HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>boolean toggle</title>

  <style>

    body { font-family: sans-serif; padding: 16px; max-width: 520px; }

    p { background: #fef3c7; padding: 8px; border-radius: 6px; display: none; }

    button { padding: 10px 16px; background: #6366f1; color: #fff; border: none; border-radius: 6px; cursor: pointer; }

    #hint { color: #64748b; font-size: 14px; margin-top: 10px; }

  </style>

</head>

<body>

  <button type="button">Toggle</button>

  <p>Hello</p>

  <p>Good Bye</p>

  <p id="hint">Paragraphs start hidden. Click to force show, then hide.</p>

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

  <script>

    var flip = 0;

    $("button").on("click", function() {

      var show = flip++ % 2 === 0;

      $("p").not("#hint").toggle(show);

      $("#hint").text(show ? "toggle(true) — showing all" : "toggle(false) — hiding all");

    });

  </script>

</body>

</html>

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jQuery .toggle() — boolean force (Try It)