Astro

Astro is a web framework built around content. Pages are authored as components with an HTML-first template syntax, and by default the framework ships no client-side JavaScript for them. Interactive pieces are declared individually and hydrated on their own. The island model is the core idea: a page is mostly static HTML, and any component that needs interactivity is marked as an island with a hydration directive. That island can be written in React, Vue, Svelte, Solid, or plain JavaScript, and different islands on the same page can use different frameworks. The framework also ships a content collections API that validates front-matter against a schema at build time. Astro suits marketing sites, documentation, blogs, and content-heavy storefronts where interaction is limited to a few widgets. It is a poorer fit for applications where most of the interface is stateful and interactive, because the island boundaries then multiply and the static-first advantage shrinks.