<template><div>{{ $env }}<br />{{ $filters.format("的飞机") }}</div>
</template><script setup lang="ts">
import { getCurrentInstance } from "vue";
const app = getCurrentInstance();
console.log(app?.proxy?.$filters.format("dffdfd"));
</script><style></style>

main.ts:

import { createApp } from "vue";
import "./style.css";
import "animate.css";
import App from "./App.vue";
import ElementPlus, { Filter } from "element-plus";
import  mitt  from  'mitt'
import "element-plus/dist/index.css";
import cart from "./components/cart.vue";
import tree from "./components/tree.vue";
import * as ElementPlusIconsVue from "@element-plus/icons-vue";
const app = createApp(App);
for (const [key, component] of Object.entries(ElementPlusIconsVue)) {app.component(key, component);
}const  Mit = mitt();
app.use(ElementPlus);
declare module 'vue' {export interface ComponentCustomProperties{$Bus: typeof Mit,$filters:Filter}
}
type Filter = {format<T>(str:T):string}
app.config.globalProperties.$Bus = Mit;
app.config.globalProperties.$env = "dev";
app.config.globalProperties.$filters = {format<T>(str: T) {return  `小满-${str}`}
};
app.component("cart", cart);
app.component("tree", tree);
app.mount("#app");

效果图：