BrowserVersionOwn?TypeAs String
Chrome81.0.4044???
Chrome86.0.4240ownfunctionfunction CSSPageRule() { [native code] }
Chrome88.0.4301???
Edge86.0.622ownfunctionfunction CSSPageRule() { [native code] }
Edge87.0.651???
Edge87.0.658ownfunctionfunction CSSPageRule() { [native code] }
Firefox68.0.0???
Firefox79.0.0ownfunctionfunction CSSPageRule() { [native code] }
HeadlessChrome81.0.4044???
IE10.0.0ownobject[object CSSPageRule]
Safari10.1.2ownfunctionfunction CSSPageRule() { [native code] }

PropertiesChromeEdgeFirefoxHeadlessChromeIESafari
CHARSET_RULE 86.0.4240 86.0.622 79.0.0?? 10.0.0
COUNTER_STYLE_RULE?? 79.0.0???
FONT_FACE_RULE 86.0.4240 86.0.622 79.0.0?? 10.0.0
FONT_FEATURE_VALUES_RULE?? 79.0.0???
IMPORT_RULE 86.0.4240 86.0.622 79.0.0?? 10.0.0
KEYFRAMES_RULE 86.0.4240 86.0.622 79.0.0?? 10.0.0
KEYFRAME_RULE 86.0.4240 86.0.622 79.0.0?? 10.0.0
length 86.0.4240 86.0.622 79.0.0?? 10.0.0
MEDIA_RULE 86.0.4240 86.0.622 79.0.0?? 10.0.0
NAMESPACE_RULE 86.0.4240 86.0.622 79.0.0?? 10.0.0
PAGE_RULE 86.0.4240 86.0.622 79.0.0?? 10.0.0
prototype 86.0.4240 86.0.622 79.0.0? 10.0.0 10.0.0
STYLE_RULE 86.0.4240 86.0.622 79.0.0?? 10.0.0
SUPPORTS_RULE 86.0.4240 86.0.622 79.0.0?? 10.0.0
UNKNOWN_RULE????? 10.0.0
WEBKIT_KEYFRAMES_RULE????? 10.0.0
WEBKIT_KEYFRAME_RULE????? 10.0.0
WEBKIT_REGION_RULE????? 10.0.0