Vue3中setup函数如何进行组间通讯

<template>
  <children :list="list"></children>
  <div>
    <input v-model="value" type="text" placeholder="请输入" />
    <button @click="handleAdd"> 添加 </button>
  </div>
</template>
<script setup>
  import { ref } from 'vue'
  import Children from '@/views/parentChildCommunicat/parentToChildren/components/children.vue'
  const list = ref(['JavaScript', 'HTML', 'CSS'])
  const value = ref('')
  const handleAdd = () => {
    list.value.push(value.value)
    value.value = ''
  }
</script>

<template>
  <ul>
    <li v-for="item in props.list" :key="item">{{ item }}</li>
  </ul>
</template>
<script setup>
  import { defineProps } from 'vue'
  const props = defineProps({
    list: {
      type: Array,
      default: () => []
    }
  })
</script>

<template>
  <div>
    <input v-model="value" type="text" placeholder="请输入" />
    <button @click="handleAdd"> 添加 </button>
  </div>
</template>
<script setup>
  import { ref, defineEmits } from 'vue'
  const value = ref('')
  const emits = defineEmits(['add'])
  const handleAdd = () => {
    emits('add', value.value)
    value.value = ''
  }
</script>

<template>
  <ul>
    <li v-for="item in list" :key="item">{{ item }}</li>
  </ul>
  <son @add="add" />
</template>
<script setup>
  import { ref } from 'vue'
  import Son from './components/son.vue'
  const list = ref(['JavaScript', 'HTML', 'CSS'])
  const add = (value) => {
    list.value.push(value)
  }
</script>

<template>
  <div>
    <input v-model="value" type="text" placeholder="请输入" />
    <button @click="handleAdd"> 添加 </button>
  </div>
</template>
<script setup>
  import { ref, defineEmits, defineProps } from 'vue'
  const value = ref('')
  const props = defineProps({
    list: {
      type: Array,
      default: () => []
    }
  })
  const emits = defineEmits(['update:list'])
  const handleAdd = () => {
    const arr = props.list
    arr.push(value.value)
    emits('update:list', arr)
    value.value = ''
  }
</script>

<template>
  <ul>
    <li v-for="i in list" :key="i">{{ i }}</li>
  </ul>
  <child-components v-model:list="list" />
</template>
<script setup>
  import { ref } from 'vue'
  import ChildComponents from './components/child-components.vue'
  const list = ref(['JavaScript', 'HTML', 'CSS'])
</script>