[Vuejs]-How to best tackle sharing of state between components in same view

Vuex is your answer.
https://vuex.vuejs.org/en/intro.html

This is the solution for the sharing of states.

You will create the store, connect your states with store and use actions/mutations to work with them.

It will give you great foundation for state sharing which, if you will need to, you will easily scale up.

Good luck!