In April 2025, Zac developed and exported a ClientOnly component for the TanStack/router repository, addressing server-side rendering challenges by ensuring content is rendered only after client-side JavaScript loads, thus preventing hydration errors and improving rendering flow. He also fixed broken documentation links in the TanStack/query React docs, restoring reliable navigation for users seeking examples and guides. His work involved JavaScript, TypeScript, and Markdown, with a focus on front end development, documentation, and testing. Zac’s contributions demonstrated a practical approach to solving runtime and documentation issues, enhancing both the stability of SSR-enabled applications and the overall developer experience.