基于Vue3+TypeScript的全局对象的注入和使用详解

Vue.prototype.getToken = getToken
    Vue.prototype.guid = guid
    Vue.prototype.isEmpty = isEmpty

// 提示成功信息
    Vue.prototype.msgSuccess = function(msg) {
      this.$message({ showClose: true, message: msg, type: 'success' })
    }
    // 提示警告信息
    Vue.prototype.msgWarning = function(msg) {
      this.$message({ showClose: true, message: msg, type: 'warning' })
    }
    // 提示错误信息
    Vue.prototype.msgError = function(msg) {
      this.$message({ showClose: true, message: msg, type: 'error' })
    }

// 导入一些全局函数
import prototype from './prototype'
Vue.use(prototype)

import { ComponentInternalInstance, getCurrentInstance } from 'vue'

//获取默认的全局自定义属性
export default function useCurrentInstance() {
  const { appContext } = getCurrentInstance() as ComponentInternalInstance
  const proxy = appContext.config.globalProperties
  return {
    proxy
  }
}

<script setup lang="ts">
import useCurrentInstance from '/@/utils/useCurrentInstance' //使用常规方式获取对象
const { proxy } = useCurrentInstance();
let $u = proxy.$u as $u_interface;

//挂载的时候初始化数据
onMounted(async () => {
  console.log($u.success('abcdefa'));
  console.log($u.util.guid());
});

import { ComponentInternalInstance, getCurrentInstance } from 'vue'

//直接获得注入的对应的$u实例
export function $user() {
  const { appContext } = getCurrentInstance() as ComponentInternalInstance
  const proxy = appContext.config.globalProperties;
  const $u = proxy.$u as $u_interface;
  return $u;
}

import { $user } from '/@/utils/useCurrentInstance' //使用简便模式获取注入全局变量$u
let $u = $user();//实例化

// 显示编辑对话框
function showEdit(id) {
  if ($u.test.isEmpty(id)) {
    $u.warn("请选择编辑的记录!");
    return;
  }
  emit('showEdit', id)
}

 app.use($u);//挂载自定义的一些变量辅助类

//定义自定义类$u的接口类型
interface message_interface {
  Message(message: string): any;
  success(message: string): any;
  warn(message: string): any;
  error(message: string): any;
  confirm(message = '您确认删除选定的记录吗?'): Promise<any>;
};