更新Vue.js中的嵌套父类

<template>
  <div>
    <child-component :childData="parentData"></child-component>
  </div>
</template>

<script>
import ChildComponent from './ChildComponent.vue';

export default {
  components: {
    ChildComponent
  },
  data() {
    return {
      parentData: '父组件的数据'
    };
  }
};
</script>

<template>
  <div>
    <p>{{ childData }}</p>
    <button @click="updateParentData">更新父组件数据</button>
  </div>
</template>

<script>
export default {
  props: ['childData'],
  methods: {
    updateParentData() {
      this.childData = '修改后的父组件数据';
    }
  }
};
</script>