<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> </head> <body> <div> <!-- 验证码输入框 --> <input type="text" v-model="aaa" @blur="checkNum" /> <!-- 验证码切换按钮 --> <input type="button" v-model="bbb" @click="createCode"/> <!-- 提示信息 --> <span type="text">{{ ccc }}</span> </div> </body> <!-- import Vue before Element --> <script src="https://cdn.bootcss.com/vue/2.4.4/vue.min.js"></script> <script> new Vue({ el: '#app', data: function() { return { aaa:"", bbb:"", ccc:"提示信息" } }, created(){ this.createCode();//初始化生成一个4位数的验证码 }, methods: { createCode(){ var code = ""; var codeLength = 4;//验证码的长度 var random = new Array(0,1,2,3,4,5,6,7,8,9,'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R', 'S','T','U','V','W','X','Y','Z');//随机数 for(var i = 0; i < codeLength; i++) { //循环操作 var index = Math.floor(Math.random()*36);//取得随机数的索引（0~35） code += random[index];//根据索引取得随机数加到code上 } this.bbb = code;//把code值赋给验证码 }, checkNum(){ var num = this.aaa.toUpperCase();//输入内容全部转化为大写 if(num == this.bbb){ this.ccc = "验证码正确"; }else{ this.ccc = "验证码错误"; this.createCode(); } } } }) </script> </html>
使用在线HTML/CSS/JavaScript代码运行工具：运行上述代码，可得到如下运行结果：
