vue3全局指令，报错如何解决？

Question

main.js中设置全局自定义指令，但报Uncaught TypeError: Cannot read properties of undefined (reading 'directive')这个错误
或者说有没有vue3项目使用全局指令的例子，网上很多例子都无法运行。

//main.js
import { createApp } from "vue";
import Vue from 'vue'
import App from "./App.vue";
import router from "./router";
import store from "./store";
import "normalize.css";
import "./style/iconfont.css";
import "./style/base.scss";

Vue.directive("back", {
  mounted(el, binding, vnode) {
    el.addEventListener("click", () => {
      console.log('123');
    });
  },
});
createApp(App).use(store).use(router).mount("#app");

Answer 1

https://staging-cn.vuejs.org/...
vue3是在app里注册