css/css-pseudo/placeholder-excluded-properties.html

<!DOCTYPE html>
<title>::placeholder should not support 'writing-mode', 'direction', and 'text-orientation'</title>
<link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#placeholder-pseudo">
<link rel="help" href="https://drafts.csswg.org/css-pseudo-4/#first-line-styling">
<link rel="match" href="reference/placeholder-excluded-properties-ref.html">
<style>
.horizontal::placeholder {
  writing-mode: vertical-rl;
  direction: rtl;
}

.vertical {
  writing-mode: vertical-rl;
}
.vertical::placeholder {
  text-orientation: upright;
}
</style>
<body>
<input class="horizontal" placeholder="placeholder">
<input class="vertical" placeholder="placeholder">
</body>