What this site collects
Nothing. There are no accounts, no forms and no comment system on this site, so there is nothing for it to store about you. Code Theory sets no cookies of its own and runs no analytics on any page. The advertising described below is the one exception, and it is Google's, not this site's.
Advertising
Pages carry ads served by Google AdSense. Google is a third-party vendor here: it and its partners set cookies or read device identifiers in your browser to serve ads, measure them and — depending on your settings and where you are — personalise them based on your visits to this and other sites. Code Theory does not receive that data; it goes to Google.
You can review and change what Google does with it at My Ad Center, or opt out of personalised advertising across participating vendors at aboutads.info. Google's own account of how it handles data from sites that use its services is in its partner-sites policy. Blocking third-party cookies in your browser stops the identifiers without stopping the site.
What your browser sends anyway
Pages are served by Netlify, which keeps standard server logs — an IP address, the page requested, a timestamp and a user agent — as an ordinary part of running a web server. Those logs are Netlify's, and are covered by their privacy policy.
Links to other sites
Articles link out to documentation, source repositories and demos on other sites. Once you follow one of those links you are on someone else's site, under their privacy policy, not this one.
Fonts and assets
Typefaces, stylesheets and images are served from this domain — no font CDN, no analytics endpoint. Apart from the ad tag described above, a page makes no third-party request while it renders.
Getting in touch
If you have a question about any of this, the contact page is the place to start.