<script>
// Super fast method of adding "js" class
// http://www.456bereastreet.com/archive/201209/tell_css_that_javascript_is_available_asap/
document.documentElement.className = document.documentElement.className.replace(/(\s|^)no-js(\s|$)/, '$1js$2');
</script>
Add the following to the
header.php
file