1 [Exposed=(Window, Worker), Pref="dom.enable_web_task_scheduling"]
2 interface TaskPriorityChangeEvent : Event {
3 constructor (DOMString type , TaskPriorityChangeEventInit priorityChangeEventInitDict);
4 readonly attribute TaskPriority previousPriority;
7 dictionary TaskPriorityChangeEventInit : EventInit {
8 required TaskPriority previousPriority;