jQuery: Test if checkbox is NOT checked

Question

I\'m having trouble figuring this out. I have two checkboxes (in the future will have more):

• checkSurfaceEnvironment-1
• checkSurface

Answer 1

I was looking for a more direct implementation like avijendr suggested.

I had a little trouble with his/her syntax, but I got this to work:

if ($('.user-forms input[id*="chkPrint"]:not(:checked)').length > 0)

In my case, I had a table with a class user-forms, and I was checking if any of the checkboxes that had the string checkPrint in their id were unchecked.

Answer 2

An alternative way:

Here is a working example and here is the code, you should also use prop.

$('input[type="checkbox"]').mouseenter(function() { 
    if ($(this).is(':checked')) {
        //$(this).prop('checked',false);
        alert("is checked");
    } else {
         //$(this).prop('checked',true);
        alert("not checked");
    }
});​

I commented out the way to toggle the checked attribute.

Answer 3

if($("#checkbox1").prop('checked') == false){
    alert('checkbox is not checked');
    //do something
}
else
{ 
    alert('checkbox is checked');
}

Answer 4

You can also use either jQuery .not() method or :not() selector:

if ($('#checkSurfaceEnvironment').not(':checked').length) {
    // do stuff for not selected
}

JSFiddle Example

---

Additional Notes

From the jQuery API documentation for the :not() selector:

The .not() method will end up providing you with more readable selections than pushing complex selectors or variables into a :not() selector filter. In most cases, it is a better choice.

Answer 5

Here I have a snippet for this question.

$(function(){
   $("#buttoncheck").click(function(){
        if($('[type="checkbox"]').is(":checked")){
            $('.checkboxStatus').html("Congratulations! "+$('[type="checkbox"]:checked').length+" checkbox checked");
        }else{
            $('.checkboxStatus').html("Sorry! Checkbox is not checked");
         }
         return false;
   })
    
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form>
  <p>
    <label>
      <input type="checkbox" name="CheckboxGroup1" value="checkbox" id="CheckboxGroup1_0">
      Checkbox</label>
    <br>
    <label>
      <input type="checkbox" name="CheckboxGroup1_" value="checkbox" id="CheckboxGroup1_1">
      Checkbox</label>
    <br>
  </p>
  <p>
    <input type="reset" value="Reset">
    <input type="submit" id="buttoncheck" value="Check">
  </p>
  <p class="checkboxStatus"></p>
</form>

Answer 6

I know this has already been answered, but still, this is a good way to do it:

if ($("#checkbox").is(":checked")==false) {
    //Do stuff here like: $(".span").html("<span>Lorem</span>");
}