vue2 Event Bus Example

var bus = new Vue();

var vueAwesomeCompare = new Vue({
 ... 
 components:{
    'vue-table':{

       // or mounted
       created:function(){
          bus.$on('popState', function(state){
             self.popState(state);
         });
       },
       methods:{
          popState:function(state){
          ...
         }
      }
    }
  ...
  }
 ...
});

window.onpopstate = function(event){
    bus.$emit('popState',event.state);
};

/////////////////////////////////////////////////////////////////////

var vueAwesomeCompare = new Vue({
      components:{
        'vue-table':{
            template:'#vue-table',
            
            props:[''],
            
            data:function(){
                return {
                    items:null,
                    brands:null,
                    brand:null,
                    comparing:false
                }
            },
       }
      ....
  },
});
console.log(vueAwesomeCompare.$data); //== Object {__ob__: Observer}
console.log(vueAwesomeCompare.$data.brand); //== undefined
console.log(vueAwesomeCompare.brand); //== undefined

/////////////////////////////////////////////////////////////////////

var bus = new Vue();

var vueAwesomeCompare = new Vue({
 ... 
 components:{
    'vue-table':{
       created:function(){
          bus.$on('popState', function(state){
             self.popState(state);
         });
       },
       methods:{
          popState:function(state){
          ...
         }
      }
    }
  ...
  }
 ...
});

window.onpopstate = function(event){
    bus.$emit('popState',event.state);
};

/////////////////////////////////////////////////////////////////////

export default {
      data () {
          return {
              title: '我的',
              headerInfo: []
          }
      },
      mounted: function () {
          this.$bus.on('getMessageCount', this.setMessageCount);
          this.$bus.on('setCenterHeader', this.setCenterHeader);
      },
      methods: {
          setMessageCount: function (params) {
              document.querySelector('.my_message').setAttribute('data-count', params.num)
          },
          setCenterHeader: function (params) {
              this.$set(this.$data, 'title', params.title)// 改变数据并且更新视图
              this.$set(this.$data, 'headerInfo', params)
          }
      }
  }

export default{
    data () {
        return {
            listData: [],
            loading: false,
            currentPageCount: 1,
            pageCount: 0
        }
    },
    mounted: function () {
        this.$bus.emit('setCenterHeader', {title: '消息中心', left: {className: 'back', href: ''}, 'right': {hide: true}})
    }
}