Vue的计算属性和侦听器 · 前端开发

Vue的计算属性和侦听器 ``` <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Vue</title> <script src="https://creative.chat/resources/vue/vue-v2.6.12.js"></script> </head> <body> <div id="root"> 姓：<input v-model="firstName" /> 名：<input v-model="lastName" /> <div>{{fullName}}</div> <div>{{count}}</div> </div> <script> new Vue({ el: "#root", data: { firstName: '', lastName: '', count: 0 }, computed: { fullName: function() { return this.firstName + ' ' + this.lastName } }, watch: { fullName: function() { this.count ++ } } }) </script> </body> </html> ```