在vue3中没有prototype属性,
定义全局变量或者函数
app.config.globalProperties.name = ' yoga'
模版中直接使用, js中通过getCurrentInstance()
<template>
<div>{{ name }}</div>
</template>
<script setup>
import { ref, reactive, provide, getCurrentInstance } from 'vue'
const instance = getCurrentInstance()
console.log(instance.proxy.name)
</script>
<style scoped></style>