Get checkbox value in jQuery

Question

How can I get a checkbox's value in jQuery?

Answer 1

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

Answer 2

//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

Answer 3

Use the following code:

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

Answer 4

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;
            })()

Answer 5

The only correct ways 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).is(":checked").

Answers are misleading, Please check below yourself:

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

Answer 6

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"/>

---

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"/>

---

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>