977: We built a CSS Challenge platform episode artwork

EPISODE · Feb 9, 2026 · 41 MIN

977: We built a CSS Challenge platform

from Syntax - Tasty Web Development Treats · host Wes Bos & Scott Tolinski - Full Stack JavaScript Web Developers

Scott and Wes break down how they built SynHax, the real-time CSS Battle app powering the upcoming Mad CSS tournament. From SvelteKit and Zero to diffing algorithms, sync conflicts, and a last-minute hackweek glow-up, this one’s a deep dive into shipping ambitious web apps fast. Show Notes 00:00 Welcome to Syntax! 00:50 March Mad CSS Tournament. 03:19 Brought to you by Sentry.io. 03:59 What the heck is a CSS Battle? 05:34 The tech stack. 06:30 Svelte Kit. 06:44 Zero Sync. Zero Docs Zero Svelte. 07:32 Drizzle. 07:58 Supabase. 08:23 Graffiti. 10:45 Sync Server. 12:10 Cloudflare Workers. 12:23 Local File System. 13:26 How Zero Works. 13:48 Zero Sync Client. 15:39 API server. 19:34 Dealing with states and conflicts. 24:25 The Hackweek Project. 25:29 The Diffing Algorithm. 35:22 The bugs. Hit us up on Socials! Syntax: X Instagram Tiktok LinkedIn Threads Wes: X Instagram Tiktok LinkedIn Threads Scott: X Instagram Tiktok LinkedIn Threads Randy: X Instagram YouTube Threads

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977: We built a CSS Challenge platform

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