Astro 5

Astro 5 Complete Guide 2026 TL;DR. Astro 5 ships zero JavaScript to the browser by default, delivers real server-side rendering with Server Islands, and replaces the old Content Collections API with a faster Content Layer. If you build content-heavy sites—marketing pages, docs, blogs—Astro is now the most practical choice in 2026, and the astro 5 complete feature set makes it production-ready for…