vue 属性拦截实现双向绑定的实例代码

let obj = {}
let get = ''
Object.defineProperty(obj, 'get', {
 set: function(val) {
 document.getElementById('input').value = val
 document.getElementById('text').innerHTML = val
 }
})
document.getElementById('input').addEventListener('keyup', function(e) {
 obj.get = e.target.value
})
obj.get = 'hello'

  <div id="root">
    <div v-bind:title=" 'dear jin,' + title">hello world</div>
  </div>
  <script>
    new Vue({
      el: "#root",
      data: {
        title: 'this is hello world'
      },
      methods: {
      }
    })
  </script>

  <div id="root">
    <input type="text" v-model="content" />
    <div>{{content}}</div>
  </div>
  <script>
    new Vue({
      el: "#root",
      data: {
        content: "this is content"
      },
      methods: {

      }
    })
  </script>