Setting "checked" for a checkbox with jQuery

Question

I'd like to do something like this to tick a checkbox using jQuery:

$(".myCheckBox").checked(true);

or

$(".myCheckBox").selected(true);

Does such a thing exist?

Freedman

A more specific (and very useful!) question, "How do I check a item in a checkbox-set BY VALUE?", I think we can also discuss here, and I posted an answer below. – Heckelphone

Check other ways to do this using jQuery here https://mcmap.net/q/36189/-check-if-checkbox-is-checked-with-jquery – Sebastian

If you need the onchange event triggered, it's $("#mycheckbox").click(); – Moreville

"Checking something" suggests testing it, so I think 'Making a checkbox checked' is a more clear and better title. – Koblick

prop(); function is the perfect answer. See the function definition - api.jquery.com/prop – Aceto

attr() doesnot work with IE. using prop() is the best option – Berryman

$(".myCheckBox").prop("checked", true) – Kildare

Answer 1

Modern jQuery

Use .prop():

$('.myCheckbox').prop('checked', true);
$('.myCheckbox').prop('checked', false);

DOM API

If you're working with just one element, you can always just access the underlying HTMLInputElement and modify its .checked property:

$('.myCheckbox')[0].checked = true;
$('.myCheckbox')[0].checked = false;

The benefit to using the .prop() and .attr() methods instead of this is that they will operate on all matched elements.

jQuery 1.5.x and below

The .prop() method is not available, so you need to use .attr().

$('.myCheckbox').attr('checked', true);
$('.myCheckbox').attr('checked', false);

Note that this is the approach used by jQuery's unit tests prior to version 1.6 and is preferable to using $('.myCheckbox').removeAttr('checked'); since the latter will, if the box was initially checked, change the behaviour of a call to .reset() on any form that contains it – a subtle but probably unwelcome behaviour change.

For more context, some incomplete discussion of the changes to the handling of the checked attribute/property in the transition from 1.5.x to 1.6 can be found in the version 1.6 release notes and the Attributes vs. Properties section of the .prop() documentation.

Probably

Yes this is setting the attribute value, and uncheck by removing the attribute. I have updated my answer to show this. – Probably

@Probably removing the the checked attribute makes it impossible to reset the form – Valvate

Problem here is if you need something that works for both versions. In that case, you can use the plugin. :) Thanks for the update! – Circus

As a side note, jQuery 1.6.1 should be fixing the issue I mentioned, so we can tehcnically all still go back to using $(...).prop(...) – Circus

"If you're working with just one element, it will always be fastest to use DOMElement.checked = true". But it would be negligible, because it's only one element... – Frustrated

As Tyler says, it is a negligible improvement in performance. To me, coding using a common API makes it more readable than mixing native API and jQuery APIs. I'd stick with jQuery. – Iaria

@TylerCrompton - Of course, its not entirely about performance, but doing $(element).prop('checked') is a complete waste of typing. element.checked exists and should be used in the cases where you already have element – Hagio

How can I see prop() in the source code. I tried to search and found these instances but nothing that seems right: pix.realquadrant.com/jquery-prop – Hhour

Answer 2

Use:

$(".myCheckbox").attr('checked', true); // Deprecated
$(".myCheckbox").prop('checked', true);

And if you want to check if a checkbox is checked or not:

$('.myCheckbox').is(':checked');

Ebullience

also $(selector).checked to check is checked – Philomena

I tried this exact code and it didn't work for me in the case of a select all / select none checkbox that needs to check and uncheck all as well as check their state. Instead, I tried @Christopher Harris' answer and that did the trick. – Abscess

Why using "form #mycheckbox" instead of simply "#mycheckbox"? The id is already unique in the whole document, it is faster and simpler to pick it directly. – Clough

@Clough it was an example. you can use whatever selector you want. – Ebullience

$(selector).checked does not work. There is no 'checked' method in jQuery. – Kovar

@BrendanByrd There's a checked property on the DOM object though (without the jQuery wrapping) – Ebullience

Answer 3

This is the correct way of checking and unchecking checkboxes with jQuery, as it is cross-platform standard, and will allow form reposts.

$('.myCheckBox').each(function(){ this.checked = true; });

$('.myCheckBox').each(function(){ this.checked = false; });

By doing this, you are using JavaScript standards for checking and unchecking checkboxes, so any browser that properly implements the "checked" property of the checkbox element will run this code flawlessly. This should be all major browsers, but I am unable to test previous to Internet Explorer 9.

The Problem (jQuery 1.6):

Once a user clicks on a checkbox, that checkbox stops responding to the "checked" attribute changes.

Here is an example of the checkbox attribute failing to do the job after someone has clicked the checkbox (this happens in Chrome).

Fiddle

The Solution:

By using JavaScript's "checked" property on the DOM elements, we are able to solve the problem directly, instead of trying to manipulate the DOM into doing what we want it to do.

Fiddle

This plugin will alter the checked property of any elements selected by jQuery, and successfully check and uncheck checkboxes under all circumstances. So, while this may seem like an over-bearing solution, it will make your site's user experience better, and help prevent user frustration.

(function( $ ) {
    $.fn.checked = function(value) {
        if(value === true || value === false) {
            // Set the value of the checkbox
            $(this).each(function(){ this.checked = value; });
        } 
        else if(value === undefined || value === 'toggle') {
            // Toggle the checkbox
            $(this).each(function(){ this.checked = !this.checked; });
        }

        return this;
    };
})( jQuery );

Alternatively, if you do not want to use a plugin, you can use the following code snippets:

// Check
$(':checkbox').prop('checked', true);

// Un-check
$(':checkbox').prop('checked', false);

// Toggle
$(':checkbox').prop('checked', function (i, value) {
    return !value;
});

Circus

In your first JSFiddle example you should be using removeAttr('checked') rather than attr('checked', false) – Imine

@DanielXMoore, You're skirting around the issue. The example was to show that once the check-box was clicked by the user, the browser no longer responds to checked attribute changes, regardless of the method used to change them. – Circus

@ChristopherHarris Ok, you're right, I missed that. As of jQuery 1.6 shouldn't you use the .prop method though?$('.myCheckBox').prop('checked', true) That way it will automatically apply to the entire set of matched elements (only when setting though, getting is still only the first) – Imine

Yes. prop is definitely the appropriate way to set attributes on an element. – Circus

@ChristopherHarris, I have added what I needed to the plugin to allow some parameter flexibility. This made inline processing easier without the type conversion. Esp from disparate databases with 'ideas' about what "true" is. Fiddle: jsfiddle.net/Cyberjetx/vcp96 – Fissure

@JoeJohnston In a perfect world, that shouldn't be built into the plugin. Instead, it should be converted to a true/false value before being using with the plugin. What's to say a database doesn't consider '0' true? It all depends on the database. – Circus

Answer 4

You can do

$('.myCheckbox').attr('checked',true) //Standards compliant

or

$("form #mycheckbox").attr('checked', true)

If you have custom code in the onclick event for the checkbox that you want to fire, use this one instead:

$("#mycheckbox").click();

You can uncheck by removing the attribute entirely:

$('.myCheckbox').removeAttr('checked')

You can check all checkboxes like this:

$(".myCheckbox").each(function(){
    $("#mycheckbox").click()
});

Ebersole

you can also go $("#myTable input:checkbox").each(...); – Trochaic

You can also go $(".myCheckbox").click() – Autoeroticism

@Michah removing the the checked attribute makes it impossible to reset the form – Valvate

This answer is out-of-date because it uses .attr instead of .prop. – Hallett

$("#mycheckbox").click(); worked for me as I was listening to change event too and .attr & .prop didn't fire change event. – Contrabassoon

Answer 5

You can also extend the $.fn object with new methods:

(function($)  {
   $.fn.extend({
      check : function()  {
         return this.filter(":radio, :checkbox").attr("checked", true);
      },
      uncheck : function()  {
         return this.filter(":radio, :checkbox").removeAttr("checked");
      }
   });
}(jQuery));

Then you can just do:

$(":checkbox").check();
$(":checkbox").uncheck();

Or you may want to give them more unique names like mycheck() and myuncheck() in case you use some other library that uses those names.

Judie

@livfree75 removing the the checked attribute makes it impossible to reset the form – Valvate

This answer is out-of-date because it uses .attr instead of .prop. – Hallett

Answer 6

$("#mycheckbox")[0].checked = true;
$("#mycheckbox").attr('checked', true);
$("#mycheckbox").click();

The last one will fire the click event for the checkbox, the others will not. So if you have custom code in the onclick event for the checkbox that you want to fire, use the last one.

Trochaic

top one will fail...checked is not a jquery object member – Granado

This answer is out-of-date because it uses .attr instead of .prop. – Hallett

IMO the click event is unreliable in Firefox and Edge. – Broaddus

Answer 7

To check a checkbox you should use

 $('.myCheckbox').attr('checked',true);

or

 $('.myCheckbox').attr('checked','checked');

and to uncheck a check box you should always set it to false:

 $('.myCheckbox').attr('checked',false);

If you do

  $('.myCheckbox').removeAttr('checked')

it removes the attribute all together and therefore you will not be able to reset the form.

BAD DEMO jQuery 1.6. I think this is broken. For 1.6 I am going to make a new post on that.

NEW WORKING DEMO jQuery 1.5.2 works in Chrome.

Both demos use

$('#tc').click(function() {
    if ( $('#myCheckbox').attr('checked')) {
        $('#myCheckbox').attr('checked', false);
    } else {
        $('#myCheckbox').attr('checked', 'checked');
    }
});

Valvate

This is inaccurate. setting the 'checked' attribute to '' will not uncheck check boxes in at least chrome. – Circus

@xixonia I did test before I posted your fiddle doesn't work because you didn't change the menu on the left to include jquery – Valvate

@xixonia thanks again, It seems this doesn't work the same way in jauery 1.6 see note above thanks for adding your solution as well – Valvate

mcgralim - in 1.6 its even easier.... $(".mycheckbox").prop("checked", true/false) – Hagio

@Hagio thats great but now i'll have to go change that in all my code 8 ^ ( – Valvate

@Valvate - its still not released, but we may be adding some backwards compat for .attr() with boolean attributes -- although I wish we wouldn't -- Read: forum.jquery.com/topic/prop-attr-rewrite-again – Hagio

@Hallett do you mean you use .prop rather than .attr ? – Valvate

Your answer promised a new up-to-date solution, which you never provided. .attr has been the wrong approach to this problem for more than two years now. – Hallett

I did post a corrected answer at the time but that was 4 years ago dude. I don't go around updating all my posts and I'm sure most people don't. You down vote was for a post 4 years old saying it's out of date, well duh – Valvate

@DaveRager in this case, though, the obsolete answers are not only obsolete, but also completely redundant since the accepted answer covers their content fine already. There's no point in updating an obsolete answer if afterwards it will still not be useful. – Calciferol

@MarkAmery you mentioned that my post added nothing at the time of post but that is in accurate. If you look at the history of the accepted answer you'll find they suggest removing the element. Which makes it impossible to reset the form, which was why I posted to begin with. – Valvate

@Valvate I've gone ahead and modified the accepted answer in light of your remarks. If you'd like to cast an eye over it and check that it looks good in its current state, I'd appreciate that. My apologies again for offering up sharp criticism that was, at least in part, highly misguided. – Calciferol

Answer 8

This selects elements that have the specified attribute with a value containing the given substring "ckbItem":

$('input[name *= ckbItem]').prop('checked', true);

It will select all elements that contain ckbItem in its name attribute.

Clara

Answer 9

Assuming that the question is...

How do I check a checkbox-set BY VALUE?

Remember that in a typical checkbox set, all input tags have the same name, they differ by the attribute value: there are no ID for each input of the set.

Xian's answer can be extended with a more specific selector, using the following line of code:

$("input.myclass[name='myname'][value='the_value']").prop("checked", true);

Heckelphone

Answer 10

I'm missing the solution. I'll always use:

if ($('#myCheckBox:checked').val() !== undefined)
{
    //Checked
}
else
{
    //Not checked
}

Monte

This doesn't answer the question (the question is about setting whether a checkbox is checked, not determining whether a checkbox is checked). It's also a pretty ugly way of determining if the checkbox is checked (for one thing, you're exploiting the non-self-evident fact that .val() will always return undefined when called on 0 elements to detect that a jQuery object is empty, when you could simply check its .length instead) - see #902212 for more readable approaches. – Calciferol

Answer 11

To check a checkbox using jQuery 1.6 or higher just do this:

checkbox.prop('checked', true);

To uncheck, use:

checkbox.prop('checked', false);

Here' s what I like to use to toggle a checkbox using jQuery:

checkbox.prop('checked', !checkbox.prop('checked'));

---

If you're using jQuery 1.5 or lower:

checkbox.attr('checked', true);

To uncheck, use:

checkbox.attr('checked', false);

Ringster

Answer 12

Here is a way to do it without jQuery

function addOrAttachListener(el, type, listener, useCapture) {
  if (el.addEventListener) {
    el.addEventListener(type, listener, useCapture);
  } else if (el.attachEvent) {
    el.attachEvent("on" + type, listener);
  }
};

addOrAttachListener(window, "load", function() {
  var cbElem = document.getElementById("cb");
  var rcbElem = document.getElementById("rcb");
  addOrAttachListener(cbElem, "click", function() {
    rcbElem.checked = cbElem.checked;
  }, false);
}, false);

<label>Click Me!
  <input id="cb" type="checkbox" />
</label>
<label>Reflection:
  <input id="rcb" type="checkbox" />
</label>

Byelection

Answer 13

Here is code for checked and unchecked with a button:

var set=1;
var unset=0;
jQuery( function() {
    $( '.checkAll' ).live('click', function() {
        $( '.cb-element' ).each(function () {
            if(set==1){ $( '.cb-element' ).attr('checked', true) unset=0; }
            if(set==0){ $( '.cb-element' ).attr('checked', false); unset=1; }
        });
        set=unset;
    });
});

Update: Here is the same code block using the newer Jquery 1.6+ prop method, which replaces attr:

var set=1;
var unset=0;
jQuery( function() {
    $( '.checkAll' ).live('click', function() {
        $( '.cb-element' ).each(function () {
            if(set==1){ $( '.cb-element' ).prop('checked', true) unset=0; }
            if(set==0){ $( '.cb-element' ).prop('checked', false); unset=1; }
        });
        set=unset;
    });
});

Zuber

This answer is out-of-date because it uses .attr instead of .prop. – Hallett

Answer 14

Try this:

$('#checkboxid').get(0).checked = true;  //For checking

$('#checkboxid').get(0).checked = false; //For unchecking

Transmigrant

Answer 15

We can use elementObject with jQuery for getting the attribute checked:

$(objectElement).attr('checked');

We can use this for all jQuery versions without any error.

Update: Jquery 1.6+ has the new prop method which replaces attr, e.g.:

$(objectElement).prop('checked');

Incudes

This answer is out-of-date because it uses .attr instead of .prop. – Hallett

Answer 16

If you are using PhoneGap doing application development, and you have a value on the button that you want to show instantly, remember to do this

$('span.ui-[controlname]',$('[id]')).text("the value");

I found that without the span, the interface will not update no matter what you do.

Fransiscafransisco

Answer 17

Here is the code and demo for how to check multiple check boxes...

http://jsfiddle.net/tamilmani/z8TTt/

$("#check").on("click", function () {

    var chk = document.getElementById('check').checked;
    var arr = document.getElementsByTagName("input");

    if (chk) {
        for (var i in arr) {
            if (arr[i].name == 'check') arr[i].checked = true;
        }
    } else {
        for (var i in arr) {
            if (arr[i].name == 'check') arr[i].checked = false;
        }
    }
});

Caputto

-​1; mixing jQuery selectors like $("#check") with raw DOM API calls like document.getElementsByTagName("input") seems inelegant to me, especially given that the for loops here could be avoided by using .prop(). Regardless this is yet another late answer that adds nothing new. – Calciferol

Answer 18

Another possible solution:

    var c = $("#checkboxid");
    if (c.is(":checked")) {
         $('#checkboxid').prop('checked', false);
    } else {
         $('#checkboxid').prop('checked', true);
    }

Forehanded

Answer 19

As @livefree75 said:

jQuery 1.5.x and below

You can also extend the $.fn object with new methods:

(function($)  {
   $.fn.extend({
      check : function()  {
         return this.filter(":radio, :checkbox").attr("checked", true);
      },
      uncheck : function()  {
         return this.filter(":radio, :checkbox").removeAttr("checked");
      }
   });
}(jQuery));

But in new versions of jQuery, we have to use something like this:

jQuery 1.6+

    (function($)  {
       $.fn.extend({
          check : function()  {
             return this.filter(":radio, :checkbox").prop("checked", true);
          },
          uncheck : function()  {
             return this.filter(":radio, :checkbox").prop("checked",false);
          }
       });
    }(jQuery));

Then you can just do:

    $(":checkbox").check();
    $(":checkbox").uncheck();

Khalif

Answer 20

For jQuery 1.6+

$('.myCheckbox').prop('checked', true);
$('.myCheckbox').prop('checked', false);

For jQuery 1.5.x and below

$('.myCheckbox').attr('checked', true);
$('.myCheckbox').attr('checked', false);

To check,

$('.myCheckbox').removeAttr('checked');

Julio

Answer 21

If using mobile and you want the interface to update and show the checkbox as unchecked, use the following:

$("#checkbox1").prop('checked', false).checkboxradio("refresh");

Gust

Answer 22

Be aware of memory leaks in Internet Explorer prior to Internet Explorer 9, as the jQuery documentation states:

In Internet Explorer prior to version 9, using .prop() to set a DOM element property to anything other than a simple primitive value (number, string, or boolean) can cause memory leaks if the property is not removed (using .removeProp()) before the DOM element is removed from the document. To safely set values on DOM objects without memory leaks, use .data().

Mell

This is irrelevant, since all the (correct) answers use .prop('checked',true). – Hallett

Not sure I understood your comment.This still exists in jQuery documentation. Are you implying there is no memory leak in IE < 9 ? – Mell

There is no memory leak in this case, since we are setting it to a simple primitive value (Boolean). – Hallett

Answer 23

To check and uncheck

$('.myCheckbox').prop('checked', true);
$('.myCheckbox').prop('checked', false);

Insanity

-​1; this adds no value at all to an already bloated thread. The code here is exactly the same as the accepted answer. – Calciferol

Answer 24

$('controlCheckBox').click(function(){
    var temp = $(this).prop('checked');
    $('controlledCheckBoxes').prop('checked', temp);
});

Martyrology

-​1 for being a code-only answer, not answering the question directly, and adding nothing that other answers hadn't already covered. – Calciferol

Answer 25

This is probably the shortest and easiest solution:

$(".myCheckBox")[0].checked = true;

or

$(".myCheckBox")[0].checked = false;

---

Even shorter would be:

$(".myCheckBox")[0].checked = !0;
$(".myCheckBox")[0].checked = !1;

---

Here is a jsFiddle as well.

Tain

Answer 26

Plain JavaScript is very simple and much less overhead:

var elements = document.getElementsByClassName('myCheckBox');
for(var i = 0; i < elements.length; i++)
{
    elements[i].checked = true;
}

Example here

Narthex

@MarkAmery The accepted answer does not cover how to do it without jQuery. My answer adds supplementary benefit to the accepted answer. – Narthex

Answer 27

When you checked a checkbox like;

$('.className').attr('checked', 'checked')

it might not be enough. You should also call the function below;

$('.className').prop('checked', 'true')

Especially when you removed the checkbox checked attribute.

Apuleius

Answer 28

I couldn't get it working using:

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

Both true and false would check the checkbox. What worked for me was:

$("#cb").prop('checked', 'true'); // For checking
$("#cb").prop('checked', '');     // For unchecking

Christiansen

shouldn't it be true and false and not 'true' and 'false'? – Freedman

It "didn't work" because 'false' was converted to boolean value which resulted in true - empty string evaluates to false thus it "worked". See this fiddle for example of what I mean. – Crummy

@chris97ong I've rolled back your edit; when someone says "Don't use the code below because it doesn't work", fixing that code while leaving the comment saying that it doesn't work is harmful - especially when it breaks the explanation in the comments of why the code isn't working. That said, this answer is still somewhat confused and deserves a downvote for the reasons given by tpower and ShadowWizard. – Calciferol

use true and false values for boolean, do not use 'true' or 'false' (strings). – Howie

Answer 29

Here's the complete answer using jQuery

I test it and it works 100% :D

    // when the button (select_unit_button) is clicked it returns all the checed checkboxes values 
    $("#select_unit_button").on("click", function(e){

             var arr = [];

             $(':checkbox:checked').each(function(i){
                 arr[i] = $(this).val(); // u can get id or anything else
             });

              //console.log(arr); // u can test it using this in google chrome
    });

Peppermint

Answer 30

In jQuery,

if($("#checkboxId").is(':checked')){
    alert("Checked");
}

or

if($("#checkboxId").attr('checked')==true){
    alert("Checked");
}

In JavaScript,

if (document.getElementById("checkboxID").checked){
    alert("Checked");
}

Annelieseannelise

This does not answer the question. – Remove

This answer is out-of-date because it uses .attr instead of .prop. – Hallett

Answer 31

In case you use ASP.NET MVC, generate many checkboxes and later have to select/unselect all using JavaScript you can do the following.

HTML

@foreach (var item in Model)
{
    @Html.CheckBox(string.Format("ProductId_{0}", @item.Id), @item.IsSelected)
}

JavaScript

function SelectAll() {       
        $('input[id^="ProductId_"]').each(function () {          
            $(this).prop('checked', true);
        });
    }

    function UnselectAll() {
        $('input[id^="ProductId_"]').each(function () {
            $(this).prop('checked', false);
        });
    }

I

Why is the each needed here? – Freedman

Answer 32

This may help someone.

HTML5

 <input id="check_box" type="checkbox" onclick="handleOnClick()">

JavaScript.

  function handleOnClick(){

      if($("#check_box").prop('checked'))
      {        
          console.log("current state: checked");
      }
      else
      {         
          console.log("current state: unchecked");
      }    
 }

Mandle

Answer 33

if($('jquery_selector').is(":checked")){
  //somecode
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

Acarid

When giving an answer it is preferable to give some explanation as to WHY your answer is the one. – Dehumanize

Answer 34

If you are using .prop('checked', true|false) and don’t have changed checkbox, you need to add trigger('click') like this:

// Check
$('#checkboxF1').prop( "checked", true).trigger('click');


// Uncheck
$('#checkboxF1').prop( "checked", false).trigger('click');

Audsley

so happy that I found this. thank you! almost went nuts!! – Jeb

Answer 35

$(".myCheckBox").prop("checked","checked");

Pitzer

This answer is out-of-date because it uses .attr instead of .prop. – Hallett

Answer 36

You can check a checkbox checked condition using JavaScript in different ways. You can see below.

1. First method - $('.myCheckbox').prop('checked', true);

2. Second method - $('.myCheckbox').attr('checked', true);

3. Third method (for check condition if checkbox is checked or not) - $('.myCheckbox').is(':checked')

Selsyn

Answer 37

You can try this:

$('input[name="activity[task_state]"]').val("specify the value you want to check ")

Injection

Answer 38

If you happen to be using Bootstrap (perhaps unawarely) ...

$('#myCheckbox').bootstrapToggle('on')
$('#myCheckbox').bootstrapToggle('off')

http://www.bootstraptoggle.com/

Hegarty

Answer 39

Edited on 2019 January

You can use: .prop( propertyName ) - version added: 1.6

p {margin: 20px 0 0;}
b {color: red;}
label {color: red;}

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<input id="check1" type="checkbox" checked="checked">
<label for="check1">Check here</label>
<p></p>
 
<script>
$( "input" ).change(function() {
  var $input = $( this );
  $( "p" ).html(
    "The .attr( \"checked\" ): <b>" + $input.attr( "checked" ) + "</b><br>" +
    "The .prop( \"checked\" ): <b>" + $input.prop( "checked" ) + "</b><br>" +
    "The .is( \":checked\" ): <b>" + $input.is( ":checked" ) + "</b>" );
}).change();
</script>
 
</body>
</html>

On Angular Framework

Example 1

In your .html file

<input type="checkbox" (change)="toggleEditable($event)">

In your .ts file

toggleEditable(event) {
     if ( event.target.checked ) {
         this.contentEditable = true;
    }
}

Example 2

In your .html file

<input type="checkbox" [(ngModel)]="isChecked" (change)="checkAction(isChecked ? 'Action1':'Action2')" />

Goldsberry

Answer 40

I was wondering why none of the old answers mentioned that to fully simulate the ticking, you also need to simulate the change event if you want to fire something else after simulating ticking:

$('.myCheckbox').prop('checked', true).trigger("change");
$('.myCheckbox').prop('checked', false).trigger("change");

Refutative

Answer 41

You can do this if you have the id to check it

document.getElementById('ElementId').checked = false

And this to uncheck

document.getElementById('ElementId').checked = true

Alterant

It works, but that's not about jquery. – Fenner

Answer 42

A JavaScript solution can be also simple and with less overhead:

document.querySelectorAll('.myCheckBox').forEach(x=> x.checked=1)

document.querySelectorAll('.myCheckBox').forEach(x=> x.checked=1)

checked A: <input type="checkbox" class="myCheckBox"><br/>
unchecked: <input type="checkbox"><br/>
checked B: <input type="checkbox" class="myCheckBox"><br/>

Ceroplastics

This belongs on Check/Uncheck checkbox with JavaScript (jQuery or Vanilla)? or JavaScript check multiple checkbox, not this jQuery question. – Pazia

Answer 43

If you consider using vanilla js instead of jquery there is a solution:

//for one element: 
document.querySelector('.myCheckBox').checked = true /* or false */ //will select the first matched element
//for multiple elements:
for (const checkbox of document.querySelectorAll('.myCheckBox')) {
checkbox.checked = true //or false
}

Odiliaodille

Answer 44

For overall:

$("#checkAll").click(function(){
    $(".somecheckBoxes").prop('checked',$(this).prop('checked')?true:false);
});

Acanthous