So as I dug deeper into the design, I realized I didn’t need to use handle_event triggered by phx-change at all, so 1 & 3 are not needed. The “grouping” equivalent can be accomplished over the top. Your widget is quite elegant and carefully designed. There is a lot of work that has gone in to make it behave precisely ..
The one thing I struggled with is the interface/integration with the parent - I had to implement a new message to be able to get the “selection” event in the parent. I did not see a way for the parent to determine whether selections had been made.
For complex/tightly integrated interactions, is there an easier way to be able to get to the state of the component i.e. directly accessing variables ?
