dictionary IdleOptions {
  [EnforceRange] unsigned long threshold;
  AbortSignal signal;
};

enum UserIdleState {
    "active",
    "idle"
};

enum ScreenIdleState {
    "locked",
    "unlocked"
};

[
  SecureContext,
  Exposed=(Window,Worker)
] interface IdleDetector : EventTarget {
  constructor();
  readonly attribute UserIdleState? userState;
  readonly attribute ScreenIdleState? screenState;
  attribute EventHandler onchange;
  Promise<any> start(optional IdleOptions options = {});
};