vue3改变全局数据

需要将数据设置为响应式 

//main.js

import { createApp, ref, provide } from 'vue'

import App from "./App.vue"

const app = createApp(App)

app.mount('#app')
app.provide('GlobalData',ref('全局数据'))

组件中修改：

<script setup>
import { provide,inject } from 'vue'

let GlobalData = inject('GlobalData')

GlobalData.value = '修改数据'
<script>

成功修改！！