An event bus is used for communication between sibling components,

This is one of the components: qdb_list

clickChange:function(obj){
      Bus.$emit('change',obj);
      this.$router.push({path:'/qdb_change'});
    }

After the click event is triggered, it will jump to the qdb_change component

This is its sibling component: qdb_change

import Bus from '../bus.js'
export default {
    name:'qdb_change',
    data:function(){
      return {
      newname:'',
      newstatus:'',
      newinstruction:'',
      text:'123456'
      }
    },
    created:function(){
      Bus.$on('change',obj=>{
      console.log(obj);
      this.newname=obj.qdb_name;   
      this.newstatus = obj.status;
      this.newinstruction = obj.instruction;
      });
    }
}

All the assignment operations performed on the attributes here are invalid, and the result is still a blank value. How can I make it effective?

Also, every time you click the jump in qdb_list for the first time, console.log(obj) will not come out. Is it because $on did not monitor the event?

But when you click it for the second time, two console.log(obj) will appear. Does it mean that the number of triggers of the Bus.$emit('change',obj) event will continue to accumulate?