BrowserVersionOwn?TypeAs String
Chrome81.0.4044???
Edge86.0.622???
Firefox68.0.0???
HeadlessChrome81.0.4044???
IE10.0.0???
Safari10.1.2ownfunctionfunction getMatchedCSSRules() { [native code] }

PropertiesChromeEdgeFirefoxHeadlessChromeIESafari
length????? 10.0.0