Bootstrap下拉框带有复选框，允许多个复选框，而不只是一个复选框

Question

I have a Bootstrap drop down menu that allows a user to add a check box next to an item in the drop down list. However, the user is able to add multiple check boxes - the desired behavior is that a user should only be able to select one check box. If a user has selected one check box the other check box should be removed.

 $("document").ready(function() { $('.dropdown-menu').on('click', function(e) { if($('.checkbox').count() > 1){ if($(this).hasClass('dropdown-menu-form')) { e.stopPropagation(); } } }); }); 

 .dropdown-menu-form { padding: 5px 10px 0; max-height: 100px; overflow-y: scroll; } 

 <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"> <div class="dropdown"> <a class="dropdown-toggle btn" data-toggle="dropdown" href="#"> Toggle dropdown <b class="caret"></b> </a> <ul class="dropdown-menu dropdown-menu-form" role="menu"> <li> <label class="checkbox"> <input type="checkbox">Checkbox 1 </label> </li> <li> <label class="checkbox"> <input type="checkbox">Checkbox 2 </label> </li> <li> <label class="checkbox"> <input type="checkbox">Checkbox 2 </label> </li> <li> <label class="checkbox"> <input type="checkbox">Checkbox 2 </label> </li> <li> <label class="checkbox"> <input type="checkbox">Checkbox 2 </label> </li> <li> <label class="checkbox"> <input type="checkbox">Checkbox 3 </label> </li> </ul> </div> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script> 

I tried to implement something with the count of the number of klass of .checkbox however that did not work. I am just looking to have the behavior if the user clicks a check box the previous check box will be removed.

Answer 1

Checkboxes are created to allow multiple checks, think of it as you can have this, that, and that . You are looking for a radio button. Radio buttons are treated as a you get this or you get that .

Try This

<li>
        <label class="radio-btn">
            <input type="radio">
            Radio 1
        </label>
    </li>

JS

$("document").ready(function() {

  $('.dropdown-menu').on('click', function(e) {
    if($('.radio-btn').count() > 1){
           if($(this).hasClass('dropdown-menu-form')) {
          e.stopPropagation();
      }
    }

  });
});