vue 使用element-ui中的Notification自定义按钮并实现关闭功能及如何处理多个通知

import mainTable from './mixin/mainTable';import systemMenu from './template/system-menu';import headerRow from './template/header';export default {  name: 'xxxxx',  data() {    return {      //使用messageId作为弹窗的key，用来获取弹窗的实例，以对对应弹窗进行操作      notifications: {}    };  },  mounted() {    this.$messageWebsocket.websocketApi.initWebSocket(this.$store.state.login.userInfo.userInfo.id, this.openMessageTips);  },  methods: {    //关闭单个通知    closeNotification(id, operateCode, message){      this.notifications[message.messageId].close();      delete this.notifications[message.messageId];    },    //关闭所有通知    closeAllNotification(){      let _this = this;      for (let key in _this.notifications) {        _this.notifications[key].close();        delete _this.notifications[key];      }    },    //打开一个新的通知    openMessageTips(message){      let _this = this;      this.closeAllNotification();      let notify = this.$notify({        title: '三高协诊消息',        position: 'bottom-right',        showClose: false,        dangerouslyUseHTMLString: true,        message: this.$createElement('div', null,          [            this.$createElement('div', null, [this.$createElement('span', null, message.content)]),            this.$createElement('div', null,              [                this.$createElement(                  'button',                  {                    style: {                      padding: '10px 18px',                      margin: '10px 12px 0px 2px',                      textAlign: 'center',                      textDecoration: 'none',                      display: 'inline-block',                      webkitTransitionDuration: '0.4s',                      transitionDuration: '0.4s',                      cursor: 'pointer',                      backgroundColor: 'white',                      color: 'black',                      border: '2px solid #e7e7e7',                    },                    on: {                      mouseout: function(e){                        e.target.style.backgroundColor = 'white';                      },                      mouseover: function(e){                        e.target.style.backgroundColor = '#e7e7e7'                      },                      click: _this.closeNotification.bind(_this, 1, 1, message)                    }                  },                  "查看"                ),                this.$createElement(                  'button',                  {                    style: {                      padding: '10px 18px',                      margin: '10px 2px 0px 12px',                      textAlign: 'center',                      textDecoration: 'none',                      display: 'inline-block',                      webkitTransitionDuration: '0.4s',                      transitionDuration: '0.4s',                      cursor: 'pointer',                      backgroundColor: 'white',                      color: 'black',                      border: '2px solid #e7e7e7',                    },                    on: {                      //鼠标移出的回调                      mouseout: function(e){                        e.target.style.backgroundColor = 'white';                      },                      //鼠标移入的回调                      mouseover: function(e){                        e.target.style.backgroundColor = '#e7e7e7'                      },                      click: _this.closeNotification.bind(_this, 1, 2, message)                    }                  },                  "稍后提醒（五分钟后）"                )              ]            )          ]        ),        duration: 0,      });      //将messageId和通知实例放入字典中      this.notifications[message.messageId] = notify;    }  }};