Available on js
@:value(cast "closed")@:impl@:enuminlineread onlyCLOSED:MediaSourceReadyState = "closed"
@:value(cast "ended")@:impl@:enuminlineread onlyENDED:MediaSourceReadyState = "ended"
@:value(cast "open")@:impl@:enuminlineread onlyOPEN:MediaSourceReadyState = "open"