<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
</head>
<body>
<div id="app">
<!-- 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" style="color: red;">{{ ccc }}</span>
</div>
</body>
<!-- import Vue before Element -->
<script src="https://unpkg.com/vue/dist/vue.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>