<html>
<head>
<style>
div {
  text-transform: uppercase;
}

div:first-letter {
  text-transform: uppercase;
}

p::before {
  content: "This text should be uppercase.";
  text-transform: uppercase;
}

</style>
</head>
<body>
<div>This text should be uppercase.</div>
<p></p>
