iiinova — where your digital self keeps evolving

Svelte @svelte.dev · 27/08/2026

Last few days for early bird pricing for Svelte Summit! If you're quick you can snag another 10% off 👇

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Svelte @svelte.dev · 20/08/2026

come and celebrate our 10th birthday in ljubljana! we will make sure there's cake

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Svelte Society @sveltesociety.dev · 11/08/2026

Only a couple of days left to submit a talk for Svelte Summit. Don't miss your chance! sveltesummit.com/cfp

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Svelte Society @sveltesociety.dev · 08/08/2026

Can't wait for Svelte Summit? Virtual Tickets are now LIVE. THIS IS NOT A DRILL! sveltesummit.com/virtual

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rich harris @rich-harris.dev · 01/06/2026

SvelteKit arguably has a more sophisticated and flexible system for handling env vars than any other framework. We think we can do better though. Here's what we're working on: github.com/sveltejs/kit... Give it a read and let us know if you have feedback

github.com

feat: explicit environment variables by Rich-Harris · Pull Request #15934 · sveltejs/kit

Today, environment variables are implicitly available: anything in process.env can be imported directly (as long as the name is a valid identifier) from $env/static/private, or accessed via env imp...

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Svelte @svelte.dev · 14/05/2026

We've just published patch releases of devalue, Svelte, and SvelteKit that fix a number of vulnerabilities. No need to panic — they're all hard to exploit or reliant on experimental features — but we recommend updating as soon as you get a chance. More details in the advisories:

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Elliott Johnson @ell.iott.dev · 18/02/2026

We just released a number of security patches across the Svelte ecosystem. If you use SvelteKit, the Vercel adapter for SvelteKit, Svelte, or devalue, you should upgrade. The Vercel OSS Bug Bounty paid out over $14,000 for these reports!

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Svelte @svelte.dev · 15/01/2026

We've released fixes for 5 CVEs affecting the Svelte ecosystem. Please upgrade your apps! Read the post to learn if you're affected: svelte.dev/blog/cves-af...

svelte.dev

CVEs affecting the Svelte ecosystem

Time to upgrade

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Svelte @svelte.dev · 01/12/2025

🎅🎄🎁 ADVENT OF SVELTE 2025 🎅🎄🎁 24 days, 24 videos with tips, tricks and features you didn't know about we're hitting the ground running with the lesser-known $inspect(...) and $inspect.trace(...) runes (docs: svelte.dev/docs/svelte/...) follow along here! advent.sveltesociety.dev/2025

youtube.com

Advent of Svelte 2025 - Day 1: $inspect.trace(...)

YouTube video by Svelte Society

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rich harris @rich-harris.dev · 25/10/2025

today we landed a @svelte.dev feature i'm pretty stoked about — we call it 'forking', and it lets you run state changes offscreen and later choose whether to commit them (e.g. user hovers on a link, preload data in case they click) - docs svelte.dev/docs/svelte/... - demo svelte.dev/playground/a...

svelte.dev

forking monkeys • Playground • Svelte

Web development for the rest of us

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Svelte @svelte.dev · 04/10/2025

lil' treat for all you weekend builders: Svelte now has an official MCP server, courtesy of resident bot wranglers @paolo.ricciuti.me and @khromov.se 🤖 it gives your LLM access to docs and compiler-driven diagnostics — give it a spin and let us know how you get on! svelte.dev/docs/mcp/ove...

svelte.dev

Overview • Docs • Svelte

Overview • Svelte documentation

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Andy Rose @andyrose12.bsky.social · 03/10/2025

Support Svelte development!

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Svelte @svelte.dev · 24/09/2025

You can now use Svelte's async features in your Astro islands! Just update to the latest versions, opt in to the `experimental.async` flag, and you're off to the races svelte.dev/docs/svelte/...

svelte.dev

await • Docs • Svelte

await • Svelte documentation

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Scott Spence @scottspence.dev · 18/09/2025

@svelte.london is being hosted by Triver this evening! Check out the stream if you’re interested in low latency Svelte and using Svelte with Cloudflare www.youtube.com/live/odCWAAa...

youtube.com

Svelte London - September 2025

YouTube video by Svelte Society

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Svelte @svelte.dev · 08/09/2025

You've probably heard about the supply chain attack that affected a number of widely-used npm packages today. tl;dr: Don't panic. Notes: 1. Svelte, SvelteKit and their associated packages are not vulnerable to this attack, as they do not use any of the compromised dependencies in the browser

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Elliott Johnson @ell.iott.dev · 18/08/2025

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...

svelte.dev

Introducing integrated observability in SvelteKit

SvelteKit apps can now emit OpenTelemetry traces and reliably set up observability instrumentation using instrumentation.server.ts

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Svelte @svelte.dev · 31/07/2025

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

svelte.dev

Remote functions • Docs • Svelte

Remote functions • Svelte documentation

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rich harris @rich-harris.dev · 24/07/2025

long overdue but we made the SvelteKit router more type-safe. docs for `resolve(...)` and `asset(...)` at svelte.dev/docs/kit/$ap...

examples of type errors now surfaced by SvelteKit when you mess routes up

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Svelte @svelte.dev · 24/07/2025

now available for your on-demand viewing pleasure

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Svelte Society @sveltesociety.dev · 21/05/2025

For those of you who have been wondering if and when the videos of Svelte Summit 2025 Barcelona will be freely available, we just published a blog post about it: svelte.dev/blog/svelte-...

svelte.dev

Bringing Svelte Summit to the whole community

We’re sponsoring the release of talks from Barcelona, starting this weekend

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Svelte @svelte.dev · 14/04/2025

We just published an advisory for CVE-2025-32388, a moderate severity XSS vulnerability in SvelteKit. Please update to `@sveltejs/kit@2.20.6`. The vulnerability affects applications that iterate over all search parameters inside a server `load` function. More details in the advisory 👇

github.com

XSS via tracked search_params

### Summary Unsanitized search param names cause XSS vulnerability. You are affected if you iterate over all entries of `event.url.searchParams` inside a server `load` function. Attackers can ex...

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Svelte @svelte.dev · 09/04/2025

you can now use .ts files in the playground: svelte.dev/playground/7... caveat: only supports erasable syntax (www.typescriptlang.org/docs/handboo...). under the hood this uses bloomberg.github.io/ts-blank-spa... (note that typechecking/intellisense are TODO)

svelte.dev

TypeScript! • Playground • Svelte

Web development for the rest of us

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Svelte @svelte.dev · 31/03/2025

If you're using SvelteKit (or Svelte+Vite without SvelteKit) then we recommend updating your Vite version. Note that the vulnerability only exists if you're doing `vite dev --host` (or `server.host: true`) on an untrusted network, which you're probably not. But update anyway

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rich harris @rich-harris.dev · 21/03/2025

As of @svelte.dev 5.25 you can temporarily override a derived value, which is very handy for optimistic UI • demo svelte.dev/playground/3... • docs svelte.dev/docs/svelte/...

A screenshot of https://svelte.dev/playground/3de3a4446cd14bad884ea05fbd35363a?version=5.25.0 showing the new 'writable derived' feature

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Svelte @svelte.dev · 21/03/2025

last chance to grab tickets at the lower price!

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rich harris @rich-harris.dev · 07/03/2025

PSA for @svelte.dev users: we're planning to change how effect teardowns work to eliminate a common gotcha that affects signal-based frameworks. If the new behaviour would create problems for you, please let us know! github.com/sveltejs/sve...

github.com

fix: on teardown, use the last known value for the signal before the set by trueadm · Pull Request #15469 · sveltejs/svelte

PSA: we are changing how effect teardowns work! Today, if you read some state inside a teardown function, you get the latest state: $effect(() => { const prev = value; return () => { ...

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Svelte Society @sveltesociety.dev · 14/02/2025

Now that speakers have been selected we want to share with you our line-up for Svelte Summit Spring 2025! We will host 16 talks across different topics during the two day conference. In addition, @mainmatter.com will also host a workshop. More details on www.sveltesummit.com

sveltesummit.com

Svelte Summit Spring 2025: Barcelona & online

The next in-person Svelte Summit will happen on May 8 and 9 in Barcelona, Spain! Get your tickets and submit your proposals now!

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Simon H @dummdidumm.bsky.social · 12/02/2025

New in Svelte: A way to create a unique ID that is stable across client and server svelte.dev/docs/svelte/...

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Svelte @svelte.dev · 12/02/2025

in case you missed it: the SvelteHack winners are up! many thanks to everyone who took part, and kudos to these outstanding projects in particular 👇

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Svelte Society @sveltesociety.dev · 28/01/2025

We've just sent out emails to everyone who submitted a proposal! Please read it carefully. See you at Svelte Summit Spring 2025!

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Svelte Society @sveltesociety.dev · 19/12/2024

Reminder: There are less than two weeks left to get a 20% discount on tickets for the next in-person Svelte Summit. Use the code sveltmas2024 at checkout or email us for group tickets. More details on the website. www.sveltesummit.com

sveltesummit.com

Svelte Summit Spring 2025: Barcelona & online

The next in-person Svelte Summit will happen on May 8 and 9 in Barcelona, Spain! Get your tickets and submit your proposals now!

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Svelte @svelte.dev · 13/12/2024

🚨 THIS IS NOT A DRILL 🚨 in-person Svelte Summit happening in May! get your (discounted) tickets and come hang out!

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Svelte @svelte.dev · 06/12/2024

Aside from Advent of Svelte, we've also been shipping a bunch of minor bugfixes and improvements. For example, `if` blocks are now treeshakeable — if you have a condition that can be known statically, like `{#if BROWSER}`, then dead code will be eliminated by a minifier

A screenshot of svelte.dev/playground showing the generated code for a component with a static if condition

The result of running the output of the Svelte compiler through treeshaking, using rollupjs.org/repl

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Svelte @svelte.dev · 01/12/2024

🎅🎄🎁 ADVENT OF SVELTE 🎅🎄🎁 We're going to ship one thing a day every day from now until Christmas. Wish us luck! svelte.dev/blog/advent-... First up...

svelte.dev

Advent of Svelte

Twenty-four days, twenty-four features

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