title: How to serve a .JPG for browser that not support .webp in a proper way?
body: <p>I am planning to use <code>WebP</code> on my E-Commerce website.It can boost a performance a lot based on Lighthouse test. But the problem is. we still have user that use iOS which does't have support for <code>WebP</code> format. I need more information about the <strong>proper</strong> way to deliver the images also how to let user download the images in JPG. </p>
  
  <p>On my server. I have both formats for fallback purpose.</p>