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Two checkboxes acting as one

I have two checkboxes on a page and I want them to act as only one. For example, I select one, and the other is selected automatically, and vice-versa.
I've managed to select both of them at once, but I can't seem to figure out a way to deselect them at once.
And what's bothering me the most, is that it's probably a super simple line of code that I'm simply not remembering.
Is there a way to do this?

Is this what you're looking for?
$(".test").change(function () {
$(".test").attr("checked", this.checked);
});
<input type='checkbox' class='test'>A<br />
<input type='checkbox' class='test'>B<br />

Here is a solution in pure javascript:
// Select all checkboxes using `.checkbox` class
var checkboxes = document.querySelectorAll('.checkbox');
// Loop through the checkboxes list
checkboxes.forEach(function (checkbox) {
// Then, add `change` event on each checkbox
checkbox.addEventListener('change', function(event) {
// When the change event fire,
// Loop through the checkboxes list and update the value
checkboxes.forEach(function (checkbox) {
checkbox.checked = event.target.checked;
});
});
});
<label><input type="checkbox" class="checkbox"> Item 1</label>
<br>
<label><input type="checkbox" class="checkbox"> Item 2</label>

$(document).ready(function() {
$('#check_one').change(function() {
$('#check_two').prop('checked', $('#check_one').prop('checked'));
});
$('#check_two').change(function() {
$('#check_one').prop('checked', $('#check_two').prop('checked'));
});
});
<form>
<label>Simple checkbox</label>
<input type="checkbox" id="check_one" />
<label>Complicated checkbox</label>
<input type="checkbox" id="check_two" />
</form>
Assuming you have two checkboxes named differently but working in concert, this code would work

html:
<input type="checkbox" id="1" class="handleAsOne">
<input type="checkbox" id="2" class="handleAsOne">
javascript (jquery):
$('.handleAsOne').on('change'){
$('.handleAsOne').prop('checked', false);
$(this).prop('checked', true);
}
if i understood your question correctly you are looking for something like this.

jQuery checking checkboxes does not work

I'm trying to implement a "Select All" checkbox on an HTML form using JQuery 1.9.1. As far as I can tell, it should be as simple as using .prop to check or uncheck a checkbox, but nothing I try seems to work.
Please see below for what I have tried, I've commented out some failed attempts out and I cannot get this to work for even one checkbox. What is the correct way to do this? Am I missing something, possibly in the HTML?
HTML
<input type="checkbox" id="cb_select_all" name="cb_select_all" value="t" />
<label for="cb_select_all"><b>Select All</b>
</label>
<br />
<input type="checkbox" name="cb1" id="cb1" class="cb_all" value="t" />
<label for="cb1">1 test</label>
<br />
<input type="checkbox" name="cb2" id="cb2" class="cb_all" value="t" />
<label for="cb2">2 test</label>
Javascript
$(document).ready(function () {
$("#cb_select_all").change(cb_select_all_onchange);
}); //end $(document).ready
function cb_select_all_onchange() {
if ($("#cb_select_all").checked) {
//$("#cb1").prop("checked", true);
//$(".cb_all").each(function(){ this.checked = true; });
//document.getElementById("cb1").checked = true;
$(".cb_all").prop("checked", true);
} else {
$("#cb1").prop("checked", false);
}
}
http://jsfiddle.net/mLnb5qed/5/
Thanks,
jdt

Change your if to this
if ($("#cb_select_all")[0].checked) { }
( or ) if ($("#cb_select_all").is(":checked")) { }
The problem is the first one is a property of native element and not jQuery object. Accessing it by an index gives you the ability to use that property. The second way is the jQuery way.

Use
$("#cb_select_all").is(':checked');

This worked for me:
$(document).ready(function () {
$("#cb_select_all").change(function () {
if ($("#cb_select_all").prop("checked") == true) {
$('.cb_all').prop('checked', true);
}
else {
$('.cb_all').prop('checked', false);
}
});
});
What happens:
Check if the "cb_select_all" checkbox changes state
if the "checked" state is set to true
check all "cb_all" checkboxes
else
uncheck all "cb_all" checkboxes

Need Help To Uncheck Radio Button If Aleady Checked Using Jquery

i need help to uncheck or check same radio button if button already checked? I have jquery function which is used to enable or disabled other radio buttons if already checked now i want to add some function that use for check or uncheck same radio button?
(function ($) {
$(document).ready(function () {
$('input:radio').click(function(){
var $inputs = $('input:radio')
if($(this).is(':checked')){
$inputs.not(this).prop('disabled',true);
}else{
$inputs.prop('disabled',false);
}
})
});
})(jQuery);
<input type="radio" value="Test1" />Test1
<input type="radio" value="Test2" />Test2
<input type="radio" value="Test1" />Test1
<input type="radio" value="Test2" />Test2

Although it is too late to answer, it could help others
I tried this solution.
Works very well for me!
$("input[type='radio'].myClass").click(function(){
var $self = $(this);
if ($self.attr('checkstate') == 'true')
{
$self.prop('checked', false);
$self.each( function() {
$self.attr('checkstate', 'false');
})
}
else
{
$self.prop('checked', true);
$self.attr('checkstate', 'true');
$("input[type='radio'].myClass:not(:checked)").attr('checkstate', 'false');
}
})

Simply replace disabled with checked:
$input.prop("checked", false);
or for this element:
this.checked = false;
However, if you are looking for form element which can be checked and unchecked, maybe input type="checkbox" /> is what you need.

$inputs.filter(':checked').prop('checked', false);

I think you need checkbox instead of radio button to uncheck the checked :
<input class="checkDisable" type="checkbox" value="Test1" />Test1
<input class="checkDisable" type="checkbox" value="Test2" />Test2
<input class="checkDisable" type="checkbox" value="Test3" />Test3
<input class="checkDisable" type="checkbox" value="Test4" />Test4
(function ($) {
$(document).ready(function () {
$('input:checkbox.checkDisable').change(function(){
var $inputs = $('input:checkbox.checkDisable')
if($(this).is(':checked')){
$inputs.not(this).prop('disabled',true);
}else{
$inputs.prop('disabled',false);
$(this).prop('checked',false);
}
})
});
})(jQuery);

The answer of Pablo Araya is good, but ...
$self.prop('checked', true);
is superfluous here. The radio button already has a checked state for every click.

Select All checkboxes using jQuery

I have the following html code:
<input type="checkbox" id="ckbCheckAll" />
<p id="checkBoxes">
<input type="checkbox" class="checkBoxClass" id="Checkbox1" />
<br />
<input type="checkbox" class="checkBoxClass" id="Checkbox2" />
<br />
<input type="checkbox" class="checkBoxClass" id="Checkbox3" />
<br />
<input type="checkbox" class="checkBoxClass" id="Checkbox4" />
<br />
<input type="checkbox" class="checkBoxClass" id="Checkbox5" />
<br />
</p>
When user checks ckbCheckAll all checkboxes must be checked. Also I have following jquery code:
$(document).ready(function () {
$("#ckbCheckAll").click(function () {
$(".checkBoxClass").attr('checked', this.checked);
});
});
When I see my page in the browser I get the following result:
In the first click on ckbCheckAll all checkboxes were checked (which is correct). In the second click on ckbCheckAll all checkboxes were unchecked (which is correct). But in 3rd attempt nothing happened! also in 4th attempt nothing happened and so on.
Where is the problem?

Use prop
$(".checkBoxClass").prop('checked', true);
or to uncheck:
$(".checkBoxClass").prop('checked', false);
http://jsfiddle.net/sVQwA/
$("#ckbCheckAll").click(function () {
$(".checkBoxClass").prop('checked', $(this).prop('checked'));
});
Updated JSFiddle Link: http://jsfiddle.net/sVQwA/1/

Here is a simple way to do this :
Html :
<input type="checkbox" id="selectall" class="css-checkbox " name="selectall"/>Selectall<br>
<input type="checkbox" class="checkboxall" value="checkbox1"/>checkbox1<br>
<input type="checkbox" class="checkboxall" value="checkbox2"/>checkbox2<br>
<input type="checkbox" class="checkboxall" value="checkbox3"/>checkbox3<br>
jquery :
$(document).ready(function(){
$("#selectall").click(function(){
if(this.checked){
$('.checkboxall').each(function(){
$(".checkboxall").prop('checked', true);
})
}else{
$('.checkboxall').each(function(){
$(".checkboxall").prop('checked', false);
})
}
});
});

Use below code..
$('#globalCheckbox').click(function(){
if($(this).prop("checked")) {
$(".checkBox").prop("checked", true);
} else {
$(".checkBox").prop("checked", false);
}
});
$('.checkBox').click(function(){
if($(".checkBox").length == $(".checkBox:checked").length) {
//if the length is same then untick
$("#globalCheckbox").prop("checked", false);
}else {
//vise versa
$("#globalCheckbox").prop("checked", true);
}
});

Try the following simple code:
$('input[type=checkbox]').each(function() { this.checked = true; });
Source: How to reset all checkboxes using jQuery or pure JS?

use this
if (this.checked)
$(".checkBoxClass").attr('checked', "checked");
else
$(".checkBoxClass").removeAttr('checked');
also you can use prop please check http://api.jquery.com/prop/

I have seen many answers to this question and found some answer is lengthy and some answer is a little bit wrong. I have created my own code by using the above IDs and class.
$('#ckbCheckAll').click(function(){
if($(this).prop("checked")) {
$(".checkBoxClass").prop("checked", true);
} else {
$(".checkBoxClass").prop("checked", false);
}
});
$('.checkBoxClass').click(function(){
if($(".checkBoxClass").length == $(".checkBoxClass:checked").length) {
$("#ckbCheckAll").prop("checked", true);
}else {
$("#ckbCheckAll").prop("checked", false);
}
});
In the above code, where user clicks on select all checkbox and all checkbox will be selected and vice versa and second code will work when the user selects checkbox one by one then select all checkbox will be checked or unchecked according to a number of checkboxes checked.

$(document).ready(function() {
$('#ckbCheckAll').click(function() {
$('.checkBoxClass').each(function() {
$(this).attr('checked',!$(this).attr('checked'));
});
});
});
OR
$(function () {
$('#ckbCheckAll').toggle(
function() {
$('.checkBoxClass').prop('checked', true);
},
function() {
$('.checkBoxClass').prop('checked', false);
}
);
});

Try this
$(document).ready(function () {
$("#ckbCheckAll").click(function () {
$("#checkBoxes input").prop('checked', $(this).prop('checked'));
});
});
That should do it :)

$(document).ready(function(){
$('#ckbCheckAll').click(function(event) {
if($(this).is(":checked")) {
$('.checkBoxClass').each(function(){
$(this).prop("checked",true);
});
}
else{
$('.checkBoxClass').each(function(){
$(this).prop("checked",false);
});
}
});
});

Use prop() instead -
$(document).ready(function () {
$("#ckbCheckAll").click(function () {
$(".checkBoxClass").each(function(){
if($(this).prop("checked", true)) {
$(this).prop("checked", false);
} else {
$(this).prop("checked", true);
}
});
});
});
BUT I like #dmk's much more compact answer and +1'd it

$(document).ready(function () {
$(".class").on('click', function () {
$(".checkbox).prop('checked', true);
});
});

Let i have the following checkboxes
<input type="checkbox" name="vehicle" value="select All" id="chk_selall">Select ALL<br>
<input type="checkbox" name="vehicle" value="Bike" id="chk_byk">bike<br>
<input type="checkbox" name="vehicle" value="Car" id="chk_car">car
<input type="checkbox" name="vehicle" value="Bike" id="chk_bus">Bus<br>
<input type="checkbox" name="vehicle" value="scooty" id="chk_scooty">scooty
Here is the simple code to select all and diselect all when the selectall check box will click
<script type="text/javascript">
$(document).ready(function () {
$("#chk_selall").on("click", function () {
$("#chk_byk").prop("checked", true);
$("#chk_car").prop("checked", true);
$("#chk_bus").prop("checked", true);
$("#chk_scooty").prop("checked", true);
})
$("#chk_selall").on("click", function () {
if (!$(this).prop("checked"))
{
$("#chk_byk").prop("checked", false);
$("#chk_car").prop("checked", false);
$("#chk_bus").prop("checked", false);
$("#chk_scooty").prop("checked", false);
}
});
});
</script>

checkall is the id of allcheck box and cb-child is the name of each checkboxes that will be checked and unchecked depend on checkall click event
$("#checkall").click(function () {
if(this.checked){
$("input[name='cb-child']").each(function (i, el) {
el.setAttribute("checked", "checked");
el.checked = true;
el.parentElement.className = "checked";
});
}else{
$("input[name='cb-child']").each(function (i, el) {
el.removeAttribute("checked");
el.parentElement.className = "";
});
}
});

jQuery( function($){
// add multiple select / deselect functionality
$("#contact_select_all").click(function () {
if($("#contact_select_all").is(":checked")){
$('.noborder').prop('checked',true);
}else
$('.noborder').prop('checked',false);
});
// if all checkbox are selected, check the selectall checkbox
$(".noborder").click(function(){
if($(".noborder").length == $(".noborder:checked").length) {
$("#contact_select_all").attr("checked", "checked");
} else {
$("#contact_select_all").removeAttr("checked");
}
});
});

I know its too late, but I'm posting this for the upcoming developers.
For select all checkbox we need to check three conditions,
1. on click select all checkbox every checkbox should get selected
2. if all selected then on click select all checkbox, every checkbox should get deselected
3. if we deselect or select any of the checkbox the select all checkbox also should change.
with these three things we'll get a good result.for this you can approach this link https://qawall.in/2020/05/30/select-all-or-deselect-all-checkbox-using-jquery/
I got my solution from here, they have provided solution with examples.
<table>
<tr>
<th><input type="checkbox" id="select_all"/> Select all</th>
</tr>
<tr>
<td><input type="checkbox" class="check" value="1"/> Check 1</td>
<td><input type="checkbox" class="check" value="2"/> Check 2</td>
<td><input type="checkbox" class="check" value="3"/> Check 3</td>
<td><input type="checkbox" class="check" value="4"/> Check 4</td>
<td><input type="checkbox" class="check" value="5"/> Check 5</td>
</tr>
<script type="text/javascript">
$(document).ready(function(){
$('#select_all').on('click',function(){
if(this.checked){
$('.check').each(function(){
this.checked = true;
});
}else{
$('.check').each(function(){
this.checked = false;
});
}
});
$('.check').on('click',function(){
if($('.check:checked').length == $('.check').length){
$('#select_all').prop('checked',true);
}else{
$('#select_all').prop('checked',false);
}
});
});
hope this will help anyone ...:)

Add jquery-2.1.0.min.js file
<script src="https://code.jquery.com/jquery-2.1.0.min.js"></script>
Write the codes given below:
<script>
$(document).ready(function () {
$("#checkAll").change(function() {
var checked = $(this).is(':checked'); // Get Checkbox state
if (this.checked) //If true then checked all checkboxes
$(".classofyourallcheckbox").prop('checked', true);
else
$(".classofyourallcheckbox").prop('checked', false); //or uncheck all textboxes
});
});
</script>

Control Radio Buttons with a Checkbox

I'm using a CMS that hides form elements behind tags, because of some system quirks I've had to set up a checkbox that controls the radio buttons so if the checkbox is ticked the "yes" radio button is selected if not the "no" is selected. I also want the radio buttons to have option "no" checked by default but I don't have control over the line of code for the radio buttons.
I found some Javascript that does a small part of this but I want to integrate it into the jQuery that displays and hides content when the box is ticked.
Here's what I have so far:
$('#checkbox1').change(function() {
$('#content1').toggle("slow");
});
The Javascript I have is this:
function ticked(){
var ischecked = document.getElementById("checkbox").checked;
var collection = document.getElementById("hideradio").getElementsByTagName('INPUT');
if(ischecked){collection[0].checked = true;}else{collection[0].checked = false;}
}
Can you please help write a version of the Javascript but integrate with my jQuery?
Thanks,

You can try this, I assume your html as like this.
<input type="checkbox" id="checkbox1" /> Check Box
<div id="content1" >
Some Content <br />
Some Content <br />
Some Content <br />
Some Content
</div>
<div id="hideradio">
<input type="radio" name="rgroup" value="yes" /> Yes
<input type="radio" name="rgroup" value="no" /> No
</div>
JQuery
$(function(){
$('#hideradio input[type=radio][value=no]').attr('checked',true);
$('#content1').hide();
});
$('#checkbox1').on('change', function() {
$('#content1').toggle("slow");
var self = this;
if(self.checked)
$('#hideradio input[type=radio][value=yes]').attr('checked',true);
else
$('#hideradio input[type=radio][value=no]').attr('checked',true);
});
A Quick DEMO

Try this code
​
$(function(){
$('#checkbox1').on('click' , function() {
var isChecked = $(this).is(':checked');
if(isChecked){
$('#radio1').attr('checked' , true);
$('#content1').toggle("slow");
}
else{
$('#radio1').attr('checked' , false);
}
});
});​
Check [FIDDLE]

If I don't understand correctly then let me know.
I don't know your HTML code so I provide one
<form>
<input type="checkbox" name="test_ck" id="test_ck" />
<br/>
<input type="radio" name="test_radio" id="test_radio" />
</form>
<div id="content"> A content !!! </div>
and javascript jquery
$(function(){
$("#test_ck").on("change", function(){
$("#test_radio").prop("checked", $(this).is(":checked"));
$("#content").toggle("slow");
});
});
Example -> jsfiddle
UPDATED jsfiddle
http://jsfiddle.net/6wQxw/2/

jsfiddle
$(document).on('change', '#checkbox', function() { toggle(this); });
var toggle = function(obj) {
var checked = $(obj || '#checkbox').is(':checked');
$(':radio[value=no]').prop('checked', !checked);
$(':radio[value=yes]').prop('checked', checked);
$('#content').toggle(checked);
}
toggle();

This is a pure JavaScript solution, no need to use jQuery:
<body>
<label for="a">Male</label>
<input type="radio" id="a">
<br/>
<label for="b">Female</label>
<input type="radio" id="b">
<script type="text/javascript">
var nodes = document.querySelectorAll("input[type=radio]");// get elements
var arr = Array.prototype.slice.call(nodes); // convert nodes to array for use in forEach
arr.forEach(function(obj){
obj.addEventListener("change",function(e){
arr.forEach(function(obj){
obj.checked = false;//make other radio false
});
this.checked = true;// make this radio ture
});
});
</script>
</body>