SSIA. To better align with web-spec: Web-Spec: https://html.spec.whatwg.org/#texttrackcue Following needs to be fixed: attribute double endTime; to attribute unrestricted double endTime; and also in Constructor: [CallWith=CurrentDocument] constructor(double startTime, double endTime, DocumentFragment cueNode); __ Just wanted to raise this bug for tracking purposes. Thanks!
<rdar://problem/114859626>