What’s new in Svelte: May 2025

Only a week until Svelte Summit Spring 2025! If you can’t make it in-person to Barcelona, you can purchase a virtual ticket here.

But before that, we’ve got a few updates to highlight...

What’s new in Svelte and SvelteKit

The Svelte maintainers have been hard at work building out Asynchronous Svelte this month, but still found the time to ship some helpful features. If you’re interested in trying out the async branch, or just want to follow along with the development, check out feat: allow await in components #15844

• Certain expressions will now be partially evaluated to improve runtime performance (svelte@5.27.0/5.28.0, #15494/#15781)
• The Svelte CLI (sv) has added a --install <package-manager> flag to create and add to specify which package manager to use when running (cli@0.8.1, #531)
• The two separate CloudFlare adapters have been merged into one: adapter-cloudflare (adapter-cloudflare@7.0.0, #13634)
• adapter-vercel will now create symlink functions for each route, for better observability (adapter-vercel@5.7.0, #13679)

There were a number of fixes in SvelteKit too - including an improvement to the HandleServerError hook to give it access to getRequestEvent! (#13666)

For a full list of bug fixes in Svelte, SvelteKit and its adapters, check out their CHANGELOGs here and here. Interested in all the new fixes in language tools? You can find them here.

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Community Showcase

Apps & Sites built with Svelte

• TableSlayer is an open source software for managing in person RPG games with digital displays (check out the video demo on Reddit)
• Iconia is a free tool that understands natural language and responds with relevant icons from famous icon libraries
• CMSDocs transforms your Google Docs into Blog CMS
• Svelte Changelog v2 is out now and is a reimagined way of staying up to date on all the new changes in the Svelte ecosystem
• Hookah UI is a visual configuration builder for the Hookah project
• mockiapi is a mock API server that allows you to define endpoints, return custom JSON responses, and simulate real-world API behavior
• soarSQL is an SQL editor made for analytical processing on Postgres, MySQL, and CSVs - powered by duckDB
• Persona Simulator helps you practice your communication skills by chatting with different personas
• Typo is a web-based markdown editor with formatting in codeblocks and typescript execution
• FernOS is a lightweight operating system running inside your browser

Learning Resources

Featuring Svelte Contributors and Ambassadors

• ">SvelteKit is the best way to build single page apps - and it just got even better! by Stanislav Khromov (Video)
• ">Svelte London - April 2025
  • Building cross-platform browser extensions with Svelte by Oliver Turner (10:52)
  • Kioko: Coding CAD by Armel de Montgros and Soloman Azizi (43:00)

This Week in Svelte

• ">Ep. 100 — Q&A with Rich Harris
• ">Ep. 101 — Changelog

To Read

• Graphite - an open source 2D procedural graphics editor built with Svelte - has released a product update blog post
• Cloudflare Workers & SvelteKit: BetterAuth, Custom Domain, Google OAuth, OTP & Email - Securing Your Application by Jilles Soeters
• Building a Real-time Dashboard with Flask and Svelte by Amir Tadrisi
• Copying Nuxt’s useState in Qwik and Svelte by Jonathan Gamble

Libraries, Tools & Components

• diaper is an advanced bottom sheet component for Svelte 5
• mcp-svelte-docs is an MCP server that lets you search and access Svelte documentation with built-in caching
• Version 4 of Anime.js - a popular JS animation library - has been released
• DeepWiki has created a comprehensive introduction to the Svelte framework repository
• Vite Static Assets Plugin is a Vite plugin that automatically scans your static assets directory, generates a type-safe TypeScript module with all asset paths to help during build or development time
• Mode Watcher v1 provides simple light/dark mode management, now rewritten with first-class Svelte 5 support

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

Until next time 👋🏼!

https://svelte.dev/blog/whats-new-in-svelte-may-2025