PropertiesChromeCriOSEdgeFirefoxGooglebotIEOperaSafariSamsungBrowser
length 24.0.1312? 12.0.0 27.0.0 2.1.0?? 3.0.0 6.2.0
prototype 24.0.1312? 13.10586.0 55.0.0? 10.0.0? 4.0.0?