//這是父組件,Father.vue
<template>
  <div class="father">
    <!-- 父組件向子組件傳遞person對象 -->
    <Son :person="person"/>
  </div>
</template>
<script>
export default {
    data (){
        return {
            person:{name:'張三',age:18,sex:'男'}
        }
    }
}
</script>

//這是子組件,Son.vue
<template>
  <div class="son">
      <h2>我是子組件</h2>
      <div>
        <h4>個人信息展示</h4>
		<ul>
            <li><label>姓名:</label><span>{{person.name}}</span></li>
            <li><label>年齡:</label><span>{{person.age}}</span></li>
            <li><label>性別:</label><span>{{person.sex}}</span></li>
        </ul>
      </div>
  </div>
</template>
<script>
export default {
  //子組件通過props接收父組件傳遞過來的數(shù)據(jù)
  props:['person']
}
</script>

//父組件 父組件傳遞了 company-name
<Son company-name = "Microsoft"></Son>
//子組件 子組件接收時的寫法
<script>
export default {
    props:['companyName']
}
</script>

props:['name','age','sex']

props:{
    name:{
        type:String,
        required:true,
        default:''
    },
    age:{
        type:Number,
        required:true,
        default:0
    },
    sex:String
}

<Son :categoryList="categoryList"></Son>
<script>
export default {
	data (){
        return {
            //購物車列表數(shù)據(jù)
            categoryList:[]
        }
    }        
}
</script>

//子組件 Son.vue
<template>
  <div class="son">
    <button @click="sendMsgForFather">發(fā)送信息</button>
  </div>
</template>
<script>
export default {
  props:['getSonMessage'],
  methods:{
    sendMsgForFather(){
      this.getSonMessage(`我是子組件,你好啊`)
    }
  }
}
</script>

//父組件 Father.vue
<template>
  <div class="father">
    <h1>我是父組件</h1>
    <Son :getSonMessage="getSonMessage"/>
  </div>
</template>
<script>
import Son from '@/components/Son.vue'
export default {
  components : {
    Son
  },
  methods:{
    getSonMessage(msg){
      console.log(`我收到了子組件傳遞過來的信息:${msg}`);
    }
  }
}
</script>

//子組件 Son.vue
<template>
  <div class="son">
    <button @click="sendMsgForFather">發(fā)送信息</button>
  </div>
</template>
<script>
export default {
  props:['getSonMessage'],
  methods:{
    //發(fā)送信息給父組件
    sendMsgForFather(){
      this.$emit('eventN',`我是子組件,hello`)
    }
  }
}
</script>

//父組件 Father.vue
<template>
  <div class="father">
    <h1>我是父組件</h1>
    <Son @eventN="demo"/>
  </div>
</template>
<script>
import Son from '@/components/Son.vue'
export default {
  components : {
    Son
  },
  methods:{
    demo(msg){
      console.log(`觸發(fā)了demo函數(shù),${msg}`);
    }
  }
}
</script>

//main.js中安裝全局事件總線
new Vue({
  render: h => h(App),
  beforeCreate(){
    Vue.prototype.$bus = this //安裝全局事件總線
  }
}).$mount('#app')

//消息發(fā)送方 SendCom.vue
<template>
  <div class="send-container">
    <!-- SendCom 向組件 GetMsg 發(fā)送信息，通過$emit觸發(fā)自定義事件-->
    <button @click="sendMsg">發(fā)送消息</button>
  </div>
</template>
<script>
export default {
  methods:{
    sendMsg(){
      this.$bus.$emit('eventB','hello')
    }
  }
}
</script>

//消息接收方 GetMsg.vue
<template>
  <div class="get-msg-container">
  </div>
</template>
<script>
export default {
  mounted() {
    console.log(this);
    this.$bus.$on('eventB', (data) => {
      console.log(`我是事件接受方Demo2,我收到了數(shù)據(jù)${data}`);
    });
  },
  beforeDestroy() {
    this.$bus.$off('eventB') //在使用完后將事件解綁
  }
};
</script>

//消息訂閱者(接收方) Subscribe.vue
<template>
  <div class="subscribe">
  </div>
</template>
<script>
import pubsub from 'pubsub-js'
export default {
    mounted(){
        this.pubId = pubsub.subscribe('message',(msgName,data)=>{
            console.log(`我收到了消息${msgName},內(nèi)容是${data}`);
        })
    },
    beforeDestroy(){
        pubsub.unsubscribe(this.pubId)
    }
}
</script

//消息發(fā)布者(發(fā)送方) Publish.vue
<template>
  <div class="publish">
      <button @click="sendMsg">點擊發(fā)送</button>
  </div>
</template>
<script>
import pubsub from 'pubsub-js'
export default {
    methods:{
        sendMsg(){
            pubsub.publish('message','這是訂閱的消息')
        }
    }
}
</script>