BrowserVersionOwn?TypeAs String
Chrome85.0.4183???
Chrome86.0.4240ownfunctionfunction AmbientLightSensor() { [native code] }
Edge86.0.622???
Firefox68.0.0???
IE10.0.0???
Safari10.1.2???

PropertiesChromeEdgeFirefoxIESafari
length 86.0.4240????
prototype 86.0.4240????