<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
body {
  -webkit-writing-mode: vertical-rl;
  writing-mode: vertical-rl;
  font: 16px/24px sans-serif;
  padding: 20px;
  width: 300px;
  height: 400px;
}
.sideways {
  -webkit-text-orientation: sideways-right;
  text-orientation: sideways-right;
}
.upright {
  -webkit-text-orientation: upright;
  text-orientation: upright;
}
</style>
</head>

<body>
<div class=sideways>
Bidi עברית text
</div>

<div dir=rtl class=sideways>
Bidi עברית text
</div>

<div class=upright>
Bidi עברית text
</div>

<div dir=rtl class=upright>
Bidi עברית text
</div>

</body>
</html>