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

PropertiesChromeEdgeFirefoxHeadlessChromeIESafari
CHARSET_RULE 86.0.4240 86.0.622 79.0.0???
COUNTER_STYLE_RULE?? 79.0.0???
FONT_FACE_RULE 86.0.4240 86.0.622 79.0.0???
FONT_FEATURE_VALUES_RULE?? 79.0.0???
IMPORT_RULE 86.0.4240 86.0.622 79.0.0???
KEYFRAMES_RULE 86.0.4240 86.0.622 79.0.0???
KEYFRAME_RULE 86.0.4240 86.0.622 79.0.0???
length 86.0.4240 86.0.622 79.0.0???
MEDIA_RULE 86.0.4240 86.0.622 79.0.0???
NAMESPACE_RULE 86.0.4240 86.0.622 79.0.0???
PAGE_RULE 86.0.4240 86.0.622 79.0.0???
prototype 86.0.4240 86.0.622 79.0.0???
STYLE_RULE 86.0.4240 86.0.622 79.0.0???
SUPPORTS_RULE 86.0.4240 86.0.622 79.0.0???