[Vue warn]: Failed to resolve directive: ant-portal (found in ＜Anonymous＞)

使用场景：Ant Design Vue 1.75 局部引入 Modal 组件，Vue 2

import { Input, Button, Modal } from 'ant-design-vue';
export default {
  name: "BasicInformationOfUndergraduate",
  components: {
    'a-input': Input,
    'a-button': Button,
    'a-modal': Modal,
  },
  ...

原本和 Input、Button一样的写法引入 但是会报错，解决方案如下：

import Vue from 'vue'
import { Input, Button, Modal } from 'ant-design-vue';
Vue.use(Modal)
export default {
  name: "BasicInformationOfUndergraduate",
  components: {
    'a-input': Input,
    'a-button': Button,
    'a-modal': Modal,
    // 'a-modal': Modal,
  },

增加 import Vue from 'vue' ，Vue.use(Modal)
注释掉 'a-modal': Modal,