## 实例 ``` <div id="app"> {{fullName}} </div> <script> var vm = new Vue({ el: '#app', data: { firstName: 'richard', lastName: 'li', }, computed: { fullName: { //取属性值的时候被执行 get: function () { return this.firstName + ' ' + this.lastName; }, //设置属性值的时候被执行 set: function (value) { var arr = value.split(''); this.firstName = arr[0]; this.lastName = arr[1]; console.log(value); } } } }) </script> ```