vue3.0如何在全局挂载对象和方法

import { createApp } from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'
const vm = createApp()
let c=()=>{
    console.log(1)
};
vm.config.globalProperties.$http =c;
vm.use(store).use(router).use(c).mount('#app');

this.$http

Vue.prototype.$http = http
//在对应的组件中使用
this.$http
//这种写法相信小火们很熟悉了,那么在vue3中怎么写呢?

// 全局挂载
const app = createApp(App)
app.config.globalProperties.$Methods = Methods;

//在对应的组件中使用
import {
  defineComponent,
  ref,
  getCurrentInstance,
  onMounted,
  reactive,
} from "vue";
//因为vue3是组合API,所以要引入对应的(getCurrentInstance)

// setup
//一个json数组去重
const { proxy }: any = getCurrentInstance();//关键代码
    const $Methods = proxy.$Methods;//关键代码
    const jsonarrreduce = reactive([
      { id: "1", name: "李白" },
      { id: "2", name: "杜甫" },
      { id: "3", name: "白居易" },
      { id: "4", name: "项羽" },
      { id: "5", name: "小米" },
      { id: "1", name: "红米" },
      { id: "1", name: "诺基亚" },
      { id: "2", name: "真我" },
    ]);
    onMounted(() => {
      console.log($Methods.JsonArrReduce(jsonarrreduce, "id"));
    });