gatsbyjs/gatsby

Gatsby is a JavaScript framework for building fast websites and web applications using React. It sits in a category called static site generators, tools that pre-build your website's pages at compile time rather than generating them fresh on every user request. This approach makes pages load very quickly because they can be served directly from a content delivery network (CDN) without any server processing. The problem Gatsby solves is that building a fast, well-optimized website from scratch is hard. Code splitting, image optimization, lazy loading, prefetching the next page before a user clicks, these are all performance techniques that Gatsby handles automatically so you do not have to configure them yourself. How Gatsby works: you build your site using React components, which are the standard building blocks of modern web UIs. Gatsby has a powerful plugin system and a GraphQL-based data layer that can pull content from virtually anywhere, Markdown files, headless CMS platforms like Contentful or WordPress, databases, REST or GraphQL APIs. During the build step, Gatsby queries all those data sources, generates HTML for every page, and produces a package of optimized assets ready to deploy. For pages that need dynamic data (like user-specific dashboards), Gatsby also supports server-side rendering and deferred generation on a per-page basis. You would use Gatsby for content-heavy websites like blogs, documentation sites, marketing pages, and e-commerce storefronts where fast page loads and good SEO matter. The tech stack is JavaScript/TypeScript, React, and GraphQL, all running on Node. Sites can be deployed for free to platforms like Netlify or Vercel without needing any server infrastructure.