vue2和vue3配置全局自定义参数及vue3动态绑定ref

在 Vue2.x 中我们可以通过 Vue.prototype 添加全局属性 property。但是在 Vue3.x 中需要将 Vue.prototype 替换为 config.globalProperties 配置：

// Vue2.x
Vue.prototype.$api = axios;
Vue.prototype.$eventBus = eventBus;

// Vue3.x
const app = createApp({})
app.config.globalProperties.$api = axios;
app.config.globalProperties.$eventBus = eventBus;

使用时需要先通过 vue 提供的 getCurrentInstance方法获取实例对象：

// A.vue

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

onMounted(() => {
  const instance = <any>getCurrentInstance();
  const { $api, $eventBus } = instance.appContext.config.globalProperties;
  // do something
})
</script>

 vue3动态绑定ref

<div v-for="element in childApp" :key="element.key" class="appWrap" :ref="setChildAppRef">
  {{element.content}}
</div>

<script setup>
let childAppRefs = []
let childApp = computed(() => store.state.childApp)
const setChildAppRef = (el) => {
  if (el) {
    childAppRefs.push(el)
  }
}
</script>