HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>slideToggle basic</title>

  <style>

    body { font-family: sans-serif; padding: 16px; max-width: 28rem; }

    #book { padding: 16px; background: #dbeafe; border: 2px solid #2563eb; border-radius: 8px; margin-top: 12px; }

    #clickme { color: #2563eb; cursor: pointer; text-decoration: underline; }

  </style>

</head>

<body>

  <span id="clickme">Click here</span>

  <div id="book">Toggle me — slides up to hide, down to show again.</div>

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

  <script>

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

      $("#book").slideToggle("slow", function () {

        console.log("Animation complete");

      });

    });

  </script>

</body>

</html>

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jQuery .slideToggle() — basic slow toggle (Try It)