jQuery checkbox check/uncheck [duplicate]

Question

What would be a proper way to check/uncheck checkbox that's placed inside the element that triggers my function?

Here's my code:

<table id="news_list"> <tr> <td><input type="checkbox" name="news[1]" /></td> <td>TEXT</td> </tr></table> $("#news_list tr").click(function() { var ele = $(this).find('input'); if(ele.is(':checked')){ ele.removeAttr('checked'); $(this).removeClass('admin_checked'); }else{ ele.attr('checked', 'checked'); $(this).addClass('admin_checked'); } });

The problem is I can check and uncheck each box only once. After I've checked and unchecked sometimes it still does add/remove class, but never checking a box again (even when I click on checkbox, not table row).

I've tried using .bind('click') trigger, but it's the same result.

Any solutions?

Looking at the answers, I'm not so sure they give a solution to what you are trying to do. I don't see why it would make sense to basically disable checkbox, which is what those given answers are doing ( Because when you click the checkbox it becomes checked and that means the if statement will immediately uncheck it... and that means you can never actually check the checkbox by clicking the actual checkbox... right? ). Is this what you are looking to do?: jsfiddle.net/7gbhf — Joonas
– Joonas, Commented Feb 8, 2013 at 10:24
@Joonas Thanks, this is exactly what i needed! Jai's answer did work for signle row, not for multiple — user1587985
– user1587985, Commented Feb 8, 2013 at 10:49
Good. One thing though. If my jsfiddle is exactly what you need, I'm not sure I see how Jai's answer works for one row. It doesn't let you check the checkbox by clicking the checkbox, which is due to the if statement as I explained above. So I'm thinking that you missed that part, or... I still don't know what you wanted :) — Joonas
– Joonas, Commented Feb 8, 2013 at 10:55

Peter Mortensen · Accepted Answer · 2017-05-21 10:58:56Z

48

Use .prop() instead and if we go with your code then compare like this:

Look at the example jsbin:

 $("#news_list tr").click(function () { var ele = $(this).find(':checkbox'); if ($(':checked').length) { ele.prop('checked', false); $(this).removeClass('admin_checked'); } else { ele.prop('checked', true); $(this).addClass('admin_checked'); } });

Changes:

Changed input to :checkbox.
Comparing the length of the checked checkboxes.

edited May 21, 2017 at 10:58

Peter Mortensen

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answered Feb 8, 2013 at 10:03

Jai

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4 Comments

machineaddict Over a year ago

prop didn't worked for me, but removeAttr and attr did, using jQuery 1.9.1.

Nick Lewis Over a year ago

Thanks, prop has sorted out a different issue for me, so found this piece of info very useful.

ppostma1 Over a year ago

if this doesn't work, ensure the IDs are not duplicated between elements

Jai Over a year ago

Thanks for the edits @PeterMortensen

Adil · Accepted Answer · 2014-07-03 05:33:00Z

Use prop() instead of attr() to set the value of checked. Also use :checkbox in find method instead of input and be specific.

Live Demo

$("#news_list tr").click(function() { var ele = $(this).find('input'); if(ele.is(':checked')){ ele.prop('checked', false); $(this).removeClass('admin_checked'); }else{ ele.prop('checked', true); $(this).addClass('admin_checked'); } });

Use prop instead of attr for properties like checked

As of jQuery 1.6, the .attr() method returns undefined for attributes that have not been set. To retrieve and change DOM properties such as the checked, selected, or disabled state of form elements, use the .prop() method

api.jquery.com/checkbox-selector Because :checkbox is a jQuery extension and not part of the CSS specification, queries using :checkbox cannot take advantage of the performance boost provided by the native DOM querySelectorAll() method. For better performance in modern browsers, use [type="checkbox"] instead.
Actually this is the correct solution . Accepted answer have some problem.Thank you for this solution .

Community · Accepted Answer · 2018-04-27 14:38:35Z

 $('mainCheckBox').click(function(){ if($(this).prop('checked')){ $('Id or Class of checkbox').prop('checked', true); }else{ $('Id or Class of checkbox').prop('checked', false); } });

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