HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>slideToggle divs counter</title>

  <style>

    body { font-family: sans-serif; padding: 16px; }

    .box { background: #b977d1; margin: 3px; width: 60px; height: 60px; float: left; border-radius: 4px; }

    .still { background: #345; width: 5px; }

    .hider { display: none; }

    span { color: red; font-weight: bold; clear: both; display: block; padding-top: 12px; }

    #aa { clear: both; margin-top: 12px; padding: 8px 14px; cursor: pointer; background: #ecfdf5; border: 1px solid #10b981; border-radius: 6px; display: inline-block; }

  </style>

</head>

<body>

  <div class="box"></div><div class="still"></div>

  <div class="box hider"></div><div class="still"></div>

  <div class="box hider"></div><div class="still"></div>

  <div class="box hider"></div>

  <p><span>0</span> toggled div callbacks fired.</p>

  <div id="aa">Toggle divs (not .still)</div>

  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>

  <script>

    $("#aa").on("click", function () {

      $("div:not(.still)").slideToggle("slow", function () {

        var n = parseInt($("span").text(), 10);

        $("span").text(n + 1);

      });

    });

  </script>

</body>

</html>

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jQuery .slideToggle() — divs with counter (Try It)