Vue 消息订阅与发布 (任意组件间通信)

import PubSub from 'pubsub-js'
Vue.prototype.$pubsub = PubSub

methods: {
        login()
        { 
            this.$pubsub.publish('getUserId', '13169463709')
        }
     }

created() { 
       this.$pubsub.subscribe('getUserId', (funName,user_id) => {
// this.$pubsub.subscribe('getUserId', (_,user_id) => {
//消息名可以使用_占位
                console.log(user_id)
        })
    },
     beforeDestroy() { 
        this.$pubsub.unsubscribe(this.$pubsub)
  //销毁
    }