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Communication of Vue.js components from the parent component to the child parent component (code)

高洛峰
Release: 2017-03-12 11:34:51
Original
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This article Vue.jsCommunication of the component from the parent component to the child parent component (code)

<!DOCTYPE html>
  <html>
  <head>
    <meta charset="UTF-8">
    <title>componentParentChildCommunication</title>
    <script src="js/vue.js"></script>
  </head>

  <template id="parentComp">
    <p>
      I am parent component:{{msg}},The Data from child:{{msg2}}
      <hr>
      <!-- <child @自定义事件名="父方法"></child> -->
      <child @child="parentFn"></child> 
    </p>
  </template>
  <template id="childComp">
    <p>I am child component:{{msg}}</p>
  </template>
  <body>

  <script>
    let child={
      template:&#39;#childComp&#39;,
      data(){
        return {
          msg:&#39;child Data&#39;
        }
      },
      mounted(){
      /*this.$emit(&#39;自定义事件名&#39;,数据);*/
        this.$emit(&#39;child&#39;,this.msg);
      }
    };

    let parent={
      template:&#39;#parentComp&#39;,
      data(){
        return {
          msg:&#39;parent Data&#39;,
          msg2:&#39;&#39;
        }
      },
      components:{
        child
      },
      methods:{
        parentFn(data){
          this.msg2=data;
        }
      }
    };

    window.onload=function(){ 
      new Vue({
        el:&#39;#app&#39;,
        components:{
          parent
        }
      });
    }
    /*父元素向子元素通信关键总结:
      1:在嵌套的子元素(使用时)上:<child @自定义事件名="父方法"></child>;
      2:子元素在加载完成的钩子函数(mounted)上加一个方法:this.$emit(&#39;自定义事件名&#39;,数据);
      3:父元素上的方法:父方法名(data){...}
    */
  </script>

  <p id="app">
    <parent></parent>
  </p>
  </body>
</html>
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