What is SvelteKit?
The full-stack framework BYOB generates: Svelte 5 components with server rendering, file-based routing, and edge deployment. Standard code any developer can extend outside the builder.
Example
A generated marketing site is routes for pages, a layout for chrome, server endpoints for forms — open it in any editor and it reads like a well-built SvelteKit app, because it is one.
Related terms
Svelte Runes
The `$state`, `$derived`, `$effect`, and `$props` primitives powering Svelte 5 reactivity. Runes are mandatory in generated code: explicit, compilable, and consistent across every component.
File-Based Routing
Pages defined by file location: `+page.svelte` renders, `+layout.svelte` wraps, `+server.js` serves data. The route tree is the app map — no separate router config to drift.
Server-Side Rendering
Rendering full HTML on the server per request so crawlers and users receive complete content immediately. The SEO-safe default for content pages in frameworks like SvelteKit and Next.js.
Load Function
Server-side data loading for a route before it renders. Load on the server for content crawlers and users need immediately; reach for client fetching only for interactive extras.
Form Actions
Progressive-enhancement mutations: forms that work without JavaScript and upgrade with it. The default for generated app mutations — resilient and accessible by construction.
Server Endpoint (+server.js)
The privileged layer for webhooks, secrets, and server-only logic. Anything touching keys, tokens, or private APIs lives here — never in components.
Sources
Further reading
How BYOB Uses SvelteKit: Why We Chose Svelte for AI Website Building
BYOB generates SvelteKit applications because of smaller bundle sizes, simpler syntax, and built-in routing. Learn why we picked SvelteKit over React, Vue, and Next.js for AI-powered development.
SvelteKit Best Practices for 2024
Master the latest SvelteKit patterns and techniques to build faster, more maintainable web applications.