Serve Static Content from a Cookieless Domain (Deprecated)

This is another, mostly deprecated, web page optimization, but you still may come across this message in different website speed test tools. This optimization applies to static content, like images, JavaScript, and CSS. When these resources are requested, there is no reason for a HTTP cookie to be attached to it. This just creates unnecessary traffic, and the browser just ignores it anyway. This optimization is mostly deprecated because of updates with the HTTP/2, plus cookies are small in terms of file size, so it is not much of a concern.

However, there are still methods to consider if you want to serve content from a cookieless domain. For example, if you are utilizing a CDN for serving content, a lot of CDN providers will automatically take care of this and will remove the set-cookie response header. Just make sure to check with your provider on how to set this up correctly. Lastly, another method that you can use is to set up a specific subdomain to serve your static content. WordPress, for example, provides the option to set up a subdomain that points to your domain, however, this method requires a bit more configuration and not as straightforward as the other options.