JSFiddle - React, Tailwind, and code Playground
HTML
<html>
<body>
</body>
<div id="mobile-footer">
Test this shit
</div>
</html>
JavaScript
$('#mobile-footer').css('border', '3px solid red');
<html>
<body>
</body>
<div id="mobile-footer">
Test this shit
</div>
</html>
$('#mobile-footer').css('border', '3px solid red');