Astro

Overview

Astro is a web framework for building content-driven websites that ships zero JavaScript by default. Its island architecture hydrates only interactive components, achieving excellent Lighthouse scores while supporting React, Vue, Svelte, or any UI framework where interactivity is needed.

Instructions

• When creating pages, use file-based routing in src/pages/ with .astro, .md, or .mdx files, and organize shared structure in src/layouts/.
• When adding interactivity, use client directives on framework components: prefer client:visible or client:idle over client:load since most components do not need immediate hydration.
• When managing content, define Content Collections in src/content/ with strict Zod schemas using defineCollection(), and query with getCollection() and getEntry().
• When choosing rendering modes, default to static (SSG) for marketing and content pages, use output: "server" for dynamic pages, or use hybrid rendering with per-page export const prerender = false.
• When optimizing images, use the <Image> component from astro:assets for automatic format conversion (WebP/AVIF), resizing, and lazy loading instead of raw <img> tags.
• When adding page transitions, enable View Transitions with <ViewTransitions /> for SPA-like navigation without shipping a client-side router.
• When integrating UI frameworks, install the appropriate integration (@astrojs/react, @astrojs/vue, @astrojs/svelte) and use Astro components for static content, reaching for framework components only when interactivity is required.

Examples

Example 1: Build a blog with Content Collections