vue 3 computed getter setter

const count = ref(1)
const plusOne = computed({
  get: () => count.value + 1,
  set: val => {
    count.value = val - 1
  }
})

plusOne.value = 1
console.log(count.value) // 0

<script setup>
import { computed } from 'vue'
import { useStore } from 'vuex'
const store = useStore()

const email = computed({
    get() {
      return store.state.email
    },
    set(value) {
      store.commit("setEmail", value)
    }
})
</script>

<template>
    <input type="email" v-model="email" />
</template>