Scott and Wes dive into the cache problem, tackling user-specific data and caching security. From marketing A/B testing to content negotiation, they explore various challenges and solutions, including different URL/query parameters, edge logic, and client-side caching. Show Notes 00:00 Welcome to Syntax! 01:22 Syntax is on YouTube. 02:16 Let’s talk about the cache problem. 03:33 User-specific data and caching security. 06:27 Why might this pop up? 06:29 Marketing A/B testing - cookie based. 06:55 User-selected features - such as themes. 06:58 Language or geo-based items - accept language. 07:11 Images - WebP for some browsers, jpg for others. 07:45 JSON/HTML based on accept header. 08:17 Different encoding. 08:26 Content negotiation. 08:54 The solutions. 09:04 Provide different URLs/Query parameter. 11:19 Don’t cache the page, cache the data based on query. 15:01 Implement a “Cache Key” - one render for every option. Netlify Fastly Cloudflare 18:17 Use edge logic. 19:52 Just do it client-side. Hit us up on Socials! Syntax: