non-passive event listener to a scroll-blocking 'touchstart' event #3072

bootstrapdisruptive · 2024-07-16T07:07:35Z

bootstrapdisruptive
Jul 16, 2024

Hi,

I use a very basic dropdown (see code below). The chrome developer tools alert it as non-passive. What do I need to do?

[Violation] Added non-passive event listener to a scroll-blocking 'touchstart' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952

<!DOCTYPE html>
<html lang="de">
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">

    <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.min.js"></script>
    <link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/semantic.min.css">
    <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/semantic.min.js"></script>

    <script>
    $(function() {      
      $('.ui.dropdown').dropdown();
    });
    </script>    
    
  </head>
  <body>

    <div class="ui selection dropdown">
      <input type="hidden" name="pet">
      <i class="dropdown icon"></i>
      <div class="default text">Pet</div>
      <div class="scrollhint menu">
        <div class="item" data-value="0">Cat</div>
        <div class="item" data-value="1">Dog</div>
        <div class="item" data-value="2">Bird</div>
        <div class="item" data-value="3">Rabbit</div>
        <div class="item" data-value="4">Squirrel</div>
        <div class="item" data-value="5">Horse</div>
        <div class="item" data-value="6">Turtle</div>
        <div class="item" data-value="7">Parrot</div>
      </div>
    </div>

  </body>
</html>