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Part 2 / Concepts / What is SvelteKit?

So far, we've been working on individual components, or groups of components, in isolation. But to build a complete app, you need more than just components.

That's where SvelteKit comes in. Whereas Svelte is a component framework, SvelteKit is an app framework (or 'metaframework', depending on who you ask) that solves the tricky problems of building something production-ready:

  • Routing
  • Server-side rendering
  • Data fetching
  • Service workers
  • TypeScript integration
  • Prerendering
  • Single-page apps
  • Library packaging
  • Optimised production builds
  • Deploying to different hosting providers
  • ...and so on

It also provides a world-class development experience powered by Vite. SvelteKit apps are server-rendered by default (like traditional 'multi-page apps' or MPAs) for excellent first load performance and SEO characteristics, but can then transition to client-side navigation (like modern 'single-page apps' or SPAs) to avoid jankily reloading everything (including things like third-party analytics code) when the user navigates. They can run anywhere JavaScript runs, though — as we'll see — your users may not need to run any JavaScript at all.

If that sounds complicated, worry not: you've been using SvelteKit this whole time!

Next: Project structure

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