如何在表单顶部显示所有适用的错误消息，而不是逐个显示错误消息

How to show all the applicable error messages on top of a form instead of showing the error messages one by one?

本文关键字：显示消息错误表单顶部更新时间：2023-09-26

我有一个多步骤表单功能。下面是它的代码。我试图为这段代码创建一个 jsFiddle，但它没有保存在小提琴中，我无法创建它。如果您只是在系统上制作一个HTML文件并复制粘贴整个代码，它将在任何浏览器中运行而无需进行任何更改。

<!doctype HTML>
<html>
  <head>
  <style>
  /*custom font*/
@import url(http://fonts.googleapis.com/css?family=Montserrat);
/*basic reset*/
* {margin: 0; padding: 0;}
html {
    height: 100%;
    /*Image only BG fallback*/
    background: rgba(0,0,0,0.3) url('bg.jpg');
    background-color: rgba(0,0,0,0.3); 
}
body {
    font-family: montserrat, arial, verdana;
}
#mhead {
  font-family: Georgia !important;
  background-color: #f5f5f5;
  border: 1px solid #e3e3e3;
  -webkit-border-radius: 4px;
    -moz-border-radius: 4px;
    border-radius: 4px;
    -webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.05);
    -moz-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.05);
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.05);
    text-align: center; 
    font-family: georgia;
    position: fixed;
    top: 0px;
    width: 100%;
    padding: 20px;
} 
/*form styles*/
#msform {
    width: 400px;
    margin: 110px auto;
    text-align: center;
    position: relative;
}
#msform fieldset {
    background: white;
    border: 0 none;
    border-radius: 3px;
    box-shadow: 0 0 15px 1px rgba(0, 0, 0, 0.4);
    padding: 20px 30px;
    box-sizing: border-box;
    width: 80%;
    margin: 0 10%;
    /*stacking fieldsets above each other*/
    position: absolute;
}
/*Hide all except first fieldset*/
#msform fieldset:not(:first-of-type) {
    display: none;
}
/*inputs*/
#msform input, #msform textarea {
    padding: 15px;
    border: 1px solid #ccc;
    border-radius: 3px;
    margin-bottom: 10px;
    width: 100%;
    box-sizing: border-box;
    font-family: montserrat;
    color: #2C3E50;
    font-size: 13px;
}
/*buttons*/
#msform .action-button {
    width: 100px;
    background: #27AE60;
    font-weight: bold;
    color: white;
    border: 0 none;
    border-radius: 1px;
    cursor: pointer;
    padding: 10px 5px;
    margin: 10px 5px;
}
#msform .action-button:hover, #msform .action-button:focus {
    box-shadow: 0 0 0 2px white, 0 0 0 3px #27AE60;
}
/*headings*/
.fs-title {
    font-size: 15px;
    text-transform: uppercase;
    color: #2C3E50;
    margin-bottom: 10px;
}
.fs-subtitle {
    font-weight: normal;
    font-size: 13px;
    color: #666;
    margin-bottom: 20px;
}
/*progressbar*/
#progressbar {
    margin-bottom: 30px;
    overflow: hidden;
    /*CSS counters to number the steps*/
    counter-reset: step;
}
#progressbar li {
    list-style-type: none;
    color: rgb(0,0,0);
    text-transform: uppercase;
    font-size: 11px;
    width: 33.33%;
    float: left;
    position: relative;
}
#progressbar li:before {
    content: counter(step);
    counter-increment: step;
    width: 20px;
    line-height: 20px;
    display: block;
    font-size: 10px;
    color: #333;
    background: white;
    border-radius: 3px;
    margin: 0 auto 5px auto;
}
/*progressbar connectors*/
#progressbar li:after {
    content: '';
    width: 100%;
    height: 2px;
    background: white;
    position: absolute;
    left: -50%;
    top: 9px;
    z-index: -1; /*put it behind the numbers*/
}
#progressbar li:first-child:after {
    /*connector not needed before the first step*/
    content: none; 
}
/*marking active/completed steps green*/
/*The number of the step and the connector before it = green*/
#progressbar li.active:before,  #progressbar li.active:after{
    background: #27AE60;
    color: white;
}
.red{
color: red;
}
.success{
color:green;
}
#message{
padding-top: 200px;
position: relative;
text-align: center;
}
  </style>  
  <!-- jQuery -->
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
    <!-- jQuery easing plugin -->
    <script src="http://thecodeplayer.com/uploads/js/jquery.easing.min.js" type="text/javascript"></script>
    <script>
    $(document).ready(function() {
    jQuery('#sucess').hide();
    var current_fs, next_fs, previous_fs; //fieldsets
        var left, opacity, scale; //fieldset properties which we will animate
        var animating; //flag to prevent quick multi-click glitches
        $(".next").click(function(event) {
          var fv=formValidation(event);
            if(fv) {
            } else {
                return false;
            }
            if(animating) return false;
            animating = true;
            current_fs = $(this).parent();
            next_fs = $(this).parent().next();
            //activate next step on progressbar using the index of next_fs
            $("#progressbar li").eq($("fieldset").index(next_fs)).addClass("active");
            //show the next fieldset
            next_fs.show(); 
            //hide the current fieldset with style
            current_fs.animate({opacity: 0}, {
                step: function(now, mx) {
                  //as the opacity of current_fs reduces to 0 - stored in "now"
                  //1. scale current_fs down to 80%
                  scale = 1 - (1 - now) * 0.2;
                  //2. bring next_fs from the right(50%)
                  left = (now * 50)+"%";
                  //3. increase opacity of next_fs to 1 as it moves in
                  opacity = 1 - now;
                  current_fs.css({'transform': 'scale('+scale+')'});
                  next_fs.css({'left': left, 'opacity': opacity});
              }, 
            duration: 800, 
            complete: function() {
                current_fs.hide();
                animating = false;
            }, 
            //this comes from the custom easing plugin
            easing: 'easeInOutBack'
        });
    });
    $(".previous").click(function() {
        if(animating) return false;
        animating = true;
        current_fs = $(this).parent();
        previous_fs = $(this).parent().prev();
        //de-activate current step on progressbar
        $("#progressbar li").eq($("fieldset").index(current_fs)).removeClass("active");
        //show the previous fieldset
        previous_fs.show(); 
        //hide the current fieldset with style
        current_fs.animate({opacity: 0}, {
            step: function(now, mx) {
                //as the opacity of current_fs reduces to 0 - stored in "now"
                //1. scale previous_fs from 80% to 100%
                scale = 0.8 + (1 - now) * 0.2;
                //2. take current_fs to the right(50%) - from 0%
                left = ((1-now) * 50)+"%";
                //3. increase opacity of previous_fs to 1 as it moves in
                opacity = 1 - now;
                current_fs.css({'left': left});
                previous_fs.css({'transform': 'scale('+scale+')', 'opacity': opacity});
            }, 
            duration: 800, 
            complete: function() {
                current_fs.hide();
                animating = false;
            }, 
            //this comes from the custom easing plugin
            easing: 'easeInOutBack'
        });
    });
    $("#msform").submit(function() {
      var fname=jQuery('#fname').val();
      if ($.trim(fname).length == 0) {
        document.getElementById("fname").style.borderColor = "#E34234";
        jQuery('.fs-error').html('<span style="color:red;"> Please Enter First Name !</span>');
        jQuery('.fs-error').show();
        return false;
      } else {
        jQuery('.fs-error').hide();
        var serializedReturn = formData();
        window.location = "http://localhost/multistepform/success.php";
          return false; 
        }
    });
  });
  function formData() {
    var serializedValues = jQuery("#msform").serialize();
        var form_data = {
      action: 'ajax_data',
      type: 'post',
      data: serializedValues,
    };
    jQuery.post('insert.php', form_data, function(response) {
          alert(response);
          // document.getElementById("sucess").style.color = "#006600";
          // jQuery('#sucess').show();
    }); 
    return serializedValues;
  }
  function formValidation(e) {
    var emailval=jQuery('#email').val();
      var mailformat = /^'w+(['.-]?'w+)*@'w+(['.-]?'w+)*('.'w{2,3})+$/;  
    // Checking Empty Fields
    var vemail=mailformat.test(emailval)
    if ($.trim(emailval).length == 0 || vemail==false) {
      jQuery('.fs-error').html('<span style="color:red;"> Email is invalid !</span>');
      return false;
    } else {
        jQuery('.fs-error').hide();
    }
      var f_name = document.getElementById("f_name").value;
    if (f_name == '') {
      document.getElementById("f_name").style.borderColor = "#E34234";
        jQuery('.fs-error').html('<span style="color:red;"> Please enter First Name !</span>');
        jQuery('.fs-error').show();
      return false
    } else {
      document.getElementById("f_name").style.borderColor = "#006600";
      document.getElementById("l_name").style.borderColor = "#006600";
          jQuery('.fs-error').hide();       
    }
    var l_name = document.getElementById("l_name").value;
    if (l_name == '') { 
      document.getElementById("l_name").style.borderColor = "#E34234";
    jQuery('.fs-error').html('<span style="color:red;"> Please enter Last Name !</span>');
        jQuery('.fs-error').show();
      return false
    } else {
      document.getElementById("l_name").style.borderColor = "#006600";
          jQuery('.fs-error').hide();
          return true;
    }   
  }
  </script>
    </head>
    <body>
        <div id="mhead"><h2>Multi Step Form with Progress Bar using jQuery, CSS3 and PHP - <span class="red">Info</span>Tuts</h2></div>
      <!-- multistep form -->
      <form id="msform">
      <!-- progressbar -->
      <ul id="progressbar">
          <li class="active">Account Setup</li>
          <li>Social Profiles</li>
          <li>Personal Details</li>
      </ul>
      <!-- fieldsets -->
        <fieldset>
          <h2 class="fs-title">Create your account</h2>
          <h3 class="fs-subtitle">This is step 1</h3>
          <div class="fs-error"></div>
          <input type="text" name="email" id="email" placeholder="Email" />
          <input type="text" name="f_name"  id="f_name" placeholder="First Name" />
          <input type="text" name="l_name"  id="l_name" placeholder="Last Name" />
          <input type="button" name="next" class="next action-button" value="Next" />
      </fieldset>
      <fieldset>
          <h2 class="fs-title">Social Profiles</h2>
          <h3 class="fs-subtitle">Your presence on the social network</h3>
          <input type="text" name="twitter" placeholder="Twitter" />
          <input type="text" name="facebook" placeholder="Facebook" />
          <input type="text" name="gplus" placeholder="Google Plus" />
          <input type="button" name="previous" class="previous action-button" value="Previous" />
          <input type="button" name="next" class="next action-button" value="Next" />
      </fieldset>
      <fieldset>
            <h2 class="fs-title">Personal Details</h2>
            <h3 class="fs-subtitle">We will never sell it</h3>
            <div class="fs-error"></div>
            <input type="text" name="fname" id="fname" placeholder="First Name" />
            <input type="text" name="lname" id="lname" placeholder="Last Name" />
            <input type="text" name="phone" id="phone" placeholder="Phone" />
            <textarea name="address" id="address" placeholder="Address"></textarea>
          <input type="button" name="previous" class="previous action-button" value="Previous" />
          <input type="submit" name="submit" class="submit action-button" value="Submit" />         
      </fieldset>   
    </form>
  </body>
</html>

当前，当用户

单击"下一步"按钮时，错误消息会一一显示，但是当用户未在字段中输入任何数据（即电子邮件，名字和姓氏）时，我想将所有三条错误消息一起显示。目前，我可以一一显示错误消息。我不想再这样做了，我想在用户单击"下一步"按钮时一起显示所有适用的错误消息。

我应该怎么做？请帮助我。

再次为无法创建 js 小提琴而道歉。

谢谢。

您有两个选择：

1）通过附加以下内容将所有错误消息收集到变量中：

rrrorText .= '<span class="stylish">we have toruble!</span>'

并在形成之前输出它。

2）你做一个空的div：

<div id="poo"></div>

并用类似javascript的东西向它添加错误：

document.getElementById('poo').innerHTML .= 'we have another problem!';