[jquery] Set selected radio from radio group with a value

Why am I struggling with this?

I have a value: 5

How do I check the radio button of group "mygroup" with the value of 5?

$("input[name=mygroup]").val(5); // doesn't work?

There is a better way of checking radios and checkbox; you have to pass an array of values to the val method instead of a raw value

Note: If you simply pass the value by itself (without being inside an array), that will result in all values of "mygroup" being set to the value.

$("input[name=mygroup]").val([5]);

Here is the jQuery doc that explains how it works: http://api.jquery.com/val/#val-value

And .val([...]) also works with form elements like <input type="checkbox">, <input type="radio">, and <option>s inside of a <select>.

The inputs and the options having a value that matches one of the elements of the array will be checked or selected, while those having a value that don't match one of the elements of the array will be unchecked or unselected

Fiddle demonstrating this working: https://jsfiddle.net/92nekvp3/

$("input[name='RadioTest'][value='2']").prop('checked', true);

JS fiddle Demo

$("input[name='mygroup'][value='5']").attr("checked", true);

Pure JavaScript version:

document.querySelector('input[name="myradio"][value="5"]').checked = true;

When you change attribute value like mentioned above the change event is not triggered so if needed for some reasons you can trigger it like so

$('input[name=video_radio][value="' + r.data.video_radio + '"]')
       .prop('checked', true)
       .trigger('change');

var key = "Name_radio";
var val = "value_radio";
var rdo = $('*[name="' + key + '"]');
if (rdo.attr('type') == "radio") {
 $.each(rdo, function (keyT, valT){
   if ((valT.value == $.trim(val)) && ($.trim(val) != '') && ($.trim(val) != null))

   {
     $('*[name="' + key + '"][value="' + (val) + '"]').prop('checked', true);
   }
  })
}

Or you can just write value attribute to it:

$(':radio[value=<yourvalue>]').attr('checked',true);

This works for me.

Try this:

$('input:radio[name="mygroup"][value="5"]').attr('checked',true);

JS Fiddle demo.

$('input[name="mygroup"]').val([5])