Vue3在setup组合式API中使用全局挂载的属性详解

//在main.js文件
import  Vue  from 'vue';
import axios from 'axios';
Vue.prototype.$axios = axios;

//在其它组件使用，直接用this调用
this.$axios

import { createApp } from 'vue'
import App from './App.vue'
import * as echarts from 'echarts';
let app = createApp(App);

// 全局挂载echarts
app.provide('$echarts',echarts);

app.mount('#app')

<script setup>
import { inject, onMounted } from "vue";

//导入挂载的echarts 
const echarts = inject("$echarts");

onMounted(() => {
    let myChart = echarts.init(document.getElementById('main'));
    console.log(myChart);
});
</script>

//vue3 main.js文件
import { createApp } from 'vue'
import App from './App.vue'
import * as echarts from 'echarts';

let app = createApp(App);
//全局挂载echarts属性
app.config.globalProperties.$echarts = echarts;
app.mount('#app')

<script setup>
  import { getCurrentInstance } from 'vue'
 const { proxy } = getCurrentInstance();
 //调用
 proxy.echarts
</script>