Count number of li element and add class2019 Community Moderator ElectionHow do I detect a click outside an...

Professor being mistaken for a grad student

A single argument pattern definition applies to multiple-argument patterns?

As a new Ubuntu desktop 18.04 LTS user, do I need to use ufw for a firewall or is iptables sufficient?

Brexit - No Deal Rejection

Is it normal that my co-workers at a fitness company criticize my food choices?

I am confused as to how the inverse of a certain function is found.

Meme-controlled people

How to write cleanly even if my character uses expletive language?

Do I need to be arrogant to get ahead?

Are Roman Catholic priests ever addressed as pastor

Python if-else code style for reduced code for rounding floats

New passport but visa is in old (lost) passport

Why do tuner card drivers fail to build after kernel update to 4.4.0-143-generic?

What is the relationship between relativity and the Doppler effect?

Official degrees of earth’s rotation per day

Why is the President allowed to veto a cancellation of emergency powers?

How to deal with taxi scam when on vacation?

Recruiter wants very extensive technical details about all of my previous work

Fastest way to pop N items from a large dict

How to explain that I do not want to visit a country due to personal safety concern?

Describing a chess game in a novel

et qui - how do you really understand that kind of phraseology?

How to terminate ping <dest> &

Non-trivial topology where only open sets are closed



Count number of li element and add class



2019 Community Moderator ElectionHow do I detect a click outside an element?Add table row in jQueryHow do I check if an element is hidden in jQuery?How to change an element's class with JavaScript?Event binding on dynamically created elements?Creating a div element in jQueryHow can I select an element with multiple classes in jQuery?How to move an element into another element?How do I remove a particular element from an array in JavaScript?jQuery scroll to element












13















I am trying to count li elements, and addClass to another div.



For example:






$('.box2').addClass(function(){
return 'list' + $(this).find('.box1 li').length;
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="box1">
<li>a</li>
<li>b</li>
<li>c</li>
</ul>


<div class="box2">text</div>





This should be like this



<div class="box2 list3">text</div>


But I don't know why when I check on the DOM code,



<div class="box2 list0">text</div>


I get this result.



What do I need to fix the code?
Please help.










share|improve this question




















  • 2





    Your $(this) is not pointing to .box2 as you expect

    – Mr. Alien
    Mar 11 at 5:41











  • @Mr.Alien It is what it actually does, pointing to .box2, hence not working as expected as there is no .box1 after it.

    – LGSon
    Mar 11 at 5:59













  • It would be great to add $(document).ready(function(){, around your JQuery operations,

    – harish sharma
    Mar 11 at 6:38
















13















I am trying to count li elements, and addClass to another div.



For example:






$('.box2').addClass(function(){
return 'list' + $(this).find('.box1 li').length;
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="box1">
<li>a</li>
<li>b</li>
<li>c</li>
</ul>


<div class="box2">text</div>





This should be like this



<div class="box2 list3">text</div>


But I don't know why when I check on the DOM code,



<div class="box2 list0">text</div>


I get this result.



What do I need to fix the code?
Please help.










share|improve this question




















  • 2





    Your $(this) is not pointing to .box2 as you expect

    – Mr. Alien
    Mar 11 at 5:41











  • @Mr.Alien It is what it actually does, pointing to .box2, hence not working as expected as there is no .box1 after it.

    – LGSon
    Mar 11 at 5:59













  • It would be great to add $(document).ready(function(){, around your JQuery operations,

    – harish sharma
    Mar 11 at 6:38














13












13








13








I am trying to count li elements, and addClass to another div.



For example:






$('.box2').addClass(function(){
return 'list' + $(this).find('.box1 li').length;
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="box1">
<li>a</li>
<li>b</li>
<li>c</li>
</ul>


<div class="box2">text</div>





This should be like this



<div class="box2 list3">text</div>


But I don't know why when I check on the DOM code,



<div class="box2 list0">text</div>


I get this result.



What do I need to fix the code?
Please help.










share|improve this question
















I am trying to count li elements, and addClass to another div.



For example:






$('.box2').addClass(function(){
return 'list' + $(this).find('.box1 li').length;
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="box1">
<li>a</li>
<li>b</li>
<li>c</li>
</ul>


<div class="box2">text</div>





This should be like this



<div class="box2 list3">text</div>


But I don't know why when I check on the DOM code,



<div class="box2 list0">text</div>


I get this result.



What do I need to fix the code?
Please help.






$('.box2').addClass(function(){
return 'list' + $(this).find('.box1 li').length;
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="box1">
<li>a</li>
<li>b</li>
<li>c</li>
</ul>


<div class="box2">text</div>





$('.box2').addClass(function(){
return 'list' + $(this).find('.box1 li').length;
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="box1">
<li>a</li>
<li>b</li>
<li>c</li>
</ul>


<div class="box2">text</div>






javascript jquery html css






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 11 at 10:27









Helenesh

1,2901123




1,2901123










asked Mar 11 at 5:38









kk kkkk kk

1447




1447








  • 2





    Your $(this) is not pointing to .box2 as you expect

    – Mr. Alien
    Mar 11 at 5:41











  • @Mr.Alien It is what it actually does, pointing to .box2, hence not working as expected as there is no .box1 after it.

    – LGSon
    Mar 11 at 5:59













  • It would be great to add $(document).ready(function(){, around your JQuery operations,

    – harish sharma
    Mar 11 at 6:38














  • 2





    Your $(this) is not pointing to .box2 as you expect

    – Mr. Alien
    Mar 11 at 5:41











  • @Mr.Alien It is what it actually does, pointing to .box2, hence not working as expected as there is no .box1 after it.

    – LGSon
    Mar 11 at 5:59













  • It would be great to add $(document).ready(function(){, around your JQuery operations,

    – harish sharma
    Mar 11 at 6:38








2




2





Your $(this) is not pointing to .box2 as you expect

– Mr. Alien
Mar 11 at 5:41





Your $(this) is not pointing to .box2 as you expect

– Mr. Alien
Mar 11 at 5:41













@Mr.Alien It is what it actually does, pointing to .box2, hence not working as expected as there is no .box1 after it.

– LGSon
Mar 11 at 5:59







@Mr.Alien It is what it actually does, pointing to .box2, hence not working as expected as there is no .box1 after it.

– LGSon
Mar 11 at 5:59















It would be great to add $(document).ready(function(){, around your JQuery operations,

– harish sharma
Mar 11 at 6:38





It would be great to add $(document).ready(function(){, around your JQuery operations,

– harish sharma
Mar 11 at 6:38












5 Answers
5






active

oldest

votes


















12














Your query looks for .box1 li within .box2, though these two elements are siblings. Therefore, your find() query will always return 0.



For your query to work, your HTML would need to look like this:



<div class="box2">text
<ul class="box1">
<li>a</li>
<li>b</li>
<li>c</li>
</ul>
</div>


Without altering the structure of your HTML, you can get this to work by accessing .box1 li directly:






$('.box2').addClass(function(){
return 'list' + $('.box1 li').length;
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="box1">
<li>a</li>
<li>b</li>
<li>c</li>
</ul>

<div class="box2">text</div>








share|improve this answer


























  • This explanation is wrong, even if box2 was before box1, $(this) evaluates to div box2 and looks for .box1 li among box2's descendants

    – barbsan
    Mar 11 at 10:17








  • 1





    @barbsan Thanks for the feedback. I've updated the example with a more thorough explanation.

    – Andy Hoffman
    Mar 11 at 10:34



















7














Here $(this) is referring to box2 element.Only $('.box1 li').length is what you required






$('.box2').addClass(function() {
return 'list_' + $('.box1 li').length;
});

.list_3 {
color: green;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="box1">
<li>a</li>
<li>b</li>
<li>c</li>
</ul>
<div class="box2">text</div>








share|improve this answer

































    4














    this is not pointing to the element you are thinking, it is referring to DIV element on which the addClass() is invoked and this element does not have .box1 li. Thus find() is failing to refer your intended element.



    Simply use:



    $('.box1 li').length 





    $('.box2').addClass(function(){
    console.log(this.nodeName); // DIV
    return 'list' + $('.box1 li').length;
    });

    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    <ul class="box1">
    <li>a</li>
    <li>b</li>
    <li>c</li>
    </ul>
    <div class="box2">text</div>








    share|improve this answer

































      4














      $(this).find will find the li in the div with box2 class which are not present. Instead check this in the div with box1 class and find the li elements






      $('.box2').addClass(function(){
      return 'list' + $('.box1').find('li').length;
      });

      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
      <ul class="box1">
      <li>a</li>
      <li>b</li>
      <li>c</li>
      </ul>


      <div class="box2">text</div>








      share|improve this answer

































        1














        You can simply do this by following method






        $('.box2').addClass('list' + $('.box1 li').length);

        <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
        <ul class="box1">
        <li>a</li>
        <li>b</li>
        <li>c</li>
        </ul>
        <div class="box2">text</div>








        share|improve this answer























          Your Answer






          StackExchange.ifUsing("editor", function () {
          StackExchange.using("externalEditor", function () {
          StackExchange.using("snippets", function () {
          StackExchange.snippets.init();
          });
          });
          }, "code-snippets");

          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "1"
          };
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function() {
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled) {
          StackExchange.using("snippets", function() {
          createEditor();
          });
          }
          else {
          createEditor();
          }
          });

          function createEditor() {
          StackExchange.prepareEditor({
          heartbeatType: 'answer',
          autoActivateHeartbeat: false,
          convertImagesToLinks: true,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: 10,
          bindNavPrevention: true,
          postfix: "",
          imageUploader: {
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          },
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          });


          }
          });














          draft saved

          draft discarded


















          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f55095760%2fcount-number-of-li-element-and-add-class%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown

























          5 Answers
          5






          active

          oldest

          votes








          5 Answers
          5






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          12














          Your query looks for .box1 li within .box2, though these two elements are siblings. Therefore, your find() query will always return 0.



          For your query to work, your HTML would need to look like this:



          <div class="box2">text
          <ul class="box1">
          <li>a</li>
          <li>b</li>
          <li>c</li>
          </ul>
          </div>


          Without altering the structure of your HTML, you can get this to work by accessing .box1 li directly:






          $('.box2').addClass(function(){
          return 'list' + $('.box1 li').length;
          });

          <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
          <ul class="box1">
          <li>a</li>
          <li>b</li>
          <li>c</li>
          </ul>

          <div class="box2">text</div>








          share|improve this answer


























          • This explanation is wrong, even if box2 was before box1, $(this) evaluates to div box2 and looks for .box1 li among box2's descendants

            – barbsan
            Mar 11 at 10:17








          • 1





            @barbsan Thanks for the feedback. I've updated the example with a more thorough explanation.

            – Andy Hoffman
            Mar 11 at 10:34
















          12














          Your query looks for .box1 li within .box2, though these two elements are siblings. Therefore, your find() query will always return 0.



          For your query to work, your HTML would need to look like this:



          <div class="box2">text
          <ul class="box1">
          <li>a</li>
          <li>b</li>
          <li>c</li>
          </ul>
          </div>


          Without altering the structure of your HTML, you can get this to work by accessing .box1 li directly:






          $('.box2').addClass(function(){
          return 'list' + $('.box1 li').length;
          });

          <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
          <ul class="box1">
          <li>a</li>
          <li>b</li>
          <li>c</li>
          </ul>

          <div class="box2">text</div>








          share|improve this answer


























          • This explanation is wrong, even if box2 was before box1, $(this) evaluates to div box2 and looks for .box1 li among box2's descendants

            – barbsan
            Mar 11 at 10:17








          • 1





            @barbsan Thanks for the feedback. I've updated the example with a more thorough explanation.

            – Andy Hoffman
            Mar 11 at 10:34














          12












          12








          12







          Your query looks for .box1 li within .box2, though these two elements are siblings. Therefore, your find() query will always return 0.



          For your query to work, your HTML would need to look like this:



          <div class="box2">text
          <ul class="box1">
          <li>a</li>
          <li>b</li>
          <li>c</li>
          </ul>
          </div>


          Without altering the structure of your HTML, you can get this to work by accessing .box1 li directly:






          $('.box2').addClass(function(){
          return 'list' + $('.box1 li').length;
          });

          <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
          <ul class="box1">
          <li>a</li>
          <li>b</li>
          <li>c</li>
          </ul>

          <div class="box2">text</div>








          share|improve this answer















          Your query looks for .box1 li within .box2, though these two elements are siblings. Therefore, your find() query will always return 0.



          For your query to work, your HTML would need to look like this:



          <div class="box2">text
          <ul class="box1">
          <li>a</li>
          <li>b</li>
          <li>c</li>
          </ul>
          </div>


          Without altering the structure of your HTML, you can get this to work by accessing .box1 li directly:






          $('.box2').addClass(function(){
          return 'list' + $('.box1 li').length;
          });

          <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
          <ul class="box1">
          <li>a</li>
          <li>b</li>
          <li>c</li>
          </ul>

          <div class="box2">text</div>








          $('.box2').addClass(function(){
          return 'list' + $('.box1 li').length;
          });

          <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
          <ul class="box1">
          <li>a</li>
          <li>b</li>
          <li>c</li>
          </ul>

          <div class="box2">text</div>





          $('.box2').addClass(function(){
          return 'list' + $('.box1 li').length;
          });

          <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
          <ul class="box1">
          <li>a</li>
          <li>b</li>
          <li>c</li>
          </ul>

          <div class="box2">text</div>






          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Mar 11 at 10:34

























          answered Mar 11 at 5:40









          Andy HoffmanAndy Hoffman

          8,72131839




          8,72131839













          • This explanation is wrong, even if box2 was before box1, $(this) evaluates to div box2 and looks for .box1 li among box2's descendants

            – barbsan
            Mar 11 at 10:17








          • 1





            @barbsan Thanks for the feedback. I've updated the example with a more thorough explanation.

            – Andy Hoffman
            Mar 11 at 10:34



















          • This explanation is wrong, even if box2 was before box1, $(this) evaluates to div box2 and looks for .box1 li among box2's descendants

            – barbsan
            Mar 11 at 10:17








          • 1





            @barbsan Thanks for the feedback. I've updated the example with a more thorough explanation.

            – Andy Hoffman
            Mar 11 at 10:34

















          This explanation is wrong, even if box2 was before box1, $(this) evaluates to div box2 and looks for .box1 li among box2's descendants

          – barbsan
          Mar 11 at 10:17







          This explanation is wrong, even if box2 was before box1, $(this) evaluates to div box2 and looks for .box1 li among box2's descendants

          – barbsan
          Mar 11 at 10:17






          1




          1





          @barbsan Thanks for the feedback. I've updated the example with a more thorough explanation.

          – Andy Hoffman
          Mar 11 at 10:34





          @barbsan Thanks for the feedback. I've updated the example with a more thorough explanation.

          – Andy Hoffman
          Mar 11 at 10:34













          7














          Here $(this) is referring to box2 element.Only $('.box1 li').length is what you required






          $('.box2').addClass(function() {
          return 'list_' + $('.box1 li').length;
          });

          .list_3 {
          color: green;
          }

          <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
          <ul class="box1">
          <li>a</li>
          <li>b</li>
          <li>c</li>
          </ul>
          <div class="box2">text</div>








          share|improve this answer






























            7














            Here $(this) is referring to box2 element.Only $('.box1 li').length is what you required






            $('.box2').addClass(function() {
            return 'list_' + $('.box1 li').length;
            });

            .list_3 {
            color: green;
            }

            <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
            <ul class="box1">
            <li>a</li>
            <li>b</li>
            <li>c</li>
            </ul>
            <div class="box2">text</div>








            share|improve this answer




























              7












              7








              7







              Here $(this) is referring to box2 element.Only $('.box1 li').length is what you required






              $('.box2').addClass(function() {
              return 'list_' + $('.box1 li').length;
              });

              .list_3 {
              color: green;
              }

              <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
              <ul class="box1">
              <li>a</li>
              <li>b</li>
              <li>c</li>
              </ul>
              <div class="box2">text</div>








              share|improve this answer















              Here $(this) is referring to box2 element.Only $('.box1 li').length is what you required






              $('.box2').addClass(function() {
              return 'list_' + $('.box1 li').length;
              });

              .list_3 {
              color: green;
              }

              <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
              <ul class="box1">
              <li>a</li>
              <li>b</li>
              <li>c</li>
              </ul>
              <div class="box2">text</div>








              $('.box2').addClass(function() {
              return 'list_' + $('.box1 li').length;
              });

              .list_3 {
              color: green;
              }

              <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
              <ul class="box1">
              <li>a</li>
              <li>b</li>
              <li>c</li>
              </ul>
              <div class="box2">text</div>





              $('.box2').addClass(function() {
              return 'list_' + $('.box1 li').length;
              });

              .list_3 {
              color: green;
              }

              <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
              <ul class="box1">
              <li>a</li>
              <li>b</li>
              <li>c</li>
              </ul>
              <div class="box2">text</div>






              share|improve this answer














              share|improve this answer



              share|improve this answer








              edited Mar 11 at 5:42

























              answered Mar 11 at 5:41









              brkbrk

              28.9k32143




              28.9k32143























                  4














                  this is not pointing to the element you are thinking, it is referring to DIV element on which the addClass() is invoked and this element does not have .box1 li. Thus find() is failing to refer your intended element.



                  Simply use:



                  $('.box1 li').length 





                  $('.box2').addClass(function(){
                  console.log(this.nodeName); // DIV
                  return 'list' + $('.box1 li').length;
                  });

                  <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                  <ul class="box1">
                  <li>a</li>
                  <li>b</li>
                  <li>c</li>
                  </ul>
                  <div class="box2">text</div>








                  share|improve this answer






























                    4














                    this is not pointing to the element you are thinking, it is referring to DIV element on which the addClass() is invoked and this element does not have .box1 li. Thus find() is failing to refer your intended element.



                    Simply use:



                    $('.box1 li').length 





                    $('.box2').addClass(function(){
                    console.log(this.nodeName); // DIV
                    return 'list' + $('.box1 li').length;
                    });

                    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                    <ul class="box1">
                    <li>a</li>
                    <li>b</li>
                    <li>c</li>
                    </ul>
                    <div class="box2">text</div>








                    share|improve this answer




























                      4












                      4








                      4







                      this is not pointing to the element you are thinking, it is referring to DIV element on which the addClass() is invoked and this element does not have .box1 li. Thus find() is failing to refer your intended element.



                      Simply use:



                      $('.box1 li').length 





                      $('.box2').addClass(function(){
                      console.log(this.nodeName); // DIV
                      return 'list' + $('.box1 li').length;
                      });

                      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                      <ul class="box1">
                      <li>a</li>
                      <li>b</li>
                      <li>c</li>
                      </ul>
                      <div class="box2">text</div>








                      share|improve this answer















                      this is not pointing to the element you are thinking, it is referring to DIV element on which the addClass() is invoked and this element does not have .box1 li. Thus find() is failing to refer your intended element.



                      Simply use:



                      $('.box1 li').length 





                      $('.box2').addClass(function(){
                      console.log(this.nodeName); // DIV
                      return 'list' + $('.box1 li').length;
                      });

                      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                      <ul class="box1">
                      <li>a</li>
                      <li>b</li>
                      <li>c</li>
                      </ul>
                      <div class="box2">text</div>








                      $('.box2').addClass(function(){
                      console.log(this.nodeName); // DIV
                      return 'list' + $('.box1 li').length;
                      });

                      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                      <ul class="box1">
                      <li>a</li>
                      <li>b</li>
                      <li>c</li>
                      </ul>
                      <div class="box2">text</div>





                      $('.box2').addClass(function(){
                      console.log(this.nodeName); // DIV
                      return 'list' + $('.box1 li').length;
                      });

                      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                      <ul class="box1">
                      <li>a</li>
                      <li>b</li>
                      <li>c</li>
                      </ul>
                      <div class="box2">text</div>






                      share|improve this answer














                      share|improve this answer



                      share|improve this answer








                      edited Mar 11 at 5:54

























                      answered Mar 11 at 5:42









                      MamunMamun

                      29.4k71931




                      29.4k71931























                          4














                          $(this).find will find the li in the div with box2 class which are not present. Instead check this in the div with box1 class and find the li elements






                          $('.box2').addClass(function(){
                          return 'list' + $('.box1').find('li').length;
                          });

                          <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                          <ul class="box1">
                          <li>a</li>
                          <li>b</li>
                          <li>c</li>
                          </ul>


                          <div class="box2">text</div>








                          share|improve this answer






























                            4














                            $(this).find will find the li in the div with box2 class which are not present. Instead check this in the div with box1 class and find the li elements






                            $('.box2').addClass(function(){
                            return 'list' + $('.box1').find('li').length;
                            });

                            <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                            <ul class="box1">
                            <li>a</li>
                            <li>b</li>
                            <li>c</li>
                            </ul>


                            <div class="box2">text</div>








                            share|improve this answer




























                              4












                              4








                              4







                              $(this).find will find the li in the div with box2 class which are not present. Instead check this in the div with box1 class and find the li elements






                              $('.box2').addClass(function(){
                              return 'list' + $('.box1').find('li').length;
                              });

                              <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                              <ul class="box1">
                              <li>a</li>
                              <li>b</li>
                              <li>c</li>
                              </ul>


                              <div class="box2">text</div>








                              share|improve this answer















                              $(this).find will find the li in the div with box2 class which are not present. Instead check this in the div with box1 class and find the li elements






                              $('.box2').addClass(function(){
                              return 'list' + $('.box1').find('li').length;
                              });

                              <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                              <ul class="box1">
                              <li>a</li>
                              <li>b</li>
                              <li>c</li>
                              </ul>


                              <div class="box2">text</div>








                              $('.box2').addClass(function(){
                              return 'list' + $('.box1').find('li').length;
                              });

                              <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                              <ul class="box1">
                              <li>a</li>
                              <li>b</li>
                              <li>c</li>
                              </ul>


                              <div class="box2">text</div>





                              $('.box2').addClass(function(){
                              return 'list' + $('.box1').find('li').length;
                              });

                              <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                              <ul class="box1">
                              <li>a</li>
                              <li>b</li>
                              <li>c</li>
                              </ul>


                              <div class="box2">text</div>






                              share|improve this answer














                              share|improve this answer



                              share|improve this answer








                              edited Mar 11 at 6:27

























                              answered Mar 11 at 5:42









                              ellipsisellipsis

                              8,0062929




                              8,0062929























                                  1














                                  You can simply do this by following method






                                  $('.box2').addClass('list' + $('.box1 li').length);

                                  <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                                  <ul class="box1">
                                  <li>a</li>
                                  <li>b</li>
                                  <li>c</li>
                                  </ul>
                                  <div class="box2">text</div>








                                  share|improve this answer




























                                    1














                                    You can simply do this by following method






                                    $('.box2').addClass('list' + $('.box1 li').length);

                                    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                                    <ul class="box1">
                                    <li>a</li>
                                    <li>b</li>
                                    <li>c</li>
                                    </ul>
                                    <div class="box2">text</div>








                                    share|improve this answer


























                                      1












                                      1








                                      1







                                      You can simply do this by following method






                                      $('.box2').addClass('list' + $('.box1 li').length);

                                      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                                      <ul class="box1">
                                      <li>a</li>
                                      <li>b</li>
                                      <li>c</li>
                                      </ul>
                                      <div class="box2">text</div>








                                      share|improve this answer













                                      You can simply do this by following method






                                      $('.box2').addClass('list' + $('.box1 li').length);

                                      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                                      <ul class="box1">
                                      <li>a</li>
                                      <li>b</li>
                                      <li>c</li>
                                      </ul>
                                      <div class="box2">text</div>








                                      $('.box2').addClass('list' + $('.box1 li').length);

                                      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                                      <ul class="box1">
                                      <li>a</li>
                                      <li>b</li>
                                      <li>c</li>
                                      </ul>
                                      <div class="box2">text</div>





                                      $('.box2').addClass('list' + $('.box1 li').length);

                                      <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
                                      <ul class="box1">
                                      <li>a</li>
                                      <li>b</li>
                                      <li>c</li>
                                      </ul>
                                      <div class="box2">text</div>






                                      share|improve this answer












                                      share|improve this answer



                                      share|improve this answer










                                      answered Mar 11 at 5:45









                                      Sarabjit SinghSarabjit Singh

                                      14812




                                      14812






























                                          draft saved

                                          draft discarded




















































                                          Thanks for contributing an answer to Stack Overflow!


                                          • Please be sure to answer the question. Provide details and share your research!

                                          But avoid



                                          • Asking for help, clarification, or responding to other answers.

                                          • Making statements based on opinion; back them up with references or personal experience.


                                          To learn more, see our tips on writing great answers.




                                          draft saved


                                          draft discarded














                                          StackExchange.ready(
                                          function () {
                                          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f55095760%2fcount-number-of-li-element-and-add-class%23new-answer', 'question_page');
                                          }
                                          );

                                          Post as a guest















                                          Required, but never shown





















































                                          Required, but never shown














                                          Required, but never shown












                                          Required, but never shown







                                          Required, but never shown

































                                          Required, but never shown














                                          Required, but never shown












                                          Required, but never shown







                                          Required, but never shown







                                          Popular posts from this blog

                                          Nidaros erkebispedøme

                                          Birsay

                                          Where did Arya get these scars? Unicorn Meta Zoo #1: Why another podcast? Announcing the arrival of Valued Associate #679: Cesar Manara Favourite questions and answers from the 1st quarter of 2019Why did Arya refuse to end it?Has the pronunciation of Arya Stark's name changed?Has Arya forgiven people?Why did Arya Stark lose her vision?Why can Arya still use the faces?Has the Narrow Sea become narrower?Does Arya Stark know how to make poisons outside of the House of Black and White?Why did Nymeria leave Arya?Why did Arya not kill the Lannister soldiers she encountered in the Riverlands?What is the current canonical age of Sansa, Bran and Arya Stark?