vue3+TS中子组件怎么向父组件传值

第一种：
 

<!-- 子组件 -->

<el-dialog
            v-model="visible"
            left
            :close-on-click-modal="false"
            :show-close="true"
            width="900"
            :before-close="handleClose"
        >
</el-dialog>

const selfEmit = defineEmits(['update:modelValue','send-data'])

const props = defineProps<{ 
    title: string
    type: string
    modelValue: boolean
}>()

const visible = ref(false) // 弹框显示

watch(() => props.modelValue, (newValue) => {
    visible.value = newValue
})

const handleCurrentChange = (val: any) => {
    selectedValue.value = val
}

const confirm = () => {
    if(!selectedValue.value ){
        return ElMessage.error('请点击表格，选择接口信息！')
    }
   selfEmit('send-data',selectedValue.value)
    selfEmit('update:modelValue', false)
}

<!-- 父组件 -->
<interfaceAndTarget v-model="displayInfo" :type="boxType" :title="title" @send-data="sendData"></interfaceAndTarget>

const title = ref('') 
const boxType = ref('0')
const displayInfo = ref(false)

const sendData = (data:any) => {
    console.log('6666',data)
}

第二种：

<!-- 子组件 -->
<el-dialog
            v-model="visible"
            left
            :close-on-click-modal="false"
            :show-close="true"
            width="900"
            :before-close="handleClose"
        >
</el-dialog>

const selfEmit = defineEmits(['update:modelValue'])
const props = defineProps<{
    title: string
    type: string
    modelValue: boolean
    sendData:Function
}>()

const visible = ref(false) 

watch(() => props.modelValue, (newValue) => {
    visible.value = newValue
})

const handleCurrentChange = (val: any) => {
    selectedValue.value = val
}

const confirm = () => {
    if(!selectedValue.value ){
        return ElMessage.error('请点击信息！')
    }
    props.sendData(selectedValue.value)
    selfEmit('update:modelValue', false)
}

<!-- 父组件 -->

<interfaceAndTarget v-model="displayInfo" :type="boxType" :title="title" :sendData="sendData"></interfaceAndTarget>

const title = ref('') 
const boxType = ref('0')
const displayInfo = ref(false)

const sendData = (data:any) => {
    console.log('6666',data)
}