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Frameworks & web · #astro
Combine Astro content collections with a Zod schema and the paginate() helper to get type-checked frontmatter, draft filtering, and fully static /blog/N pages at build time.
Learn how Astro Islands let you keep a blog’s article static while hydrating only interactive pieces like a comment form, reducing JavaScript payload and improving load times.
Markup renders but nothing is clickable? That's a failed island hydration in Astro v4. This diagnostic guide maps symptoms to causes — missing client directives, SSR-unsafe browser APIs, export mistakes — with ordered checks and fixes.
Astro's island architecture hydrates only the interactive components you explicitly mark, shipping zero framework JavaScript for static content. This guide explains the mechanism, directive choices, composition patterns, and common pitfalls with a worked example.
Learn how to lazy‑hydrate Astro islands with the client:visible directive to reduce initial JavaScript, improve LCP and FID, and keep interactive components ready when users scroll into view.
Astro's client:only directive keeps heavy interactive components out of the initial JavaScript bundle by skipping server-side rendering entirely. Learn when to use it, how to provide fallbacks, and the SEO trade-offs you need to weigh.
Learn how to diagnose and fix hydration mismatch errors in Astro when using React, Vue, or Svelte components with client directives.
Astro middleware runs on every SSR or hybrid request before page rendering and API routes. When deployed with an edge adapter such as Cloudflare Workers, Vercel Edge Functions or Netlify Edge Functions, the middleware executes inside the runtime's isolate model. The pipeline is serial by design, with each middleware awaiting next(). Under concurrent requests
An architecture note on Astro Islands: how to isolate interactive components, keep static HTML fast, and verify selective hydration in practice.
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