BrowserVersionOwn?TypeAs String
Chrome85.0.4183???
Chrome86.0.4240ownfunctionfunction MediaSource() { [native code] }
Chrome88.0.4301???
Edge86.0.622ownfunctionfunction MediaSource() { [native code] }
Edge87.0.651???
Edge87.0.658ownfunctionfunction MediaSource() { [native code] }
Firefox68.0.0ownfunctionfunction MediaSource() { [native code] }
IE10.0.0???
IE11.0.0ownfunction function MediaSource() { [native code] }
Safari10.1.2ownfunctionfunction MediaSource() { [native code] }
Safari11.0.0???

PropertiesChromeEdgeFirefoxIESafari
isTypeSupported 86.0.4240 86.0.622 68.0.0 11.0.0 10.1.2
length 86.0.4240 86.0.622 68.0.0? 10.1.2
prototype 86.0.4240 86.0.622 68.0.0 11.0.0 10.1.2