从表单提交上的单选按钮获取HTML5自定义数据*属性

Question

Is there a way to get the custom HTML5 data-* attributes for the selected radio button when you submit a form? The value does not seem to get picked up by serializeArray() .

HTML

<form id="preference-form">
<table>
<tr class ="result">
    <td width="100%">{{Title}}</td>
    <td><input type="radio" id="radio-{{Project_No}}-1" data-application="{{Application_ID}}" name="{{Project_ID}}" value="1"></td>
    <td><input type="radio" id="radio-{{Project_No}}-2" data-application="{{Application_ID}}" name="{{Project_ID}}" value="2"></td>
    <td><input type="radio" id="radio-{{Project_No}}-3" data-application="{{Application_ID}}" name="{{Project_ID}}" value="3"></td>
    <td><input type="radio" id="radio-{{Project_No}}-9" data-application="{{Application_ID}}" name="{{Project_ID}}" value="9"></td>
</tr>
</table>
</form>

JavaScript

$("#preference-form).on('submit', function() {
    var data = $(this).serializeArray();
    console.log(data)
});

This outputs the name and value fields, but I can't seem to find a simple answer about the data-* fields. Unfortunately, I need all three pieces of information in order to perform an update on the database record, and from what I understand:

• Each ID and Value field has to be unique,
• Each name field has to be identical to group the elements.

I think the tricky part for this is the multiple elements compared to a single element.

Answer 1

Based on comment that all you have is radios; writing your own serializer is simple.

First I would put the data attribute on the <tr> for less repetition

<tr data-application="{{Application_ID}}">

Then you would do something like:

var data = $(this).find('tr:has(:radio:checked)').map(function(){
   var $row=$(this), radio = $row.find(':radio:checked')[0]
   return {
      app: $row.data('application'),
      name: radio.name,
      value: radio.value
   }
}).get()

Answer 2

You are missing #

  $('#preference-form').on('submit', function(e) { 

Use a hidden input for the data-* attribute values. The following demo sends to a live test server and the response will be displayed in the iframe below.

 $('#preference-form').on('submit', function(e) { radData(e); var data = $(this).serializeArray(); console.log(data); }); var radData = e => { $(':radio:checked').each(function(e) { var dataSet = $(this).data('application'); $(this).closest('tr').find('.dataSet').val(dataSet); }); } 

 .as-console-wrapper { width: 350px; min-height: 100%; margin-left: 45%; } .as-console-row.as-console-row::after { content: ''; padding: 0; margin: 0; border: 0; width: 0; } .hide { display: none } 

 <form id="preference-form" action='https://httpbin.org/post' method='post' target='response'> <table width='100%'> <tr class="result"> <td><input type="radio" id="rad1" data-application="rad1" name="rad1" value="1"></td> <td><input type="radio" id="rad2" data-application="rad2" name="rad1" value="2"></td> <td><input type="radio" id="rad3" data-application="rad3" name="rad1" value="3"></td> <td><input type="radio" id="rad9" data-application="rad9" name="rad1" value="9"> </td> <td class='hide'> <input class='dataSet' name='dataSet1' type='hidden'> </td> </tr> <tr class="result"> <td><input type="radio" id="rad4" data-application="rad4" name="rad2" value="4"></td> <td><input type="radio" id="rad5" data-application="rad5" name="rad2" value="5"></td> <td><input type="radio" id="rad6" data-application="rad6" name="rad2" value="6"></td> <td><input type="radio" id="radA" data-application="radA" name="rad2" value="A"> </td> <td class='hide'> <input class='dataSet' name='dataSet2' type='hidden'> </td> </tr> <tr class="result"> <td><input type="radio" id="rad7" data-application="rad7" name="rad3" value="7"></td> <td><input type="radio" id="rad8" data-application="rad8" name="rad3" value="8"></td> <td><input type="radio" id="radB" data-application="radB" name="rad3" value="B"></td> <td><input type="radio" id="radC" data-application="radC" name="rad3" value="C"> </td> <td class='hide'> <input class='dataSet' name='dataSet3' type='hidden'> </td> </tr> </table> <input type='submit'> </form> <iframe name='response'></iframe> <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>