Janis Jansen 🌳
@janis.me
Building @elevenlabs.io and open source CSS tools. Previously fluid simulations @dive.
TS + CSS = surimi.dev
🔗 janis.me
🖥️ github.com/janis-me
📽️ youtube.com/@janis-me
TS + CSS = surimi.dev
🔗 janis.me
🖥️ github.com/janis-me
📽️ youtube.com/@janis-me
Pinned
Janis Jansen 🌳
@janis.me
· Oct 15
The first version of the 🍣 surimi playground is live!
It runs the @rolldown.rs based compiler in a WebContainer, and updates the editor instantly!
Check it out! surimi.dev/playground
Compile times are bit slower than locally tho.
Also
- has type-hint support
- you can install new packages
- ...
It runs the @rolldown.rs based compiler in a WebContainer, and updates the editor instantly!
Check it out! surimi.dev/playground
Compile times are bit slower than locally tho.
Also
- has type-hint support
- you can install new packages
- ...
This is super cool. I'm neighbors with @jquery.bsky.social and @wasm.io. can't get more precise than that.
I made a map of 3.4 million Bluesky users - see if you can find yourself!
bluesky-map.theo.io
I've seen some similar projects, but IMO this seems to better capture some of the fine-grained detail
bluesky-map.theo.io
I've seen some similar projects, but IMO this seems to better capture some of the fine-grained detail
Bluesky Map
Interactive map of 3.4 million Bluesky users, visualised by their follower pattern.
bluesky-map.theo.io
February 9, 2026 at 7:42 PM
This is super cool. I'm neighbors with @jquery.bsky.social and @wasm.io. can't get more precise than that.
Also in there: @hiogawa.bsky.social, @joshuakgoldberg.com and @daishikato.com along with the ones I mentioned before.
Thank you all for your work, it truly has a huge impact!
Thank you all for your work, it truly has a huge impact!
Grateful for being part of the first round of the OSS Engineering Fund by @elevenlabs.io 💖
Thank you for sponsoring me 🙏
Thank you for sponsoring me 🙏
ElevenLabs Engineers OSS Fund for open-source projects
We are launching the ElevenLabs Engineers OSS Fund to provide recurring support for the open-source projects that power our audio and AI systems.
elevenlabs.io
February 9, 2026 at 3:09 PM
Also in there: @hiogawa.bsky.social, @joshuakgoldberg.com and @daishikato.com along with the ones I mentioned before.
Thank you all for your work, it truly has a huge impact!
Thank you all for your work, it truly has a huge impact!
Reposted by Janis Jansen 🌳
Grateful for being part of the first round of the OSS Engineering Fund by @elevenlabs.io 💖
Thank you for sponsoring me 🙏
Thank you for sponsoring me 🙏
ElevenLabs Engineers OSS Fund for open-source projects
We are launching the ElevenLabs Engineers OSS Fund to provide recurring support for the open-source projects that power our audio and AI systems.
elevenlabs.io
February 9, 2026 at 3:05 PM
Grateful for being part of the first round of the OSS Engineering Fund by @elevenlabs.io 💖
Thank you for sponsoring me 🙏
Thank you for sponsoring me 🙏
I just sponsored @patak.dev for his work on npmx (and all the other stuff). I love this project and think it deserves backing. Hoping some day I find time to contribute.
Sponsor your open source maintainers!!
github.com/sponsors/pat...
Sponsor your open source maintainers!!
github.com/sponsors/pat...
Sponsor @patak-dev on GitHub Sponsors
Hey! I'm one of the Project Stewards of [npmx](https://npmx.dev). We're building a modern browser for the npm registry, by fostering an ever growing community of developers and trying to set an exa...
github.com
February 4, 2026 at 8:49 AM
I just sponsored @patak.dev for his work on npmx (and all the other stuff). I love this project and think it deserves backing. Hoping some day I find time to contribute.
Sponsor your open source maintainers!!
github.com/sponsors/pat...
Sponsor your open source maintainers!!
github.com/sponsors/pat...
first to like postcss by @evilmartians.com on @npmx.dev
February 4, 2026 at 8:33 AM
first to like postcss by @evilmartians.com on @npmx.dev
Wait since when can you spread `false` in javascript?
{ ...false } is valid! That means to spread properties into an object if they are defined you can just do
{ ...user, ...(name !== undefined && { name }) }
instead of
{ ...user, ...(name !== undefined ? { name } : {}) }
{ ...false } is valid! That means to spread properties into an object if they are defined you can just do
{ ...user, ...(name !== undefined && { name }) }
instead of
{ ...user, ...(name !== undefined ? { name } : {}) }
January 30, 2026 at 8:44 AM
Wait since when can you spread `false` in javascript?
{ ...false } is valid! That means to spread properties into an object if they are defined you can just do
{ ...user, ...(name !== undefined && { name }) }
instead of
{ ...user, ...(name !== undefined ? { name } : {}) }
{ ...false } is valid! That means to spread properties into an object if they are defined you can just do
{ ...user, ...(name !== undefined && { name }) }
instead of
{ ...user, ...(name !== undefined ? { name } : {}) }
TIL the "Shadow Wolves" exist. A unit within the US ICE Homeland security described on the official website as a "Native American tactical patrol unit" that "hunts, like a wolf pack".
To an EU citizen this reads like the plot for a cheap 1990 movie (racism built in)
www.ice.gov/about-ice/hs...
To an EU citizen this reads like the plot for a cheap 1990 movie (racism built in)
www.ice.gov/about-ice/hs...
Shadow Wolves
www.ice.gov
January 30, 2026 at 6:22 AM
TIL the "Shadow Wolves" exist. A unit within the US ICE Homeland security described on the official website as a "Native American tactical patrol unit" that "hunts, like a wolf pack".
To an EU citizen this reads like the plot for a cheap 1990 movie (racism built in)
www.ice.gov/about-ice/hs...
To an EU citizen this reads like the plot for a cheap 1990 movie (racism built in)
www.ice.gov/about-ice/hs...
Told an LLM to make me a script that involves scraping youtube links for metadata. It gave some example YouTube links.
You know what video was in there... I got rick-rolled by an LLM.
You know what video was in there... I got rick-rolled by an LLM.
January 28, 2026 at 8:55 AM
Told an LLM to make me a script that involves scraping youtube links for metadata. It gave some example YouTube links.
You know what video was in there... I got rick-rolled by an LLM.
You know what video was in there... I got rick-rolled by an LLM.
The latest episode of "Off the main thread" turned 1 last week. There is so much to talk about. Make it happen, please!
January 20, 2026 at 8:29 PM
The latest episode of "Off the main thread" turned 1 last week. There is so much to talk about. Make it happen, please!
Reposted by Janis Jansen 🌳
just a reminder that i have github sponsors if you'd like to sponsor the OSS work i do.
i maintain quite a few projects, and contribute to many more. nobody other than these sponsors pay for that. so these help a huge amount, however small 🙏
thanks so much to those who already did ❤️
i maintain quite a few projects, and contribute to many more. nobody other than these sponsors pay for that. so these help a huge amount, however small 🙏
thanks so much to those who already did ❤️
Sponsor @43081j on GitHub Sponsors
Maintainer of chai, parse5, unjs, vueuse, tinylibs, & more. One of the e18e.dev leads. Core contributor to lit and modernweb.
github.com
January 11, 2026 at 9:51 PM
just a reminder that i have github sponsors if you'd like to sponsor the OSS work i do.
i maintain quite a few projects, and contribute to many more. nobody other than these sponsors pay for that. so these help a huge amount, however small 🙏
thanks so much to those who already did ❤️
i maintain quite a few projects, and contribute to many more. nobody other than these sponsors pay for that. so these help a huge amount, however small 🙏
thanks so much to those who already did ❤️
1. I'm going to @beyondtellerrand.com 2026!🎉 I've wanted to go literally for years and I can finally make it!
2. Found out the Beyond Tellerand organization is registered in my hometown, 10 mins from where I was born. The world is small.
2. Found out the Beyond Tellerand organization is registered in my hometown, 10 mins from where I was born. The world is small.
January 9, 2026 at 11:24 AM
1. I'm going to @beyondtellerrand.com 2026!🎉 I've wanted to go literally for years and I can finally make it!
2. Found out the Beyond Tellerand organization is registered in my hometown, 10 mins from where I was born. The world is small.
2. Found out the Beyond Tellerand organization is registered in my hometown, 10 mins from where I was born. The world is small.
A great introduction into SIMD for rust developers (and about recent hardware changes and standards)
kerkour.com/introduction...
kerkour.com/introduction...
Introduction to SIMD programming in pure Rust
I've recently tasted AMD Zen 5 CPUs (AWS' m8a instances) and... Whooaaa. Even before talking about GPUs and NPUs, the next 5 years of CPUs will be very exciting! For
kerkour.com
January 8, 2026 at 5:28 AM
A great introduction into SIMD for rust developers (and about recent hardware changes and standards)
kerkour.com/introduction...
kerkour.com/introduction...
Today at 19:00 CET, a friend will give a talk at the CCC about building a RISC-V CPU... In the video game factorio. If you're into that stuff:
fahrplan.events.ccc.de/congress/202...
fahrplan.events.ccc.de/congress/202...
[39c3] CPU Entwicklung in Factorio: Vom D-Flip-Flop bis zum eigenen Betriebssystem
Factorio ist ein Spiel über Fabrikautomation - Förderbänder, Dampfmaschinen und Produktionsketten stehen im Vordergrund. Eigentlich ist das interne Logiksystem („Combinators“) gedacht für die Steuerun...
fahrplan.events.ccc.de
December 28, 2025 at 7:54 AM
Today at 19:00 CET, a friend will give a talk at the CCC about building a RISC-V CPU... In the video game factorio. If you're into that stuff:
fahrplan.events.ccc.de/congress/202...
fahrplan.events.ccc.de/congress/202...
We nominated some open source maintainers and tools to receive funding from the OSS Engineers Fund and will donate $22k to the projects we rely on at ElevenLabs! Some of these are my favorite tools I use daily that I think really deserve support like PostCSS, Graphite, ProseMirror and more.
December 15, 2025 at 7:36 PM
We nominated some open source maintainers and tools to receive funding from the OSS Engineers Fund and will donate $22k to the projects we rely on at ElevenLabs! Some of these are my favorite tools I use daily that I think really deserve support like PostCSS, Graphite, ProseMirror and more.
Reposted by Janis Jansen 🌳
To recap, NPM allows 2FA TOTP token reuse within the token’s validity window.
I reported this and was told it’s a “known low-risk issue” and that they “don’t consider this to present a significant security risk.”
So, let’s look at how this seemingly small issue could be leveraged by a phisher. 1/
I reported this and was told it’s a “known low-risk issue” and that they “don’t consider this to present a significant security risk.”
So, let’s look at how this seemingly small issue could be leveraged by a phisher. 1/
Seems that NPM too allows TOTP reuse within the time-step window. Seen a similar issue in multiple services over the years.
Per RFC 6238, a TOTP (Time-based One-Time Password) should be single-use. Allowing reuse, even within the short-ish time window, is not ideal (shoulder surfing, phishing etc.)
Per RFC 6238, a TOTP (Time-based One-Time Password) should be single-use. Allowing reuse, even within the short-ish time window, is not ideal (shoulder surfing, phishing etc.)
December 12, 2025 at 1:08 PM
To recap, NPM allows 2FA TOTP token reuse within the token’s validity window.
I reported this and was told it’s a “known low-risk issue” and that they “don’t consider this to present a significant security risk.”
So, let’s look at how this seemingly small issue could be leveraged by a phisher. 1/
I reported this and was told it’s a “known low-risk issue” and that they “don’t consider this to present a significant security risk.”
So, let’s look at how this seemingly small issue could be leveraged by a phisher. 1/
Beware, a linkedin-type post...
I'm super excited to share that I've joined ElevenLabs to work on the creative platform and music as a full-stack dev!
Music and next-gen software have been a passion for literally my entire adult life. Now I can combine them in the best way!
I'm super excited to share that I've joined ElevenLabs to work on the creative platform and music as a full-stack dev!
Music and next-gen software have been a passion for literally my entire adult life. Now I can combine them in the best way!
December 2, 2025 at 8:29 PM
Beware, a linkedin-type post...
I'm super excited to share that I've joined ElevenLabs to work on the creative platform and music as a full-stack dev!
Music and next-gen software have been a passion for literally my entire adult life. Now I can combine them in the best way!
I'm super excited to share that I've joined ElevenLabs to work on the creative platform and music as a full-stack dev!
Music and next-gen software have been a passion for literally my entire adult life. Now I can combine them in the best way!
Hell yes. Tom Lehrer on WMBR radio rn. Collage radio is the best.
November 27, 2025 at 9:58 AM
Hell yes. Tom Lehrer on WMBR radio rn. Collage radio is the best.
Unified Linux and Mac nix config ✅
Got rid of NixGL ✅
Will stop changing my config now that it works ❌
Got rid of NixGL ✅
Will stop changing my config now that it works ❌
November 25, 2025 at 6:01 AM
Unified Linux and Mac nix config ✅
Got rid of NixGL ✅
Will stop changing my config now that it works ❌
Got rid of NixGL ✅
Will stop changing my config now that it works ❌
The component library I want is SUPER opinionated but also mostly unstyled.
I want it to force me to do things right, like force tooltips on some components but BAN them on others.
I want it to force me to use its built-in data-attributes for styling, but also allow me to use any styling tools.
I want it to force me to do things right, like force tooltips on some components but BAN them on others.
I want it to force me to use its built-in data-attributes for styling, but also allow me to use any styling tools.
November 23, 2025 at 8:51 PM
The component library I want is SUPER opinionated but also mostly unstyled.
I want it to force me to do things right, like force tooltips on some components but BAN them on others.
I want it to force me to use its built-in data-attributes for styling, but also allow me to use any styling tools.
I want it to force me to do things right, like force tooltips on some components but BAN them on others.
I want it to force me to use its built-in data-attributes for styling, but also allow me to use any styling tools.
@uni-muenster.de I just got a spam email claiming to be PayPal (with a copycat PayPal design) from your email fstolp@uni-muenster.de.
Either you were hacked or you have a very nasty student.
Either you were hacked or you have a very nasty student.
November 23, 2025 at 8:57 AM
@uni-muenster.de I just got a spam email claiming to be PayPal (with a copycat PayPal design) from your email fstolp@uni-muenster.de.
Either you were hacked or you have a very nasty student.
Either you were hacked or you have a very nasty student.
Are y'all using node 'subpath imports' yet? I've been using them for a couple of months and apart for some minor inconveniences they are working super well! I never thought about going back to typescript path aliases.
If you're not, maybe you should!
If you're not, maybe you should!
November 13, 2025 at 9:52 AM
Are y'all using node 'subpath imports' yet? I've been using them for a couple of months and apart for some minor inconveniences they are working super well! I never thought about going back to typescript path aliases.
If you're not, maybe you should!
If you're not, maybe you should!
Dying wish is the best hardcore band. You'll not change my mind.
November 6, 2025 at 10:24 AM
Dying wish is the best hardcore band. You'll not change my mind.
You can't stop me from playing Metroid Fusion on a GBA emulator on my modded Wii.
I do own a computer and I do own several other consoles. But this is the way you are supposed to play GBA games.
I do own a computer and I do own several other consoles. But this is the way you are supposed to play GBA games.
November 4, 2025 at 4:14 PM
You can't stop me from playing Metroid Fusion on a GBA emulator on my modded Wii.
I do own a computer and I do own several other consoles. But this is the way you are supposed to play GBA games.
I do own a computer and I do own several other consoles. But this is the way you are supposed to play GBA games.
In Firefox, if you could filter network requests based on path/file.. you could negate the filter and exclude all requests from the vite dev server.
I think that's something we need. Vite module requests always spam the network panel.
I think that's something we need. Vite module requests always spam the network panel.
October 28, 2025 at 6:32 AM
In Firefox, if you could filter network requests based on path/file.. you could negate the filter and exclude all requests from the vite dev server.
I think that's something we need. Vite module requests always spam the network panel.
I think that's something we need. Vite module requests always spam the network panel.
We're getting there! Was a very productive week.
October 23, 2025 at 8:14 PM
We're getting there! Was a very productive week.