全局挂载组件

main.ts

import { createApp } from 'vue';
import App from './App.vue';

import MyComponent from './components/MyComponent.vue';

const app = createApp(App);

app.component('MyComponent', MyComponent);

app.mount('#app');

MyComponent.vue

<script setup lang="ts">
import { ref, reactive } from "vue";

</script>

<template>
    <div>
        我是全局模版
    </div>
</template>

<style scoped>
</style>