<div id="test">
  name:{{name}}
  age:{{age}}
</div>
<script>
  let el = document.getElementById('test');
  let datainner = {
    name:"Jack",
    age:"18"
  }
  let template = el.innerHTML;
  let data = new Proxy(datainner,{
    set(obj,name,value){
      console.log(name+"的值被操纵成了value"+value)
      obj[name]=value;
      console.log("数据改变了");
      render()
    }
  })
  data.name="Jack Chen"
</script>

 <script>
  let el = document.getElementById('test');
  let datainner = {
    name:"Jack",
    age:"18"
  }
  let template = el.innerHTML;
  let data = new Proxy(datainner,{
    set(obj,name,value){
      console.log(name+"的值被操纵成了"+value)
      obj[name]=value;
      console.log("数据改变了");
      render();
    }
  })
  render();
  //数据渲染
  function render(){
    el.innerHTML = template.replace(/\{\{\w+\}\}/g,str=>{
      str=str.substring(2,str.length-2);
      console.log(datainner[str]);
      return datainner[str]
    })
  }
</script>