HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>insertAfter error demo</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 420px; }
    label { display: block; margin: 8px 0 4px; font-weight: 600; }
    input { padding: 8px; width: 100%; box-sizing: border-box; }
    #email-wrap { margin-top: 8px; }
    .error { color: #dc2626; font-size: 14px; margin: 4px 0; }
    button { margin-top: 12px; padding: 10px 16px; background: #2563eb; color: #fff; border: none; border-radius: 6px; cursor: pointer; }
    #hint { color: #64748b; font-size: 14px; margin-top: 10px; }
  </style>
</head>
<body>
  <div id="email-wrap">
    <label>Email <input type="email" id="email"></label>
  </div>
  <button type="button">Show validation error</button>
  <p id="hint">Build error message, then insertAfter #email-wrap.</p>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("button").on("click", function() {
      $(".error").remove();
      $("<p class='error'>").text("Email is required").insertAfter("#email-wrap");
      $("#hint").text("Error paragraph inserted as sibling after #email-wrap.");
    });
  </script>
</body>
</html>

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jQuery .insertAfter() — build then insert error (Try It)