# What's new in Svelte: May 2025

DevFeed: [What's new in Svelte: May 2025](<https://devfeed.tech/articles/what-s-new-in-svelte-may-2025-3108.md>)

Original publisher: [Read original article](<https://svelte.dev/blog/whats-new-in-svelte-may-2025>)

Author: Dani Sandoval

Published: 2025-05-01T00:00:00Z

Content type: news

Language: en

Sources: [Svelte blog](<https://devfeed.tech/sources/svelte-blog.md>)

Topics: [Svelte](<https://devfeed.tech/topics/svelte.md>), [changelog](<https://devfeed.tech/topics/changelog.md>), [Command-line interface](<https://devfeed.tech/topics/cli.md>), [observability](<https://devfeed.tech/topics/observability.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>), [bug](<https://devfeed.tech/topics/bug.md>), [Cloudflare](<https://devfeed.tech/topics/cloudflare.md>), [Vercel](<https://devfeed.tech/topics/vercel.md>)

Tags: [bug](<https://devfeed.tech/tags/bug.md>), [changelog](<https://devfeed.tech/tags/changelog.md>), [cli](<https://devfeed.tech/tags/cli.md>), [cloudflare](<https://devfeed.tech/tags/cloudflare.md>), [development](<https://devfeed.tech/tags/development.md>), [observability](<https://devfeed.tech/tags/observability.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [svelte](<https://devfeed.tech/tags/svelte.md>), [vercel](<https://devfeed.tech/tags/vercel.md>)

## AI overview

This May 2025 Svelte update covers work on Asynchronous Svelte, partially evaluated expressions for improved runtime performance, new Svelte CLI package-manager options, consolidated Cloudflare adapters, improved Vercel adapter observability, and SvelteKit fixes. It also highlights community projects and ecosystem updates.

## Source excerpt

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. Community ShowcaseApps & 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 respon