解决vue自定义全局消息框组件问题

<template>
 <transition name="fade"> <!--这个是动画的过渡效果-->
 <div class="message" :class="type" v-if="visible">
  <div class="content">
  <i class="icon-type iconfont" :class="'icon-'+type"></i>
  {{content}}
  <i v-if="hasClose" class="btn-close iconfont icon-close" @click="visible=false"></i>
  </div>
 </div>
 </transition>
</template>
 
<script>
export default {
 name: 'Message.vue',
 data () {
 return {
  content: '',
  time: 3000,
  visible: false,
  type: 'info', // 'info','warning','error','success'
  hasClose: false 
 }
 },
 mounted () {
 this.close()
 },
 methods: {
 close () {
  window.setTimeout(() => {
  this.visible = false
  }, this.time)
 }
 }
}
</script>
 
<style scoped lang="scss">
 /* 动画效果 淡入淡出 */
 .fade-enter-active, .fade-leave-active{
 transition: all 0.5s ease;
 }
 .fade-enter, .fade-leave-active{
 opacity: 0;
 }
 /* 不同的提示语的样式 */
 .info, .icon-info{
 background-color: #DDDDDD;/*#f0f9eb*/
 color: #909399;
 }
 .success, .icon-success{
 background-color:#f0f9eb;
 color: #67C23A;
 }
 .warning, .icon-warning{
 background-color: #fdf6ec;
 color: #e6a23c;
 }
 .error, .icon-error{
 background-color: #fef0f0;
 color: #f56c6c;
 }
 .message {
 position: fixed;
 left: 50%;
 top: 10%;
 transform: translate(-50%, -50%);
 width:300px;
 height:30px;
 line-height: 30px;
 font-size: 16px;
 padding: 10px;
 border-radius: 5px;
 .content{
  width:100%;
  height:100%;
  text-align:left;
  .icon-type{
  margin:0 10px 0 30px;
  }
  .btn-close{
  font-size:20px;
  margin:0 0 0 70px;
  color:#ccc;
  }
 }
 }
 
</style>

import Vue from 'vue'
import Message from './Message.vue'
 
const MessageBox = Vue.extend(Message)
 
Message.install = function (options, type) {
 if (options === undefined || options === null) {
 options = {
  content: ''
 }
 } else if (typeof options === 'string' || typeof options === 'number') {
 options = {
  content: options
 }
 if (type !== undefined && options !== null) {
  options.type = type
 }
 }
 
 let instance = new MessageBox({
 data: options
 }).$mount()
 
 document.body.appendChild(instance.$el)
 
 Vue.nextTick(() => {
 instance.visible = true
 })
}
 
export default Message

// 在main.js里面全局引入 自定义的全局消息框组件
import Message from './components/message'
Vue.prototype.$my_message = Message.install

this.$my_message('你这个大笨猪吼吼吼！');
this.$my_message('你这个大笨猪吼吼吼！','success');
this.$my_message({
 content:'服务器连接失败！', // 弹出的文字内容
 time:5000,     // 弹出后多久消失
 type:'success',   // 弹出的消息类型
 hasClose:true,   // 让按钮可以被使用，默认按钮是false不可以使用的
 
});