PropertiesChromeCriOSEdgeFirefoxGooglebotIEOperaSafariSamsungBrowser
length 27.0.1025? 12.0.0 18.0.0 2.1.0 11.0.0? 3.0.0 4.0.0
prototype 27.0.1025? 12.0.0 18.0.0 2.1.0 11.0.0? 3.0.0 4.0.0