BrowserVersionOwn?TypeAs String
Chrome94.0.4590???
Edge92.0.902ownfunctionfunction MutationObserver() { [native code] }
Firefox90.0.0???
Java11.0.10???

PropertiesChromeEdgeFirefoxJava
length 86.0.4240 92.0.902??
prototype 86.0.4240 92.0.902??