如何检查要检查的复选框？

Question

I have 2 checkboxes. I need one, not both, but at least 1 to be checked . It is not a multiple selection but zero is not accepted. If one is checked, this line will work jQuery('#wiz_menu.nav-tabs > .active').next('li').find('a').trigger('click'); otherwise it should alert. The following makes it alerting all the time.

UPDATE

I am not using the submit button or I would have used the validate plugin . It is a normal button to go next in the wizard <button type="button" class="btnNext">Next step</button>

HTML

<div class="form-group">
    <label for="usp-category-8" class="usp-checkbox usp-cat usp-cat-0">
        <input type="checkbox" name="usp-category[]" id="usp-category-8" value="8" data-required="true" class="usp-input usp-input-category"> 
        Cultura
    </label>
    <label for="usp-category-7" class="usp-checkbox usp-cat usp-cat-0">
        <input type="checkbox" name="usp-category[]" id="usp-category-7" value="7" data-required="true" class="usp-input usp-input-category"> 
        Scienze
    </label>
    <input type="hidden" name="usp-category-required" value="1">
</div>

JS

jQuery('.btnNext').on("click", function(){
  if(jQuery(".tab-pane").is("#step1")) {
    var isChecked = false;
    $('input[type=checkbox]').on("change", function () {
      isChecked = true;
    });
    if ( isChecked ) {
      jQuery('#wiz_menu.nav-tabs > .active').next('li').find('a').trigger('click');
    } else {
      alert( 'Please, check at least one checkbox!' );
    }  
  }
});

Answer 1

With jQuery you can use is :

 $('#form').on('submit', function(e) { e.preventDefault(); if ($('input[name="hi"]').is(':checked')) { console.log('checked'); } }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <form id="form"> <input type="checkbox" name="hi" value="hi">Hallo<br> <input type="checkbox" name="gb" value="gb">Tschuss<br> <input type="submit" value="Submit"> </form> 

Adapted to your code:

 $('.btnNext').click(function(e) { e.preventDefault(); if ($('#usp-category-7').is(':checked') || $('#usp-category-8').is(':checked')) { console.log('at least one is checked'); } }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div class="form-group"> <label for="usp-category-8" class="usp-checkbox usp-cat usp-cat-0"> <input type="checkbox" name="usp-category[]" id="usp-category-8" value="8" data-required="true" class="usp-input usp-input-category"> Cultura </label> <label for="usp-category-7" class="usp-checkbox usp-cat usp-cat-0"> <input type="checkbox" name="usp-category[]" id="usp-category-7" value="7" data-required="true" class="usp-input usp-input-category"> Scienze </label> <input type="hidden" name="usp-category-required" value="1"> <button class="btnNext">Next</button> </div> 

Answer 2

Thanks to a comment, I personally resolved it like this, making them radio buttons. But I will accept the other answer as it is correct.

jQuery('.btnNext').on("click", function(){
  if(jQuery(".tab-pane").is("#step1")) {
   if($('input[type=radio').is(':checked')) {
      jQuery('#wiz_menu.nav-tabs > .active').next('li').find('a').trigger('click');
    } else {
      alert( 'Please, check at least one checkbox!' );
    }  
  }
});