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

PropertiesChromeEdgeFirefoxJava
c1Debounce????
length 91.0.4472 92.0.902 90.0.0?
prototype????