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<html>
<head>
   <meta charset="UTF-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <title>Vue</title>
   <script src="https://www.hxstrive.com/cdn/libs/vue/2.7.16/vue.min.js"></script>
</head>
<body>

<div id="app">
       <h1>title: {{ obj.title }}, summary: {{ obj.summary }}</h1>
       
       <my-component v-bind.sync="obj"></my-component>
   </div>

<script type="text/javascript">
       Vue.component('my-component', {
           data: function(){
               return {
                   title2: this.$attrs.title,
                   summary2: this.$attrs.summary
               };
           },
           template: `
               <div>
                   <p>
                       <input type="text" placeholder="Enter title" v-model="title2" />
                   </p>
                   <p>
                       <input type="text" placeholder="Enter summary" v-model="summary2" />
                   </p>
                   <p>
                       <button v-on:click="sendData">Send Data</button>
                   </p>
               </div>
           `,
           methods: {
               sendData: function(){
                   this.$emit('update:title', this.title2);
                   this.$emit('update:summary', this.summary2);
               }
           }
       });

var app = new Vue({
           el: "#app",
           data: {
               obj: {
                   title: "TITLE",
                   summary: "SUMMARY"
               }
           }
       });
   </script>

</body>
</html>

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