SvelteKit async SSR has landed! The future of Svelte is now here. Try it out along with the new remote functions! See the PR for some unfinished rough edges. Work continues on it while it's behind an experimental flag, but you can now play around with it! github.com/sveltejs/kit...

I made a submission to #Interop 2026 – the WebKit bug that results in a race condition with multiple top-level awaits in different modules: github.com/web-platform... We’ve talked about this one on here @rich-harris.dev and @jensimmons.bsky.social Let me know if I should add anything else?

I'm honestly hyped about how a still rudimentary Svelte MCP can improve the code of a model that ranked 47 on the bench enough that not only works, but it's actually decent code. Here's a visualization of all the steps with the suggestions from the MCP...very fascinating! Links in the next post! 🧡

svelte-check is now much faster for all Svelte users!!! 33% faster in this real world test case!!! Thanks @43081j.com for all your efforts to speed up Svelte as part of improving the JS ecosystem via @e18e.dev!

npm needs to enable bulk actions to keep us safe so that maintainers don't give up after hitting stuff like this

Svelte MCP server incoming!

A survey has been started in response to my browser interop submission to gauge interest in streaming of the fetch request body. If you would use it, if it were present in Firefox, this is your chance to express that! survey.alchemer.com/s3/8460326/F...

I just submitted a formal request for ReadableStream in fetch body as part of interop 2026 to make progress tracking of fetch requests work across browsers github.com/web-platform...

Went to test SvelteKit's new remote functions, damn it almost pulled me out of web dev burnout 🔥 It is something else!

Want to know what a better library for a piece of functionality is? Check out the e18e replacements directory which lists alternatives to bloated legacy npm packages

Bluesky posts about Svelte now appear in a #bluesky channel in the Svelte Discord to bring additional visibility to the discussions here. Thanks to @paolo.ricciuti.me for making this a reality! Lots of great discussions about new features such as await expressions, remote funcs, and open telemetry.

Should Svelte/Kit's new Remote Functions integrate form validation? There is a new proposal for it here: github.com/sveltejs/kit...

Who here is using Laravel + Svelte? Getting an increasing number of messages about Svelte stuff, trying to get a sense

OpenTelemetry tracing is live in SvelteKit! Huge s/o to @stracke.tech for all the help along the way. SvelteKit can now emit OTEL spans for all of its serverside constructs. It also provides an instrumentation file to easily set up trace exports. svelte.dev/blog/sveltek...

SvelteKit 3 will drop 17% of dependencies thanks to new APIs now available directly in Node. We could drop another 17% if Node were to add support for cookie parsing and serialization.

Good news from ESLint! The 10 years old parallel linting issue is finally resolved. Issue: github.com/eslint/eslin... PR: github.com/eslint/eslin...

My ahead-of-time JS engine Porffor eliminates JS cold starts on AWS Lambda. 12x faster and 2x cheaper than managed Node. Still very early but these results should speak for themselves :) goose.icu/lambda/

📈 Here are the SvelteBench results for gpt-5. Overall it places in 12th spot. However, it's a huge improvement over the other GPT models (last image), and seems like a decent choice for Svelte 5. Mini and Nano do not inherit the good scores. 😿 khromov.se/svelte-bench #svelte

Do I know anyone at GitHub? 👀 Our e18e sponsors account has been stuck pending for a few months now I think I know why but struggling to find a human to ask about it 😂

SvelteKit remote functions are now available under an experimental flag. Docs here: svelte.dev/docs/kit/rem...

URL references in SvelteKit are now type-checked to ensure the URL exists. Goodbye 404s! github.com/sveltejs/kit...

just some of the highlights of the great work the @e18e.dev community has been doing in the last few months. awesome work by everyone involved, and big thanks to all the maintainers who collaborated ❤️

It looks like Vite is getting a new devtools 👀 github.com/vitejs/devto...

Svelte remote functions PR is out and here are the changes. 🔥 I removed things so they fit in a post but I'm going to link to the updates and the PR. 👇

I just came across a great site that lets the public crowdfund testing of their foods to check whether they contain hormone disruptors: laboratory.love GitHub's founder did this and posted his results on plasticlist.org and it was really surprising how many products were found to contain phthalates

Ark UI now supports Svelte and it looks really awesome! ark-ui.com/blog/introdu...

The Remote Functions RFC from Svelte maintainers is really good. Not only do you get built-in optimistic updates, but also correct rollback to the correct state on both errors *and* random network latency out of the box! #svelte #javascript #sveltekit

SvelteKit now supports Rolldown for faster builds via Rust! See the changelog for more details: github.com/sveltejs/kit... Thanks to Tee Ming and @dominikg.dev for implementing and the @rolldown.rs team for a tremendous amount of support in making this work!

hard to overstate how excited i am about this RFC — @dummdidumm.bsky.social is doing incredible work. this raises the bar for data fetching in frameworks, and unlocks some very cool new use cases for SvelteKit. we have a lot more ideas that will build on top of this work github.com/sveltejs/kit...

Awesome LLM benchmark by @khromov.se to test which model writes Svelte 5 code the best!

✨ The results are in - Opus 4 and Sonnet 4 are very capable of writing Svelte 5 code out of the box, without excessive prompting or llms.txt files! All results here: khromov.github.io/svelte-bench... Bonus: A TODO app written with Svelte 5 / Opus 4 in one shot: svelte.dev/playground/e...

Claude 4 joins Gemini 2.5 in having a knowledge cutoff recent enough to write Svelte 5 code!

Node.js—I just learned that there is: npm init --init-type=module --yes But it doesn’t help much. I’ll probably continue to use `npm init` without that flag and change "commonjs" to "module" manually. It feels like npm could switch to "module" as the default now.

Very nuanced and insightful read about a React->Svelte migration story! Includes: - benefits of Svelte - how to approach the migration - how to render Svelte components in React and vice versa

I made a video explaining the new Svelte `@​attach` feature which is the `onMount` for elements and how it improves on Svelte actions using GSAP as an example. 🔥 youtu.be/9PREEREiPAE

Attachments are now out as part of Svelte 5.29! They're a better version of the `use:` actions that Svelte has historically used and let you "attach" actions like: <button {@attach tooltip('Hello')}>Hover me</button>

If anyone is interested in building truely native apps with #svelte and #lynxjs, please reach out! We have a working prototype but need funding to make that production ready and usable for the wider ecosystem 🤗

We just released a huge improvement to SPA support in SvelteKit 2.21.0. You can now write client-only load functions without it triggering a crash during the build process. Thanks to @bholmes.dev for reminding us of this issue and spurring us to work on it and Tee Ming for implementing it!

today the svelte CLI merged this. big chunk of work, moving back onto clack main and dropping their fork. this involved a whole bunch of feature work in clack, big thanks to the @svelte.dev and @bomb.sh teams

Added 30 New Components in Shadcn Svelte Blocks New - CLI Support for installing components using jsrepo.dev Checkout : sv-blocks.vercel.app

✨ How good are AIs at writing Svelte 5 code? I decided to test the newest models and find out. More info soon, but the tldr is: Gemini 2.5 Pro is best, all OpenAI models do poorly. Base results: khromov.se/svelte-bench With llms-small.txt: khromov.se/svelte-bench... #svelte

Happy *Publish All NPM Packages as Standard JS Modules Only Day* to all who celebrate! 🎉 All supported versions of Node now support require() of standard JS modules, aka require(esm). So add type: "module" to your package.json, simplify your build, and spark some joy! nodejs.org/en/about/pre...

So, some of you may know that recently I'm working full time on the svelte renderer API thanks to the company I work for ( @mainmatter.com ). This will unlock using Lynx to build native applications with svelte. There's still a lot of work to do but isn't a counter the mother of all apps? 🧡😍

Massive shout out to @e18e.dev for all the help slimming down Storybook. They are doing so many great things for the ecosystem!!! 💐

Svelte Summit is happening in two weeks and if you can't join us in Barcelona you can now get tickets for the live stream! The price is $40 + VAT. For more details visit our updated website. www.sveltesummit.com

A prerelease of Changesets v3 is out! Some code and dependency cleanups so far, with more minor breaking changes soon, but should be simple to upgrade. Thanks to @andarist.bsky.social for helping to make this happen. github.com/changesets/c...

Out of all the frameworks I’ve tried to convert to my favorite contacts app tutorial (RedwoodSDK, Waku, React Router 7, SvelteKit, SolidStart, Nuxt, Angular), React Router 7 and SvelteKit have been by far and away the easiest and best UX implementations.

Tanstack svelte-form is available now!

Svelte 5 usage just passed Svelte 4 usage! If you haven't migrated yet, there's a great migration tool available via the CLI, playground, and VS Code! We've also been steadily improving the docs and smoothing out any rough edges we notice people hitting to help people adopt the new version.

`<BarChart radial>` coming along nicely