BrowserVersionOwn?TypeAs String
Chrome85.0.4183???
Chrome86.0.4240ownfunctionfunction XMLHttpRequestEventTarget() { [native code] }
Chrome88.0.4301???
Edge86.0.622ownfunctionfunction XMLHttpRequestEventTarget() { [native code] }
Firefox68.0.0???
Firefox79.0.0ownfunctionfunction XMLHttpRequestEventTarget() { [native code] }
IE10.0.0ownobject[object XMLHttpRequestEventTarget]
Safari10.1.2ownfunctionfunction XMLHttpRequestEventTarget() { [native code] }

PropertiesChromeEdgeFirefoxIESafari
length 86.0.4240 86.0.622 79.0.0? 10.0.0
prototype 86.0.4240 86.0.622 79.0.0 10.0.0 10.0.0