.2???
Qwantify1.0.0???
requests2.25.0???
Safari10.1.2???
SamsungBrowser13.0.0???
YandexBot3.0.0???

PropertiesBingPreviewChromeEdgeFirefoxIEProjectQwantifyrequestsSafariSamsungBrowserYandexBot
ALT_MASK??? 70.0.0???????
AT_TARGET??? 70.0.0???????
BUBBLING_PHASE??? 70.0.0???????
CAPTURING_PHASE??? 70.0.0???????
CONTROL_MASK??? 70.0.0???????
length??? 70.0.0???????
META_MASK??? 70.0.0???????
NONE??? 70.0.0???????
prototype??? 70.0.0???????
SHIFT_MASK??? 70.0.0???????