<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Progressive_enhancement" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Progressive_enhancement</a>
<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Fault_tolerance" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Fault_tolerance</a><p>No need to do browser detection. Just make your site work without JS as well :)