HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>jQuery .addClass tab toggle</title>

  <style>

    .tabs { display: flex; gap: 4px; }

    .tab {

      padding: 8px 16px;

      border: 1px solid #ccc;

      background: #f5f5f5;

      cursor: pointer;

      border-radius: 4px 4px 0 0;

    }

    .tab.active { background: #2196f3; color: #fff; border-color: #2196f3; }

    .panel { padding: 16px; border: 1px solid #ccc; max-width: 320px; }

  </style>

</head>

<body>

  <div class="tabs">

    <button type="button" class="tab active" data-panel="1">Home</button>

    <button type="button" class="tab" data-panel="2">About</button>

    <button type="button" class="tab" data-panel="3">Contact</button>

  </div>

  <div class="panel" id="panel-1">Home content</div>

  <div class="panel" id="panel-2" style="display:none">About content</div>

  <div class="panel" id="panel-3" style="display:none">Contact content</div>

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

  <script>

    $(".tabs").on("click", ".tab", function() {

      $(".tab").removeClass("active");

      $(this).addClass("active");

      var id = $(this).data("panel");

      $(".panel").hide();

      $("#panel-" + id).show();

    });

  </script>

</body>

</html>

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jQuery .addClass() — toggle active tab (Try It)