vue-select/docs/digging-deeper/vuex.md

Using the input Event with Vuex

vue-select emits the input event any time the internal value is changed. This is the same event that allow the for the v-model syntax. When using Vuex for state management, you can use the input event to dispatch an action, or trigger a mutation.

<v-select 
    @input="myAction" 
    :options="$store.state.options"
    :value="$store.state.selected"
  ></v-select>