sveltejs/kit @sveltejs/kit@3.0.0-next.0 on GitHub

breaking: TypeScript 6 is now the minimum required version (#15930)
breaking: upgrade to cookie v1. Cookie names must now contain only ASCII characters (#13386)
breaking: require Node 22 or newer (#12548)
breaking: remove the preloadStrategy option. modulepreload will always be used (#15256)
breaking: default the cookie path option to '/' (#15398)
breaking: remove @sveltejs/kit/node/polyfills (#15430)
breaking: add config.kit.output.linkHeaderPreload to preload using the Link header (#15939)
breaking: require @sveltejs/vite-plugin-svelte v7 (#15371)
breaking: remove createEntries from the Builder object passed to adapter functions (#15509)
breaking: remove the deprecated CSRF checkOrigin option in favor of trustedOrigins (#15437)
breaking: the delta property now only exists for popstate navigation events (#15522)
breaking: remove deprecated pragma header in version polling for improved CORS support (#15428)
breaking: require Svelte 5.48.0 or newer (#15371)
chore: change error, isHttpError, redirect, and isRedirect to refer to public type instead of internal class (#15250)
breaking: require Vite 8. Provides new functionality even for existing Vite 8 users such as faster builds with Vite hook filters and more powerful SvelteKit adapters with the Vite environment API (#15371)
breaking: remove data-sveltekit-* option 'off' in favour of false (#15907)

feat: resolve paths using the Vite config root option instead of process.cwd() to better support monorepo configurations such as Vitest workspaces (#15469)
chore: deprecate Response helpers in favor of platform-provided alternatives (#15448)
feat: explicit env vars (#15934)

fix: remove check for svelte.config.js before running sync (#15946)
fix: generate a placeholder tsconfig.json to squelch sync-time warnings (#15948)
chore: remove dependency on kleur (#12548)
chore: remove dependency on set-cookie-parser (#15384)
fix: allow use of $app/env/public in service workers (#15950)