This link has a back to back view of a Flex object >> recoded to a Royale object. I haven’t seen this out in a tutorial before, but it helped me understand right away what needs to happen.
https://walkingtree.tech/converting-flex-application-html-js/?unapproved=2352&moderation-hash=9e929e00397a8acbf2463eab18dea8c7#comment-2352