子组件Content向App.vue通工自定义事件传值

  • App.vue

    <script>import Content from "./components/Content.vue";export default {  data() {    return {      message: '',    };  },  methods:{    getChildMsg:function (value){      console.log(value);      this.message=value    }  },  components:{    Content  }}</script><template><div>  <!--拿到子组件 Content 的msg数据 -->  <!--在父组件通过v-on监听自定义的子组件的自定义事件 -->  <Content @injectMsg="getChildMsg"> </Content>  <h2>{{message}}</h2></div></template>
  • Content.vue
<template>  <div>    <!--组件是能够复用 -->    <Hello_kugou :message="msg" :static='56'></Hello_kugou>    <h3>{{msg}}</h3>    <button @click="msg='酷狗'"> chagebut</button>    <button @click="sendParent">提交数据给父组件</button>  </div></template><script>const obj={  msg:"hello---kugou"}import Hello_kugou from "./Hello_kugou.vue";export default {  data(){//让每一个组件对象都返回一个对象,不对数据净化    return{      msg: 'hellokugoumsg',      list: [1,2,3]    };  },  components:{    Hello_kugou  },  methods:{    // 在子组件理  $emit 触发事件    sendParent:function (){      //this.$emit('事件名称', '发送的事件参数')      this.$emit('injectMsg', this.msg)    }  },  name: "Content"}</script><style scoped></style>
  • Hello_kugou.vue
<template>  <div>    <h2>hello kugou</h2>    <h2>{{message2}}--调用父组件的变量</h2>  </div></template><script>export default {  name: "Hello_kugou",  //props: ['message', 'static']  props:{    // message: String,//类型限度    // static: String    message2:{      type:String,      default:"nihhaokugou",      //required:true    },  }}</script><style scoped></style>