How to track changes to an object received via mapState?

Question

Vue.js

I get the value from state, as an object

...mapState({
        test: state => state.calendar.test
      }),

I tried, through deep, but it does not work

test: {
        handler: (newValue) => {
          console.log({ newValue });
        },
        deep: true
      }

Answer 1

https://ru.vuejs.org/v2/guide/reactivity.html#%D0%...
Or switch to vue 3