<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <script src="./vue.js"></script> </head> <body> <div id="app"> {{fullName}} </div> <script> var vm=new Vue({ el:'#app', data:{ firstName:"Dell", lastName:"Lee" }, computed:{ fullName:{ get:function(){ return this.firstName+" "+this.lastName }, set:function(value){ var arr=value.split(" "); this.firstName=arr[0]; this.lastName=arr[1]; } } } }) </script> </html>