BrowserVersionOwn?TypeAs String
Chrome81.0.4044???
Chrome85.0.4183ownfunctionfunction MIDIMessageEvent() { [native code] }
Chrome88.0.4301???
Edge86.0.622ownfunctionfunction MIDIMessageEvent() { [native code] }
Edge87.0.651???
Edge87.0.658ownfunctionfunction MIDIMessageEvent() { [native code] }
Firefox68.0.0???
HeadlessChrome81.0.4044???
IE10.0.0???
Safari10.1.2???

PropertiesChromeEdgeFirefoxHeadlessChromeIESafari
AT_TARGET 85.0.4183 86.0.622????
BUBBLING_PHASE 85.0.4183 86.0.622????
CAPTURING_PHASE 85.0.4183 86.0.622????
length 85.0.4183 86.0.622????
NONE 85.0.4183 86.0.622????
prototype 85.0.4183 86.0.622????