SvelteKit May 2026 Update Brings Remote Functions, TypeScript 6, and CLI Plugins

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The May 2026 SvelteKit release introduced remote functions, allowing developers to run server-side code without building a full API layer, with automatic JSON serialization and improved error handling. The update also adds official TypeScript 6 support, bringing faster incremental compilation, improved satisfies operator behavior, and template literal type inference. Developers can upgrade to TypeScript 6 by running a single npm install command, with no additional configuration required. The release further enables community plugins to be added directly through the Svelte CLI, streamlining third-party integrations. Together, these changes aim to reduce the time developers spend wiring front-ends to back-ends during typical feature rollouts.

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