4 - writable-computed

[LauGM]

<script setup lang="ts">
import { ref, computed } from "vue"

const count = ref(1)
const plusOne = computed({
  get(){
    return count.value + 1;
  },
  set(val){
    count.value += val;
  }
})
/**
 * Make the `plusOne` writable.
 * So that we can get the result `plusOne` to be 3, and `count` to be 2.
*/

plusOne.value=1;

</script>

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