Check if checkbox is NOT checked on click - jQuery

Question

I want to check if a checkbox just got unchecked  when a user clicks on it  The reason for this is because i want to do a validation when a user unchecks a checkbox  Because atleast one checkbox needs to be checked  So if he unchecks the last one  then it automatically checks itself again   With jQuery i can easily find out wether it s checked or not       check1   click function         if   this  is   checked            alert  checked        else         alert  unchecked          But i actually only want to have an if statement that checks if a checkbox just got unchecked   So i thought i could do that with the following code       check2   click function         if   this  not   checked            alert  unchecked        else         alert  checked          But this will always show the  unchecked  message  Not really what i was expecting     demo  http   jsfiddle net tVM5H   So eventually i need something like       check2   click function         if   this  not   checked                 Got unchecked  so something                But obviously this doesn t work  I rather don t want to use the first example  because then i d have an unnecessary  else  statement when i only need one  if  statement   So first thing  is this a jQuery bug  Cause to me it s unexpected behaviour  And second  anyone any ides for a good alternative

User · Answer

lt script type  text javascript  gt    if jQuery  input id input id    is   checked          Your Statment   else       Your Statment      OR   if jQuery  input name input name    is   checked          Your Statment   else       Your Statment      lt  script gt    Code taken from here   http   chandreshrana blogspot in 2015 10 how-to-check-if-checkbox-is-checked-or html

User · Answer

Do it like this   if  typeof   this  attr  checked       undefined        To check if checkbox is checked if    this  attr  checked     checked

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jQuery to check for checked  Really   if  this checked      Don t use a bazooka to do a razor s job

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The answer already posted will work  If you want to use the jQuery  not you can do this   if    this  is   not  checked       or  if    this  attr  checked      false

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The Answer already posted  But We can use the jquery in  this way also  demo    function            check1   click function             if     check1   attr  checked                alert  checked            else             alert  unchecked                     check2   click function             if      check2   attr  checked                alert  unchecked            else             alert  checked

User · Answer

Try this   if    this  is   checked      demo

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document  ready function                 check1   click function                 var checked     this  is   checked                if  checked                    alert  checked                  else                   alert  unchecked

User · Answer

Check out some of the answers to this question - I think it might apply to yours   how to run click function after default behaviour of a element  I think you re running into an inconsistency in the browser implementation of the onclick function   Some choose to toggle the checkbox before the event is fired and some after

[jquery] Check if checkbox is NOT checked on click - jQuery

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