Get checkbox value in jQuery

How can I get a checkbox's 开发者_StackOverflowvalue in jQuery?

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To get the value of the Value attribute you can do something like this:

$("input[type='checkbox']").val();

Or if you have set a class or id for it, you can:

$('#check_id').val();
$('.check_class').val();

However this will return the same value whether it is checked or not, this can be confusing as it is different to the submitted form behaviour.

To check whether it is checked or not, do:

if ($('#check_id').is(":checked"))
{
  // it is checked
}

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Those 2 ways are working:

• $('#checkbox').prop('checked')
• $('#checkbox').is(':checked') (thanks @mgsloan)

$('#test').click(function() {
    alert("Checkbox state (method 1) = " + $('#test').prop('checked'));
    alert("Checkbox state (method 2) = " + $('#test').is(':checked'));
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
Check me: <input id="test" type="checkbox" />

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Try this small solution:

$("#some_id").attr("checked") ? 1 : 0;

or

$("#some_id").attr("checked") || 0;

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The best way of retrieving a checkbox's value is as following

if ( elem.checked ) 
if ( $( elem ).prop( "checked" ) ) 
if ( $( elem ).is( ":checked" ) ) 

as explained in the official documentations in jQuery's website. The rest of the methods has nothing to do with the property of the checkbox, they are checking the attribute which means they are testing the initial state of the checkbox when it was loaded. So in short:

• When you have the element and you know it is a checkbox you can simply read its property and you won't need jQuery for that (i.e. elem.checked) or you can use $(elem).prop("checked") if you want to rely on jQuery.
• If you need to know (or compare) the value when the element was first loaded (i.e. the default value) the correct way to do it is elem.getAttribute("checked") or elem.prop("defaultChecked").

Please note that elem.attr("checked") is modified only after version 1.6.1+ of jQuery to return the same result as elem.prop("checked").

Some answers are misleading or imprecise, Please check below yourself:

http://api.jquery.com/prop/

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Just to clarify things:

$('#checkbox_ID').is(":checked")

Will return 'true' or 'false'

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$('#checkbox_id').val();
$('#checkbox_id').is(":checked");
$('#checkbox_id:checked').val();

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Simple but effective and assumes you know the checkbox will be found:

$("#some_id")[0].checked;

Gives true/false

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//By each()
var testval = [];
 $('.hobbies_class:checked').each(function() {
   testval.push($(this).val());
 });


//by map()
var testval = $('input:checkbox:checked.hobbies_class').map(function(){
return this.value; }).get().join(",");

 //HTML Code

 <input type="checkbox" value="cricket" name="hobbies[]"  class="hobbies_class">Cricket 
  <input type="checkbox" value="hockey" name="hobbies[]" class="hobbies_class">Hockey

Example
Demo

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jQuery(".checkboxClass").click(function(){
        var selectedCountry = new Array();
        var n = jQuery(".checkboxClass:checked").length;
        if (n > 0){
            jQuery(".checkboxClass:checked").each(function(){
                selectedCountry.push($(this).val());
            });
        }
        alert(selectedCountry);
    });

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Despite the fact that this question is asking for a jQuery solution, here is a pure JavaScript answer since nobody has mentioned it.

Without jQuery:

Simply select the element and access the checked property (which returns a boolean).

var checkbox = document.querySelector('input[type="checkbox"]');

alert(checkbox.checked);

<input type="checkbox"/>

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Here is a quick example listening to the change event:

var checkbox = document.querySelector('input[type="checkbox"]');
checkbox.addEventListener('change', function (e) {
    alert(this.checked);
});

<input type="checkbox"/>

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To select checked elements, use the :checked pseudo class (input[type="checkbox"]:checked).

Here is an example that iterates over checked input elements and returns a mapped array of the checked element's names.

Example Here

var elements = document.querySelectorAll('input[type="checkbox"]:checked');
var checkedElements = Array.prototype.map.call(elements, function (el, i) {
    return el.name;
});

console.log(checkedElements);

var elements = document.querySelectorAll('input[type="checkbox"]:checked');
var checkedElements = Array.prototype.map.call(elements, function (el, i) {
    return el.name;
});

console.log(checkedElements);

<div class="parent">
    <input type="checkbox" name="name1" />
    <input type="checkbox" name="name2" />
    <input type="checkbox" name="name3" checked="checked" />
    <input type="checkbox" name="name4" checked="checked" />
    <input type="checkbox" name="name5" />
</div>

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$("input[name='gender']:checked").val();

this worked in my case, anyone looking for a simple way, must try this syntax. Thanks

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Here is how to get the value of all checked checkboxes as an array:

var values = (function() {
                var a = [];
                $(".checkboxes:checked").each(function() {
                    a.push(this.value);
                });
                return a;
            })()

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Use the following code:

$('input[name^=CheckBoxInput]').val();

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to get value of checked checkboxex in jquery:

var checks = $("input[type='checkbox']:checked"); // returns object of checkeds.

for(var i=0; i<checks.length; i++){
    console.log($(checks[i]).val()); // or do what you want
});

in pure js:

var checks = document.querySelectorAll("input[type='checkbox']:checked");

for(var i=0; i<checks.length; i++){
    console.log(checks[i].value); // or do what you want
});

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You could use the following. It is tested working OK.

$('#checkbox_id').is(":checked"); // jQuery

if checkbox is checked this will return true and vice versa.

This below code fragment is for anyone trying to do the same in JavaScript.

document.getElementById("checkbox_id").checked //JavaScript

return true if checkbox is checked

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$('.class[value=3]').prop('checked', true);

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Best way is $('input[name="line"]:checked').val()

And also you can get selected text $('input[name="line"]:checked').text()

Add value attribute and name to your radio button inputs. Make sure all inputs have same name attribute.

<div class="col-8 m-radio-inline">
    <label class="m-radio m-radio-filter">
        <input type="radio" name="line" value="1" checked> Value Text 1
    </label>
    <label class="m-radio m-radio-filter">
        <input type="radio" name="line" value="2"> Value Text 2
    </label>
    <label class="m-radio m-radio-filter">
        <input type="radio" name="line" value="3"> Value Text 3
    </label>
</div>

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For more than 1 checkbox always use named array as show in the below example with countries, as you know countries can be selected multiple so I used name="countries[]" and while checking checkboxes you have to reference it by name as shown in below example

var selectedCountries = ["Pakistan", "USA"];

$(document).ready(function () {
  $.each(selectedCountries, function (index, country) {
    $(`input[name='countries[]'][value='${country}']`).attr('checked', 'checked');
  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<p>
  <input type="checkbox" name="countries[]" value="Pakistan">
  Pakistan
</p>
<p>
  <input type="checkbox" name="countries[]" value="India">
  India
</p>
<p>
  <input type="checkbox" name="countries[]" value="USA">
  USA
</p>

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If only one child is expected to be selected:

form.querySelector(":checked").value

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<script type="text/javascript">
$(document).ready(function(){
    $('.laravel').click(function(){
        var val = $(this).is(":checked");
        $('#category').submit();
    });
});

<form action="{{route('directory')}}" method="post" id="category">
                        <input type="hidden" name="_token" value="{{ csrf_token() }}">
                        <input name="category" value="{{$name->id}}"  class="laravel" type="checkbox">{{$name->name}}
                      </form>

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Just attention, as of today, 2018, due to api changing over the years. removeAttr are depricated, NOT working anymore!

Jquery Check or unCheck a checkbox:

Bad, not working any more.

   $('#add_user_certificate_checkbox').removeAttr("checked");

   $('#add_user_certificate_checkbox').attr("checked","checked");

Instead you should do:

      $('#add_user_certificate_checkbox').prop('checked', true);
      $('#add_user_certificate_checkbox').prop('checked', false);