Function invoke 

fn invoke(
    segment: &EventPathSegment,
    segment_index_in_path: usize,
    event: &Event,
    phase: ListenerPhase,
    timeline_window: Option<&Window>,
    legacy_output_did_listeners_throw: Option<&Cell<bool>>,
    can_gc: CanGc,
)

https://dom.spec.whatwg.org/#concept-event-listener-invoke