Astro re-popularized the idea of shipping zero JavaScript by default. The island architecture lets you hydrate only the interactive parts of a page.
Why islands win
Static content renders as pure HTML. Interactive components load on demand, which keeps the initial bundle tiny and improves Core Web Vitals scores.
---import Counter from "../components/Counter.jsx";---Content collections
Use content collections to type-check your Markdown frontmatter and get schema validation for every blog post you write.