BrowserVersionOwn?TypeAs String
Chrome86.0.4240ownfunctionfunction CSSNamespaceRule() { [native code] }
Chrome88.0.4291???
Chrome88.0.4292ownfunctionfunction CSSNamespaceRule() { [native code] }
Edge86.0.622ownfunctionfunction CSSNamespaceRule() { [native code] }
Edge87.0.651???
Edge87.0.658ownfunctionfunction CSSNamespaceRule() { [native code] }
Firefox78.0.0???
Firefox79.0.0ownfunctionfunction CSSNamespaceRule() { [native code] }
IE7.0.0???
Safari10.1.2ownfunctionfunction CSSNamespaceRule() { [native code] }

PropertiesChromeEdgeFirefoxIESafari
CHARSET_RULE 86.0.4240 86.0.622 68.0.0? 10.0.0
COUNTER_STYLE_RULE?? 68.0.0??
FONT_FACE_RULE 86.0.4240 86.0.622 68.0.0? 10.0.0
FONT_FEATURE_VALUES_RULE?? 68.0.0??
IMPORT_RULE 86.0.4240 86.0.622 68.0.0? 10.0.0
KEYFRAMES_RULE 86.0.4240 86.0.622 68.0.0? 10.0.0
KEYFRAME_RULE 86.0.4240 86.0.622 68.0.0? 10.0.0
length 86.0.4240 86.0.622 68.0.0? 10.0.0
MEDIA_RULE 86.0.4240 86.0.622 68.0.0? 10.0.0
NAMESPACE_RULE 86.0.4240 86.0.622 68.0.0? 10.0.0
PAGE_RULE 86.0.4240 86.0.622 68.0.0? 10.0.0
prototype 86.0.4240 86.0.622 68.0.0? 10.0.0
STYLE_RULE 86.0.4240 86.0.622 68.0.0? 10.0.0
SUPPORTS_RULE 86.0.4240 86.0.622 68.0.0? 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