Vue3 props

【props】

// 定义一个接口，限制每个Person对象的格式
export interface PersonInter {
 id:string,
 name:string,
    age:number
   }

// 定义一个自定义类型Persons
export type Persons = Array<PersonInter>

App.vue中代码：

<template>
    <Person :list="persons"/>
</template>

<script lang="ts" setup name="App">
  import Person from './components/Person.vue'
  import {reactive} from 'vue'
    import {type Persons} from './types'

    let persons = reactive<Persons>([
     {id:'e98219e12',name:'张三',age:18},
      {id:'e98219e13',name:'李四',age:19},
       {id:'e98219e14',name:'王五',age:20}
     ])
   </script>

Person.vue中代码：

<template>
<div class="person">
 <ul>
     <li v-for="item in list" :key="item.id">
        {{item.name}}--{{item.age}}
      </li>
    </ul>
   </div>
   </template>

<script lang="ts" setup name="Person">
import {defineProps} from 'vue'
import {type PersonInter} from '@/types'

  // 第一种写法：仅接收
// const props = defineProps(['list'])

  // 第二种写法：接收+限制类型
// defineProps<{list:Persons}>()

  // 第三种写法：接收+限制类型+指定默认值+限制必要性
let props = withDefaults(defineProps<{list?:Persons}>(),{
     list:()=>[{id:'asdasg01',name:'小猪佩奇',age:18}]
  })
   console.log(props)
  </script>