jQuery validdate插件的使用

跟着书上的例子做的时候发现很奇怪，在script标签中用message重写提示消息，没有反应，不知道是不是引入的metadata.js文件有问题，于是用了菜鸟教程的cdn和教程，魔改了一下

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>jquery-validation-demo</title>
<script src="http://static.runoob.com/assets/jquery-validation-1.14.0/lib/jquery.js"></script>
<script src="http://static.runoob.com/assets/jquery-validation-1.14.0/dist/jquery.validate.min.js"></script>
<script src="messages_zh_cn.js"></script>
<script src="http://malsup.github.io/jquery.form.js"></script>
<script>

$().ready(function() {
// 在键盘按下并释放及提交后验证提交表单
  $("#signupForm").validate({
        rules: {
          firstname: "required",
          lastname: "required",
          username: {
            required: true,
            minlength: 6
          },
          password: {
            required: true,
            minlength: 5
          },
          confirm_password: {
            required: true,
            minlength: 5,
            equalTo: "#password"
          },
          email: {
            required: true,
            email: true
          },
          "topic[]": {
            required: "#newsletter:checked",
            minlength: 2
          },
        agree: "required",
        vercode:{
          formula:"7+9",
        }
        },
        messages: {
          firstname: "请输入您的名字",
          lastname: "请输入您的姓氏",
          username: {
            required: "请输入用户名",
            minlength: "用户名长度不能小于{0}个字符"
          },
          password: {
            required: "请输入密码",
            minlength: "密码长度不能小于 {0} 个字母"
          },
          confirm_password: {
            required: "请输入密码",
            minlength: "密码长度不能小于{0}个字母",
            equalTo: "两次密码输入不一致"
          },
          email: "请输入一个正确的邮箱",
          agree: "请接受我们的声明",
          topic: "请选择两个主题"
        },
    errorElement:"em",
    success:function(label){
      //label指向上面那个错误信息提示标签，没指定就默认是label
      // console.log(label.parent()[0].childNodes[3].getAttribute("type"));
      console.log(label[0].parentNode.childNodes[3].getAttribute("type"));
      // var forLabel = label.parent()[0].childNodes[1].getAttribute("for");
      var btnSuccess = label[0].parentNode.childNodes[3].getAttribute("type");
      if(btnSuccess !== "checkbox"){
        label.text("符合格式要求~")
           .addClass("success");
      }else{
        label.removeClass("error");
      }
    }
    });
    $("#newsletter").click(function(){
        var isChecked = $("#newsletter").prop("checked");
        if(isChecked){
            $("#newsletter_topics").show();
        }else{
            $("#newsletter_topics").hide();
        }
    });
    $.validator.addMethod(
      "formula",//该验证方法的名称，就像required
      function(value,ele,param){//验证规则
        return value == eval(param);
      },
      '请正确输入数学公式计算后的结果！'//验证的提示信息
    );
});
</script>
<style>
.error{
    color:red;
}
em.error{
    color: orangered;
    background: url(error.png) no-repeat;
    background-size: contain;
    padding-left: 21px;
}
em.success{
    color: skyblue;
    background: url("correct (1).png") no-repeat;
    background-size: contain;
    padding-left: 21px;
}
</style>
</head>
<body>
<form class="cmxform" id="signupForm" method="get" action="">
  <fieldset>
    <legend>验证完整的表单</legend>
    <p>
      <label for="firstname">名字</label>
      <input id="firstname" name="firstname" type="text">
    </p>
    <p>
      <label for="lastname">姓氏</label>
      <input id="lastname" name="lastname" type="text">
    </p>
    <p>
      <label for="username">用户名</label>
      <input id="username" name="username" type="text">
    </p>
    <p>
      <label for="password">密码</label>
      <input id="password" name="password" type="password">
    </p>
    <p>
      <label for="confirm_password">验证密码</label>
      <input id="confirm_password" name="confirm_password" type="password">
    </p>
    <p>
      <label for="vercode">验证码</label>
      <input id="vercode" name="vercode" type="password">
    </p>
    <p>
      <label for="email">Email</label>
      <input id="email" name="email" type="email">
    </p>
    <p>
      <label for="agree">请同意我们的声明</label>
      <input type="checkbox" class="checkbox" id="agree" name="agree">
    </p>
    <p>
      <label for="newsletter">我乐意接收新信息</label>
      <input type="checkbox" class="checkbox" id="newsletter" name="newsletter">
    </p>
    <fieldset style="display:none;" id="newsletter_topics">
      <legend>主题 (至少选择两个) - 注意：如果没有勾选“我乐意接收新信息”以下选项会隐藏，但我们这里作为演示让它可见</legend>
      <label for="topic_marketflash">
        <input type="checkbox" id="topic_marketflash" value="marketflash" name="topic[]">Marketflash
      </label>
      <label for="topic_fuzz">
        <input type="checkbox" id="topic_fuzz" value="fuzz" name="topic[]">Latest fuzz
      </label>
      <label for="topic_digester">
        <input type="checkbox" id="topic_digester" value="digester" name="topic[]">Mailing list digester
      </label>
      <label for="topic" class="error" style="display:none">至少选择两个</label>
    </fieldset>
    <p>
      <input class="submit" type="submit" value="提交">
    </p>
  </fieldset>
</form>
</body>
</html>

在success中有点闲的将按钮和输入框的确认样式分开了，因为觉得吧，按钮也用“符合格式”有点奇怪

再过几天开始学Vue.js辣！之前一直不敢碰，感觉基础不牢学的会很慢，现在至少有入门的感觉了~