Notes, demos, and things I build.https://gelpes.devhttps://gelpes.dev/#interactive-demoshttps://gelpes.dev/#interactive-demosHow a React island lives inside a Markdown post without slowing the rest of the site.Wed, 19 Aug 2026 00:00:00 GMThttps://gelpes.dev/#hello-worldhttps://gelpes.dev/#hello-worldWhy this site exists and how it is built.Tue, 18 Aug 2026 00:00:00 GMT