Vue组件间的通信pubsub-js实现步骤解析

mounted(){ // 执行异常代码
 // 订阅消息
 PubSub.subscribe('deleteTodo',(msg,index)=>{
  this.deleteTodo(index) // 调用deleteTodo方法执行真正的业务逻辑
 });
},

<script>
 import PubSub from 'pubsub-js'
 export default{
  methods: {
   handlerEnter(isEnter){
    if (isEnter) {
     this.bgColor = 'gray';
     this.isShow = true;
    } else {
     this.bgColor = 'white';
     this.isShow = false;
    }
   },
   deleteItem(){
    // 表示从this对象中取出todo,index,deleteTodo三个对象
    const {todo, index, deleteTodo} = this
    if (window.confirm(`确认删除${todo.title}吗？`)) {
     // 发布消息
     PubSub.publish('deleteTodo', index); //deleteTodo一定要与订阅方名称一样，index是通信的具体数据
 
    }
 
   }
  }
 }
</script>