BrowserVersionOwn?TypeAs String
Chrome85.0.4183???
Chrome86.0.4240ownfunctionfunction FocusEvent() { [native code] }
CriOS85.0.4183???
Edge86.0.622ownfunctionfunction FocusEvent() { [native code] }
Edge87.0.651???
Edge87.0.658ownfunctionfunction FocusEvent() { [native code] }
Firefox68.0.0ownfunctionfunction FocusEvent() { [native code] }
IE10.0.0ownobject[object FocusEvent]
Safari10.1.2ownfunctionfunction FocusEvent() { [native code] }

PropertiesChromeCriOSEdgeFirefoxIESafari
ALT_MASK??? 68.0.0??
AT_TARGET 86.0.4240? 86.0.622 68.0.0? 10.0.0
BLUR????? 10.1.2
BUBBLING_PHASE 86.0.4240? 86.0.622 68.0.0? 10.0.0
CAPTURING_PHASE 86.0.4240? 86.0.622 68.0.0? 10.0.0
CHANGE????? 10.1.2
CLICK????? 10.1.2
CONTROL_MASK??? 68.0.0??
DBLCLICK????? 10.1.2
DRAGDROP????? 10.1.2
FOCUS????? 10.1.2
KEYDOWN????? 10.1.2
KEYPRESS????? 10.1.2
KEYUP????? 10.1.2
length 86.0.4240? 86.0.622 68.0.0? 10.0.0
META_MASK??? 68.0.0??
MOUSEDOWN????? 10.1.2
MOUSEDRAG????? 10.1.2
MOUSEMOVE????? 10.1.2
MOUSEOUT????? 10.1.2
MOUSEOVER????? 10.1.2
MOUSEUP????? 10.1.2
NONE 86.0.4240? 86.0.622 68.0.0? 10.0.0
prototype 86.0.4240? 86.0.622 68.0.0 10.0.0 10.0.0
SCROLL_PAGE_DOWN??? 68.0.0??
SCROLL_PAGE_UP??? 68.0.0??
SELECT????? 10.1.2
SHIFT_MASK??? 68.0.0??