JQuery 验证工作，但 submitHandler 不是答案

【问题标题】：JQuery Validation Working, but submitHandler is notJQuery 验证工作，但 submitHandler 不是
【发布时间】：2020-04-28 17:34:04
【问题描述】：

我有一个表单我正在尝试使用 JQuery Validate 进行验证，它工作正常。当点击提交按钮时，submitHandler 应该 1. 禁用按钮（防止多次提交）和 2. 更改按钮文本。

按原样，代码用于验证，但不调用 submitHandler。

我在这里查看了许多线程，说按钮必须是 type="submit"，在 <form> 标签内等，但无法弄清楚。该按钮仍然可以被多次点击。

有什么帮助吗？

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
<script type="text/javascript" src="http://ajax.microsoft.com/ajax/jQuery.Validate/1.6/jQuery.Validate.min.js"></script>


<script type="text/javascript">


$(document).ready(function() {
  $("#freebottleform").validate({
     rules: {
       address : {
           required: true
       },
       city : {
           required: true
       },
       state : {
           required: true
       },
       zipcode : {
           required: true
       },
       phoneNumber : {
           required: true,
           phoneUS: true
       },
     },

     //Specify the validation error messages here
     messages: {
       email: {
         required: "Please enter email address",
        email: "Please enter a valid email address"
       },
       phoneNumber: {
         required : "Please enter your mobile number",
         digits: "Please enter digits only"
       }
     },
        submitHandler: function (form) {
            $("#finalSubmit").attr("disabled", true);
            $("#finalSubmit").html("Submitting... please wait.");
            form.submit();
        }

  });
});


</script>


<!DOCTYPE html>
<html lang="en">
<div class="freebottleform">

    <form method="post"  id="freebottleform" name="freebottleform" action="p6.php">
        Please enter your shipping details.<br>
        <br>
        Address:<br>
        <input type="text" name="address" class="required" placeholder="Please enter your address."/><br>
        <input type="text" name="address2" placeholder="Suite/Apt/Etc."/><br>
        <br>
        City:<br>
        <input type="text" name="city" class="required" placeholder="Please enter your city."/><br>
        <br>
        State:<br>
        <input type="text" name="state" class="required" placeholder="Please enter your state."/><br>
        <br>
        Zip Code:<br>
        <input type="text" name="zipcode" class="required" placeholder="Please enter your zipcode."/><br>
        <br>
        Phone Number:<br>
        <input type="text" name="phoneNumber" class="required" placeholder="Please enter your phone number."/><br>
        <br>
        <label><input type="checkbox" name="subscribe" id="subscribe" value="true" checked/> Subscribe to our newsletter to get FREE weekly tips sent right to your inbox!</label><br>
        <br>

    <button id="finalSubmit" type="submit" name="submit" value="final" >CONTINUE</button>

    </form>

</div>
</html>

【问题讨论】：

几个问题：您是否尝试过升级到较新版本的 JQuery，是否查看过控制台输出是否有异常？
有：TypeError: $.validator.methods[method] is undefined，好像是phoneUS的规则造成的。
@msg 就是这样！我以前为电话号码设置了一个方法，但不小心把它留下了。似乎它正在捕获该错误然后忽略所有代码。非常感谢！
@Dragonsnap 很好，我不知道我正在运行一个非常旧版本的 JQuery 和验证插件。两者都更新了，但问题仍然存在。用另一个答案解决了它。还是谢谢你！

标签： javascript php html jquery

【解决方案1】：

您可以在客户端对按钮的 click 事件进行验证并禁用该按钮。

<script type="text/javascript">

$("#finalSubmit").click(function()
  {
   //do your validation and if correct then disable the button

    $("#finalSubmit").attr("disabled", true);

    //other work if any
   }
  );
</script>

【讨论】：

【解决方案2】：

首先，不要使用 jQuery 进行验证，而是像使用 PHP 等在服务器端进行验证，并将输出反映在显示页面上。

这里有一个例子：

index.php

<!DOCTYPE html>
<html>
  <head>
    <title>Site Title</title>
  </head>
  <body>
    <h1>Form</h1>
    <div class="message"></div>
    <form method="post" action="" name="registrationForm">
      First Name <input type="text" name="fname"><br>
      Last Name <input type="text" name="lname"><br>
      Phone <input type="text" name="phone"><br>
      <input type="submit" value="Register" class="regbtn">
    </form>
    <script type="text/javascript" src="js/jquery.js"></script>
    <script>
      $(document).ready(function(){
        $(".regbtn").click(function(){
          var form = document.registrationForm;
          var dataString = $(form).serialize();
          $.ajax({
            type: 'POST',
            url: "your-processing-page.php",
            data: dataString,
            cache: true,
            beforeSend: function(){
              $('.message').hide();
              $(".regbtn").prop('disabled', true).val('Please wait...');
            },
            success: function(data){
              $('.message').html(data).fadeIn();
              $(".regbtn").prop('disabled', false).val('Register');
            }
          });
          return false;
        });
      });
    </script>
  </body>
</html>

你的处理页面.php

<?php
$fname = (!empty($_POST['fname']))?$_POST['fname']:null;
$lname = (!empty($_POST['lname']))?$_POST['lname']:null;
$phone = (!empty($_POST['phone']))?$_POST['phone']:null;

if($_POST){
  // Perform Checks Here
  if(trim($fname) == ''){
    echo "Please enter first name.";
  }else if(trim($lname) == ''){
    echo "Please enter last name.";
  }else if((strlen($phone)) == 0){
    echo "Please enter a phone number";
  }else if((strlen($phone)) < 10){
    echo "Phone number must not contain less than 10 digits.";
  }else if((strlen($phone)) > 10){
    echo "Phone number must not contain more than 10 digits.";
  }else{
    // If all checks are cleared perform your query
    $stmt = $pdo->prepare("INSERT INTO members(mem_fname, mem_lname, mem_phone)VALUS(:fname, :lname, :phone)");
    $stmt-> bindValue(':fname', $fname);
    $stmt-> bindValue(':lname', $lname);
    $stmt-> bindValue(':phone', $phone);
    $stmt-> execute();

    if($stmt){
      echo "Success! User has been registered.";
    }else{
      echo "Sorry, something went wrong. Please refresh the page and try again!";
    }
  }
}
?>

这是一个完整的答案。这里：

使用 PHP 在服务器端完成验证（更好的方法，必须遵循）。
jQuery 禁用提交按钮以防止点击后重复提交。
当提交按钮被按下时，jQuery 更改按钮文本值，并在表单提交成功返回时更改回默认值。

注意：以上是一个完整的“标准”编码示例。这就是你应该编码的方式。但是，根据您的需要执行其他必要的检查。将上述编码仅作为示例来构建您自己的代码。快乐编码:)

【讨论】：

【解决方案3】：

将提交按钮名称更改为其他名称，因为它会覆盖表单上的 submit() 函数，那么此代码应该适合您（Reference）。 ↓↓

$(document).ready(function() {
  $("#freebottleform").validate({
    rules: {
      address: {
        required: true
      },
      city: {
        required: true
      },
      state: {
        required: true
      },
      zipcode: {
        required: true
      },
      phoneNumber: {
        required: true,
        // phoneUS: true,
        digits: true
      },
    },

    //Specify the validation error messages here
    messages: {
      email: {
        required: "Please enter email address",
        email: "Please enter a valid email address"
      },
      phoneNumber: {
        required: "Please enter your mobile number",
        digits: "Please enter digits only"
      }
    },
    submitHandler: function(form) {
      $("#finalSubmit").attr("disabled", true);
      $("#finalSubmit").html("Submitting... please wait.");

      setTimeout(function() {
        form.submit();
      }, 3000);
    }

  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.1/jquery.validate.min.js"></script>
<!DOCTYPE html>
<html lang="en">

<head>

</head>
<div class="freebottleform">

  <form method="post" id="freebottleform" name="freebottleform" action="p6.php">
    Please enter your shipping details.<br>
    <br> Address:
    <br>
    <input type="text" name="address" class="required" placeholder="Please enter your address." /><br>
    <input type="text" name="address2" placeholder="Suite/Apt/Etc." /><br>
    <br> City:
    <br>
    <input type="text" name="city" class="required" placeholder="Please enter your city." /><br>
    <br> State:
    <br>
    <input type="text" name="state" class="required" placeholder="Please enter your state." /><br>
    <br> Zip Code:<br>
    <input type="text" name="zipcode" class="required" placeholder="Please enter your zipcode." /><br>
    <br> Phone Number:<br>
    <input type="text" name="phoneNumber" class="required" placeholder="Please enter your phone number." /><br>
    <br>
    <label><input type="checkbox" name="subscribe" id="subscribe" value="true" checked/> Subscribe to our newsletter to get FREE weekly tips sent right to your inbox!</label><br>
    <br>

    <button id="finalSubmit" type="submit" name="save" value="final">CONTINUE</button>

  </form>

</div>

</html>

【讨论】：