HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>active on press</title>
  <style>
    body { font-family: sans-serif; padding: 16px; }
    #handle {
      padding: 14px 24px; background: #6366f1; color: #fff; display: inline-block;
      border-radius: 8px; cursor: grab; user-select: none;
      transition: transform 0.1s, box-shadow 0.1s;
    }
    #handle.active {
      background: #4338ca; transform: scale(1.05);
      box-shadow: 0 8px 24px rgba(99,102,241,0.4); cursor: grabbing;
    }
    #out { margin-top: 12px; color: #4338ca; font-weight: bold; max-width: 360px; line-height: 1.5; }
  </style>
</head>
<body>
  <div id="handle">Drag handle</div>
  <div id="out">Left-press to add .active; release anywhere to remove.</div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("#handle").mousedown(function(event) {
      if (event.which !== 1) return;
      $(this).addClass("active");
      $("#out").text("Pressed — .active added via .mousedown().");
      $(document).one("mouseup", function() {
        $("#handle").removeClass("active");
        $("#out").text("Released — .active removed on mouseup.");
      });
    });
  </script>
</body>
</html>

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jQuery .mousedown() — active state on press (Try It)