Reading js file at desktop without mobile devices in laravel

I'm trying to not showing js file at mobile devices and that code working with me at html file :

if (window.matchMedia("(min-width: 768px)").matches) {
  document.write('<script type="text/javascript" src="website/js/nav.js"><\/script>');
}

But when i'm using that at larvel it doesn't !

How can i pass this code at laravel file ?

via Dina Shaldoum