BrowserVersionOwn?TypeAs String
Chrome94.0.4590???
Edge92.0.902???
Firefox90.0.0???
Java11.0.10???

PropertiesChromeEdgeFirefoxJava
ALT_MASK????
AT_TARGET????
BUBBLING_PHASE????
CAPTURING_PHASE????
CONTROL_MASK????
length????
META_MASK????
NONE????
prototype????
SHIFT_MASK????