dyn class in HTML tag

Topics: Core
Apr 21 at 8:46 AM
Hi, I've seen that in Document.cshtml there's a pice of JS code that sets a dyn class in the HTML tag. Does anyone know what is it for?

Here's the code:
    <script>(function(d){d.className="dyn"+d.className.substring(6,d.className.length);})(document.documentElement);</script>
Regards