父组件中：

const closeMessageBox = () => {ElMessageBox.close();getList();
};const open = () => {ElMessageBox({title: '添加商品',message: h(AddTaxExemption, { onClose: closeMessageBox }),customClass: 'custom-message-box', showConfirmButton: false,draggable: true,});
};

子组件AddTaxExemption中：

const props = defineProps({onClose: Function
});
props.onClose();