How to handle change of checkbox using jQuery?

Question

I have some code

<input type="checkbox" id="chk" value="value" />
<label for="chk">Value </label>
<br/>
<input type="button" id="But1" value="set value" />
<br />
<input type="button" id="But2" value="read checked" />

javascript:

$(document).ready(function () {
    console.log("Ready ...");
    registerHandlers();

    function registerHandlers() {
        $('#But1').click(function () {
            $('#chk').prop('checked', !$('#chk').is(':checked'));
        });
        $('#But2').click(function () {
            var chk1 = $('#chk').is(':checked');
            console.log("Value : " + chk1);
        });

        $('input[type="checkbox"]').change(function () {
            var name = $(this).val();
            var check = $(this).prop('checked');
            console.log("Change: " + name + " to " + check);
        });
    }
});

How to handle change of checkbox using jQuery ? I need to put the handler to change any checkboxes checked.

[update]

There is a checkbox and a few buttons. Each button can change check box. How to catch an event changing the checkbox?

[Update]

I need handle change checkbox in this example jsfiddle. When I click on the box the message "OK" button is not shown.

I don't really understand your problem? What is supposed to happen when a checkbox is changed? — Niklas, Feb 07 '12 at 16:40
Could you please rephrase your question? You already have $('input[type="checkbox"]').change handler, whats wrong ? — Madman, Feb 07 '12 at 16:41
If you change the button checkbox change events do not occur — BILL, Feb 07 '12 at 16:43
FYI; `$('#chk').prop('checked')` returns a boolean rather then the value of the attribute. See http://api.jquery.com/prop — Stefan, Feb 07 '12 at 16:45
There is a checkbox and a few buttons. Each button can change check box. How to catch an event changing the checkbox? — BILL, Feb 07 '12 at 16:51

score 178 · Accepted Answer · edited Jan 07 '15 at 15:40

178

Use :checkbox selector:

$(':checkbox').change(function() {

        // do stuff here. It will fire on any checkbox change

});

Code: http://jsfiddle.net/s6fe9/

edited Jan 07 '15 at 15:40

Philzen

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answered Feb 07 '12 at 16:39

Samich

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82

...and `this.checked` is very useful to determine wether the checkbox is checked or not. – Stefan Feb 07 '12 at 16:42
1

Is it possible to register multiple handlers? – BILL Feb 07 '12 at 17:07
1

Is this still recommended in 2015? – EugenSunic Oct 06 '15 at 07:53
2

It doesn't look like API has been changed, so yes. – Samich Oct 06 '15 at 12:48
this needs to be inside of $(document).ready(function ()... for me, is that correct? – kaya Aug 30 '18 at 08:51
It can be there – Samich Aug 30 '18 at 15:06

Pinkesh Sharma · Answer 2 · 2018-12-10T18:54:19.230

76

You can use Id of the field as well

$('#checkbox1').change(function() {
   if($(this).is(":checked")) {
      //'checked' event code
      return;
   }
   //'unchecked' event code
});

edited Dec 10 '18 at 18:54

answered Oct 17 '13 at 07:09

Pinkesh Sharma

2,428
20
16

score 18 · Answer 3 · edited Jun 02 '16 at 20:13

18

Hope, this would be of some help.

$('input[type=checkbox]').change(function () {
    if ($(this).prop("checked")) {
        //do the stuff that you would do when 'checked'

        return;
    }
    //Here do the stuff you want to do when 'unchecked'
});

edited Jun 02 '16 at 20:13

Chris Marisic

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answered Feb 07 '12 at 16:41

Lokesh Yadav

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as of jQuery 1.6, better to use $(this).prop("checked"), as it will change dynamically with the actual state of the checkbox. – hrabinowitz Feb 19 '14 at 20:55
3

.attr("checked") isn't correct, because it isn't updated as the user clicks. I confirm @hrabinowitz's comment. – Adrien Oct 27 '14 at 09:29

Arjun · Answer 4 · 2017-02-23T10:51:32.263

11

$("input[type=checkbox]").on("change", function() { 

    if (this.checked) {

      //do your stuff

     }
});

edited Feb 23 '17 at 10:51

answered May 22 '15 at 12:13

Arjun

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Please check your own code works before posting. There is a glaring issue with your selectors... – Jonathan Jun 23 '16 at 15:56
live() is deprecated. – guettli Feb 23 '17 at 08:48

score 6 · Answer 5 · edited Jun 23 '16 at 15:58

6

$('#myForm').on('change', 'input[type=checkbox]', function() {
    this.checked ? this.value = 'apple' : this.value = 'pineapple';
});

edited Jun 23 '16 at 15:58

Jonathan

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answered Dec 17 '14 at 12:17

Everton Z. P.

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Please elaborate your answer: code-only solutions are more likely to get deleted, because they don't explain, just fix (if any). – rekaszeru Dec 17 '14 at 12:42
Sorry @rekaszeru I'll do it better next time – Everton Z. P. Dec 19 '14 at 10:24

score 0 · Answer 6 · answered Jun 30 '16 at 11:26

It seems to me removeProp is not working properly in Chrome : jsfiddle

        $('#badBut1').click(function () {
        checkit('Before');
        if( $('#chk').prop('checked') )
        {
          $('#chk').removeProp('checked');
        }else{
            $('#chk').prop('checked', true);
        }
        checkit('After');
    });
    $('#But1').click(function () {
        checkit('Before');
        if( $('#chk').prop('checked') )
        {
          $('#chk').removeClass('checked').prop('checked',false);
        }else{
            $('#chk').addClass('checked').prop('checked', true);
        }
        checkit('After');
    });

    $('#But2').click(function () {
        var chk1 = $('#chk').is(':checked');
        console.log("Value : " + chk1);
    });

    $('#chk').on( 'change',function () {
        checkit('Result');
    });
    function checkit(moment) {
        var chk1 = $('#chk').is(':checked');
        console.log(moment+", value = " + chk1);
    };

How to toggle a checkbox without event (from the outside) : http://jsfiddle.net/k91k0sLu/1/ — Glaubule, Jun 30 '16 at 11:59

score 0 · Answer 7 · answered Dec 01 '16 at 17:18

0

get radio value by name

  $('input').on('className', function(event){
        console.log($(this).attr('name'));
        if($(this).attr('name') == "worker")
            {
                resetAll();                 
            }
    });

answered Dec 01 '16 at 17:18

Siva Anand

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How to handle change of checkbox using jQuery?

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