Function trackEventListener

  • trackEventListener(target): Record<string, boolean>

  • Keep records on whether an event listener has been added.

    Parameters

    • target: EventTarget

      EventTarget to override.

    Returns Record<string, boolean>

    Map from event type to whether listeners may exist.

    Remarks

    This may allow EventTarget subclass to skip certain event generation code paths. Tracking is imprecise: it does not consider once() and removeEventListener().

Settings

Member Visibility

Theme