Function insert_non_delegated_event 

pub fn insert_non_delegated_event(
    element: &Element,
    onevent: &EventName,
    callback: &EventHandler,
    events_id: ElementEventsId,
    events: &VirtualEvents,
)

Attaches an event handler directly onto a DOM element.

See VirtualEvents and EventName::is_delegated for documentation regarding event delegation.