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What’s new in Svelte: May 2026

Svelte CLI Community Add-ons, TypeScript 6.0 support in SvelteKit

Dani Sandoval

This month we got a ton of improvements to SvelteKit's remote functions, TypeScript 6.0 support and the experimental release of community plugins in the Svelte CLI.

Svelte was also featured in ThoughtWorks Technology Radar!

Big month, bigger showcase... so let's dive in!

What's new in SvelteKit

  • SvelteKit now supports TypeScript 6.0 (2.56.0, Docs, #15595)
  • form fields can now specify a default value using field.as(type, value), reducing boilerplate for pre-populated forms (2.56.0, Docs, #15577)
  • Remote function transport now uses hydratable, enabling richer data types in query results (2.56.0, #15533)
  • Form submit now returns a boolean to indicate submission validity for enhanced form remote functions (2.57.0, Docs, #15530)
  • Remote Function Breaking Changes (2.56.0)
    • Client-requested query refreshes must obtain permission from the server (#15562)
    • Stabilize remote function caching by sorting object keys (#15570)
    • Add run() method to queries, disallow awaiting queries outside render (#15533)
    • Isolate command-triggered query refresh failures per-query (#15562)
    • requested now requires limit and yields { arg, query } entries rather than validated args (#15739)

Looking for more details on the many bug fixes and performance optimizations from this month? Check out the SvelteKit / Adapter CHANGELOGs.

What's new in Svelte and Svelte Dev Tools

  • Community add-ons are now available in sv as an experimental feature (sv@0.1.0, Docs, #1020)
  • The sv and sv-utils packages are now separate in the CLI package - leading to a more explicit public API and a deprecation pass for old features (sv@0.2.0, Docs, #1046)
  • sv will now more reliably detect if Vitest v3 is installed when configuring projects (sv@0.15.2, #1073)
  • Types for TweenOptions, SpringOptions, SpringUpdateOptions and Updater are now available as exports from svelte/motion (svelte@5.55.0, Docs, #17967)

For a full list of changes - including all the important bugfixes that went into the releases this month - check out the Svelte compiler's CHANGELOG.

Community Showcase

Apps & Sites built with Svelte

  • 4Track is a faithful recreation of a 4-track tape recorder in the browser
  • Kumamap is a bear incident map that collates official reports, news and community reports in Japan
  • Overshoot is an interactive exploration of Disney's 12 Principles of Animation
  • DockScope is a visual Docker dashboard with a 3D dependency graph, live metrics, logs, terminal and container actions
  • dnsoptic is a DNS health audit tool that checks nameservers, mail authentication, DNSSEC, security posture and migration diffs
  • swap. is a collection of little games built around sorting algorithms
  • Scapedle is a Wordle game with Old School RuneScape (OSRS) words
  • Ephemeral Forms is a modern, zero-login, offline-first form builder with AI-powered generation, real-time collaboration and cross-device sync
  • CORDIAL is an AI Native IDE optimized for a big screen experience. "Good for people who want to feel like Tom Cruise in Minority Report"

Learning Resources

Featuring Svelte Contributors and Ambassadors

This Week in Svelte

  • Ep. 137 - Changelog, Community sv add-ons
  • Ep. 138 - Changelog
  • Ep. 139 - Changelog, Imperative interfaces

To Read

Libraries, Tools & Components

UI Components and Animations

  • Blossom Color Picker is a flower-style color picker
  • thisux/sveltednd (last featured in December 2024) has been updated to support Svelte 5
  • phantom-ui is a structure-aware skeleton loader built with web components
  • Svelte Spell UI is a port of the original Spell UI that you can copy-paste into any project
  • Svileo is a physics-based toast component inspired by Sileo
  • Motion Core (last featured in February) has been rewritten from Three.js to OGL with a much-reduced file size

State Management

  • Stately is a Pinia-inspired state management library that provides a structured way to define shared state, mutate it directly and observe changes

Utilities and Integrations

  • Sveltia I18n is an internationalization library powered by runes and the messageformat library for formatting messages using Unicode MessageFormat 2 (MF2)
  • Nabu is a modular, local-first Svelte block editor engine built on a Single ContentEditable architecture
  • Svelte Agentation turns UI annotations into structured context that AI coding agents can understand and act on

Developer Tools

  • Atom Forge is a full-stack TypeScript toolkit with Svelte 5 UI components, type-safe RPC and a battle-tested architecture pattern that scales
  • svelte-check-native is a Rust/tsgo drop-in replacement for svelte-check with the same flags, output formats and exit codes

That's it for this month! Let us know if we missed anything on Reddit or Discord.

Until next time 👋🏼!