4 - 可写的计算属性

[PoliWen]

// 父组件 App.vue
<script setup>
import {ref,computed} from "vue"
const count = ref(1)
const plusOne = computed({
    get(){
        return count.value + 1
    },
    set(value){
        // count.value = value - 1
        count.value++
    }
})
plusOne.value++
</script>

<template>
  <div>
    <p>{{ count }}</p>
    <p>{{ plusOne }}</p>
  </div>
</template>