如何根据该列标题检查表行中的单选按钮？

Question

I have a scenario like below:

I have to add the attribute 'checked' on the radio button which having the header 'MyHeader2'

 <table> <tr> <th> MyHeader </th> <th> MyHeader2 </th> </tr> <tr> <td> <input type='radio' name='testradio' /> </td> <td> <input type='radio' name='testradio1' /> </td> </tr> </table> 

How to implement this in jQuery?

Answer 1

Try this:

$("table tr th:contains(MyHeader2)").each(function(){
  var i = $(this).index(); //Get the index of the th.
  $("table tr td:eq("+i+") input:radio").prop("checked",true); // Set the radio to checked. 
})

demo

 $("table tr th:contains(MyHeader2)").each(function() { var i = $(this).index(); $("table tr td:eq(" + i + ") input:radio").prop("checked", true) }) 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <table> <tr> <th> MyHeader </th> <th> MyHeader2 </th> </tr> <tr> <td> <input type='radio' name='testradio' /> </td> <td> <input type='radio' name='testradio1' /> </td> </tr> </table> 

Answer 2

You better consider using data-attributes where you need things like this.

Makes life easy for you.

Just add heading as data property to checkbox like

data-heading="MyHeader"

And then it'll be easy for you to select it like

$("input[data-heading='MyHeader2']")

 $("input[data-heading='MyHeader2']").prop("checked", true) 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> <table> <tr> <th> MyHeader </th> <th> MyHeader2 </th> </tr> <tr> <td> <input type='radio' data-heading="MyHeader" name='testradio' /> </td> <td> <input type='radio' data-heading="MyHeader2" name='testradio1' /> </td> </tr> </table> 

Answer 3

You can first get the header index based on the value of header MyHeader2 . Using this index you can select the radio button in the td and mark it checked.

 $(document).ready(function(){ var headerValue = 'MyHeader2'; $('table tr th').each(function(index){ if($(this).text().trim() === headerValue){ headerIndex = index; } }); $('table tr').each(function(){ $(this).find('td:eq('+headerIndex+')').find('input[type=radio]').prop("checked", true); }); }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script> <table> <tr> <th> MyHeader </th> <th> MyHeader2 </th> </tr> <tr> <td> <input type='radio' name='testradio' /> </td> <td> <input type='radio' name='testradio1' /> </td> </tr> <tr> <td> <input type='radio' name='testradio3' /> </td> <td> <input type='radio' name='testradio4' /> </td> </tr> </table>