console 命令行工具 X clear

console

var app = new Vue({
  el: '#app',
  data: {
    message: 'Hello Vue!',
    obj:{
       
    }
  },
  created(){
      console.log('create');
      this.obj.name = 2;
  },
  methods:{
      changeName(){
          this.obj.name = 'changed';
           console.log('changed');
      }
  }
})

<html>
    <head>
        <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    </head>
    <body>
        <div id="app">
        {{ message }}{{obj.name}}
          <input type="button" @click="changeName" value="BTN">
        </div>
      
    </body>
</html>