<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <div id="app"> <!--1.直接拼接:语法过于繁琐--> <h2>{{firstName}} {{lastName}}</h2> <!--2.通过定义methods--> <h2>{{getFullName()}}</h2> <!--3.通过computed--> <h2>{{fullName}}</h2> </div> <script src="../js/vue.js"></script> <script> const app = new Vue({ el: '#app', data: { firstName: 'Kobe', lastName: 'Bryant' }, methods: { getFullName: function () { return this.firstName+' '+this.lastName } }, computed: { fullName: function () { return this.firstName+' '+this.lastName } } }) </script> </body> </html> 在多次循环使用时，methods时会多次调用，而computed只调用一次
