1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title></title> 6 <script src="../vue.js" type="text/javascript" charset="utf-8"></script> 7 </head> 8 <body> 9 <div id="app"> 10 <input type="text" v-model="n1"> 11 <select v-model="opt"> 12 <option value="+">+</option> 13 <option value="-">-</option> 14 <option value="*">*</option> 15 <option value="/">/</option> 16 </select> 17 <input type="text" v-model="n2"> 18 <input type="button" value="=" v-on:click="calca"> 19 <input type="text" v-model="result"> 20 </div> 21 </body> 22 <script type="text/javascript"> 23 var vm = new Vue({ 24 el: "#app", 25 data: { 26 n1: 0, 27 n2: 0, 28 result: 0, 29 opt: "+", 30 }, 31 methods: { 32 calca: function() { 33 // switch (this.opt) { 34 // case "+": 35 // this.result = parseInt(this.n1) + parseInt(this.n2); 36 // break; 37 // case "-": 38 // this.result = parseInt(this.n1) - parseInt(this.n2); 39 // break; 40 // case "*": 41 // this.result = parseInt(this.n1) * parseInt(this.n2); 42 // break; 43 // case "/": 44 // this.result = parseInt(this.n1) / parseInt(this.n2); 45 // break; 46 // } 47 this.result = eval("parseInt(this.n1) " + this.opt + " parseInt(this.n2)"); 48 } 49 } 50 }); 51 </script> 52 </html>
注意：v-model只能用于表单元素
原文：https://www.cnblogs.com/yanghaoyu0624/p/11490402.html