Race condition / timing issue with custom behaviors about scrollmeister

[Prinzhorn]

Correction: since the elements follow the naming convention for custom elements (a dash) they do not inherit from HTMLUnknownElement. They will be unresolved and not unknown. So the second solution might just work. Assuming that https://github.com/WebReflection/document-register-element does the right things 😅

[Prinzhorn]

Seems to work, wrapped the customElements.define in an raf

[Prinzhorn]

BTW this was needed to separate the "extras" build, which (as of now) simply bundles more behaviors and imports them after the core (which calls customElements.define, now async)