JS CSS
(quick guide & examples)
<style> .nohigh { user-select: none; } .nohigh::selection { background: transparent; } </style>
<p class="nohigh"> You shall not SELECT! </p>
<script> var all = document. getElementsByClassName("nohigh"); for (let a of all) { a.onselectstart = () => false; } </script>
<p class="nohigh"> You shall not SELECT! </p>