javascript - How to find the length of checkbox checked inputs? -


this question has answer here:

all find length of checked checkboxes.

  • my codepen

  • in codepen have created sample reference, can able find length while clicking on check box, looking while clicking of all input check box, checkbox should checked.

  • for example: while click (or) checked rose input check box result of length shows 1, when click (or) checked input check box expecting result should 4, when clicking on all check box input rose, white, blue need checked.

  • how while clicking on 1 input check box others check box need checked?.

html:

<div id="checkboxlength" class="css">    <div class="blue">     <input type="checkbox"><span>all</span>   </div>  <div> <input type="checkbox" ><span>rose</span>  </div>   <div>    <input type="checkbox" ><span>blue</span>    </div>   <div>    <input type="checkbox"><span>white</span>     </div>  <div class="green">    <span  id="count-checked-checkboxes">0</span> checked     </div>  </div>

java script:

    $(document).ready(function(){      var $checkboxes = $('#checkboxlength  input[type="checkbox"]');      $checkboxes.change(function(){         var countcheckedcheckboxes = $checkboxes.filter(':checked').length;         $('#count-checked-checkboxes').text(countcheckedcheckboxes);          $('#edit-count-checked-checkboxes').val(countcheckedcheckboxes);     });  });

id:

checkboxlength

result code:

<div>      <span  id="count-checked-checkboxes">0</span> checked     </div>

you can add id or class check all checkbox, can eliminate while counting checked checkboxes , detect while clicked can check/uncheck others checkboxes.

var $checkboxes = $('#checkboxlength  input[type="checkbox"]');  $checkboxes.change(function(){      /*if clicked checkbox has check_all id       check other checkboxes if 1 checked        , vise versa */      if($(this).is("#check_all"))          $checkboxes.prop('checked',$(this).prop('checked'));                $('#count-checked-checkboxes').text($checkboxes.filter(':checked').length);  });
.css{    display:flex;    justify-content:center;    align-items:center;    flex-direction:column;  }  .green{    color:red;  }    .blue{    color:blue;  }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>  <div id="checkboxlength" class="css">     <div class="blue"><input type="checkbox" id="check_all"><span>all</span></div>     <div><input type="checkbox" ><span>rose</span></div>     <div><input type="checkbox" ><span>blue</span> </div>     <div><input type="checkbox"><span>white</span> </div>     <div class="green"><span  id="count-checked-checkboxes">0</span> checked</div>  </div>


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