https://onevent.com/tag/veranstaltungstechnik/
Veranstaltungstechnik – onEvent
veranstaltungstechnikonevent
https://v3.canjs.com/doc/can-reflect/observe.onEvent.html
onEvent | can-reflect | Typed Data | API Docs | CanJS
Register a named event handler on an observable object
api docsoneventreflecttypeddata