How to properly write/post data to vuex from a nested component tree?

Question

JavaScript

In vuex , you need to save data through mutations, so that the time machine would work, etc.
https://jsfiddle.net/3p0j5sgy/1122/
Each child component does not have access to the entire tree, and changing through a loop is also not very productive when there are thousands of rows of data. I ask for help in writing an easy and elegant solution :)
Thank you!

Answer 1

In fact, the item component is a "stupid" component (a pure function), so it would be better to return all the changes that it makes by events along the chain to the nearest "smart" component, and let it perform the necessary transformations in the store.
https://jsfiddle.net/3p0j5sgy/1125/ is that what you need?