<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>简易计算器</title> <script src="./lib/vue.js"></script> </head> <body> <div id="app"> <input type="text" v-model="num1"> <select v-model="opt"> <option value="+">+</option> <option value="-">-</option> <option value="*">*</option> <option value="/">/</option> </select> <input type="text" v-model="num2"> <input type="button" value="=" @click="cal"> <input type="text" v-model="result"> </div> <script> var vm = new Vue({ el:"#app", data:{ num1:0, num2:0, result:0, opt:"+" }, methods:{ cal(){ switch (this.opt) { case "+": this.result = parseInt(this.num1) + parseInt(this.num2) break; case "-": this.result = parseInt(this.num1) - parseInt(this.num2) break; case "*": this.result = parseInt(this.num1) * parseInt(this.num2) break; case "/": this.result = parseInt(this.num1) / parseInt(this.num2) break; } } } }) </script> </body> </html>