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Disappearing event listeners #767

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dolik-rce opened this issue Oct 19, 2023 · 1 comment
Open

Disappearing event listeners #767

dolik-rce opened this issue Oct 19, 2023 · 1 comment

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@dolik-rce
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I have noticed, that if I use pre-existing table and pass it to List.js, then any event listeners that were added to the original elements disappear. Little example:

<!DOCTYPE html>
<html>
  <head>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/list.js/2.3.1/list.min.js"></script>
  </head>
  <body>
    <table id="users">
      <thead>
        <tr>
          <th class="name sort" data-sort="name">Name</th>
          <th class="born sort" data-sort="born">Year</th>
        </tr>
      </thead>
      <tbody class="list">
        <tr>
          <td class="name"><span>John</span></td>
          <td class="born">1987</td>
        </tr>
        <tr>
          <td class="name"><span>Paul</span></td>
          <td class="born">1985</td>
        </tr>
        <tr>
          <td class="name"><span>Jack</span></td>
          <td class="born">1986</td>
        </tr>
      </tbody>
    </table>
    <script>
      document.querySelectorAll('span').forEach(
          span => span.addEventListener('click', (e) => e.target.style.color='red')
      );
  
      let userList = new List('users', { valueNames: [ 'name', 'born' ] });
    </script>
  </body>
</html>

This is most probably caused by using innerHTML when processing the list. It might be known bug or even intended behavior, but I haven't found any mention of this in documentation. It is unfortunately quite surprising and rather annoying.

If someone comes across this in future and looks for a workaround: Setting the callbacks in onclick attribute instead of using addEventListener('click', ...) seems to work correctly.
@clstevenson
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clstevenson commented Mar 11, 2024 •
edited
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I can confirm that this happens to me too. Specifically it happens when list.js is applied to a pre-existing table; I didn't have the same issue with pre-existing lists. (Using the onclick attribute did not work in my case.)

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@dolik-rce @clstevenson