BrowserVersionOwn?TypeAs String
ALAFISH89.0.4389???
Chrome38.0.2125???
Edge17.17134.0???
Firefox51.0.0???
Firefox56.0.0ownobject[object PaintRequestPrototype]
Firefox64.0.0???
Firefox70.0.0ownobject[object PaintRequestPrototype]
Firefox78.0.0ownobject[object PaintRequest]
FxiOS33.0.0???
IE10.0.0???
Safari4.0.0???

PropertiesALAFISHChromeEdgeFirefoxFxiOSIESafari
clientRect??? 70.0.0???
constructor??? 70.0.0???
reason??? 70.0.0???