错误实例 (没采用单向数据流)

父组件 : 
<template>
  <div>
      父组件 : {{data.name}} - {{data.age}} - {{data.hight}}
      <hr>
      <Hello :data="data"></Hello>
  </div>
</template>

<script>
import Hello from './components/Hello.vue'
import {reactive} from 'vue'
export default {
  components:{
    Hello
  },
  setup(){
    const data = reactive({
      name:'吴宇腾',
      age:39,
      hight:1.88
    })

    return {
      data
    }
  }
}
</script>

<template>
  <div>
    子组件 : {{data.name}} - {{data.age}} - {{data.hight}}
    <br>
    <button @click="data.name = '杨浩楠' ,data.age++">错误师范,不知道单向数据流,直接修改传递过来的值</button>
  </div>

</template>

<script>
export default {
    name:'Hello',
    props:['data'],
    setup(props,context){
        
    }
}
</script>

<style>

</style>