Available on js
@:value(cast "not-allowed")@:enum@:implinlineread onlyNOT_ALLOWED:MediaKeysRequirement = "not-allowed"
@:value(cast "optional")@:enum@:implinlineread onlyOPTIONAL:MediaKeysRequirement = "optional"
@:value(cast "required")@:enum@:implinlineread onlyREQUIRED:MediaKeysRequirement = "required"