Astro is a modern frontend framework designed for building fast, optimized websites using an islands architecture and partial hydration. It renders pages with static generation by default, supports server-side rendering when needed, and runs in any environment, from static hosts to server runtimes. The engine emphasizes zero client JavaScript by default, shipping only the minimal interactive code, while enabling rich interactivity through discrete components (islands) written in frameworks like React, Vue, Svelte, or Preact. Features include a file-based routing system, built-in image optimization, flexible CSS handling with support for CSS modules and utility-first approaches, and a robust data-fetching model that integrates streamlined rendering pipelines and prerendering.

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Astro

Static-first web framework for fast, multi-page apps with islands.

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