Theo-Steiner
@theosteiner.de
🍣 Sushi is life
🗼 Software Engineer at LINE in Tokyo
🤖 @svelte.dev ambassador
⌨️ neovim aficionado
🦋 bsky user #46331
🗼 Software Engineer at LINE in Tokyo
🤖 @svelte.dev ambassador
⌨️ neovim aficionado
🦋 bsky user #46331
Pinned
Theo-Steiner
@theosteiner.de
· May 28
If you want to build Web Components with Svelte this Svelte Summit talk from @theosteiner.de is for you — Ultimate Guide to Building Web Components with Svelte.
www.youtube.com/watch?v=lDWf...
www.youtube.com/watch?v=lDWf...
Ultimate Guide to Building Web Components with Svelte, Theodor Steiner — Svelte Summit Spring 2025
YouTube video by Svelte Society
www.youtube.com
this is the talk @rich-harris.dev and big javascript don't want you to see!
fun fact: the illuminati actually orchestrated two power outages during my talk, but thanks to the magic of editing you don't have to suffer through my attempts of filling the breaks with awkward jokes
fun fact: the illuminati actually orchestrated two power outages during my talk, but thanks to the magic of editing you don't have to suffer through my attempts of filling the breaks with awkward jokes
fun chatgpt behavior: if you mix languages in your prompts often enough, it’ll eventually start babbling back like a true polyglot
December 26, 2025 at 7:51 AM
fun chatgpt behavior: if you mix languages in your prompts often enough, it’ll eventually start babbling back like a true polyglot
When an influencer you like talks about a topic you're actually knowledgeable on & suddenly you wonder whether you have been gobbling L-takes takes all along
December 19, 2025 at 2:47 AM
When an influencer you like talks about a topic you're actually knowledgeable on & suddenly you wonder whether you have been gobbling L-takes takes all along
people taking the high horse on the react vulns really piss me off..
your tribalist low-effort dunks just show that you don't understand how pushing the envelope always comes with risks for new exploits!
much love from the svelte community to all the react folks working overtime to keep people save
your tribalist low-effort dunks just show that you don't understand how pushing the envelope always comes with risks for new exploits!
much love from the svelte community to all the react folks working overtime to keep people save
December 12, 2025 at 4:04 AM
people taking the high horse on the react vulns really piss me off..
your tribalist low-effort dunks just show that you don't understand how pushing the envelope always comes with risks for new exploits!
much love from the svelte community to all the react folks working overtime to keep people save
your tribalist low-effort dunks just show that you don't understand how pushing the envelope always comes with risks for new exploits!
much love from the svelte community to all the react folks working overtime to keep people save
CSS wrapped has absolutely no business being this cute. I love it.
🎉 CSS Wrapped 2025 is here!
Once again, it has been an AMAZING year for CSS and UI.
Go check out chrome.dev/css-wrapped-... to see all CSS/UI features Chrome shipped this year.
Each features comes with a small explanation and demo for you to play with.
Once again, it has been an AMAZING year for CSS and UI.
Go check out chrome.dev/css-wrapped-... to see all CSS/UI features Chrome shipped this year.
Each features comes with a small explanation and demo for you to play with.
December 9, 2025 at 1:01 PM
CSS wrapped has absolutely no business being this cute. I love it.
Went to the pharmacy to buy cough sirup for my girlfriend
Pharmacist: Is this medicine for you?
Me: No, for my partner.
Pharmacist: Okay. Is your partner an adult?
...excuse me? 🤣🤣🤣
Pharmacist: Is this medicine for you?
Me: No, for my partner.
Pharmacist: Okay. Is your partner an adult?
...excuse me? 🤣🤣🤣
December 3, 2025 at 7:13 AM
Went to the pharmacy to buy cough sirup for my girlfriend
Pharmacist: Is this medicine for you?
Me: No, for my partner.
Pharmacist: Okay. Is your partner an adult?
...excuse me? 🤣🤣🤣
Pharmacist: Is this medicine for you?
Me: No, for my partner.
Pharmacist: Okay. Is your partner an adult?
...excuse me? 🤣🤣🤣
@sakito.bsky.social opening up #fec_kansai with a meta talk on why we follow frontend technology and go to conferences.
For me personally it's always the hallway track that makes offline conferences special
For me personally it's always the hallway track that makes offline conferences special
November 30, 2025 at 2:21 AM
@sakito.bsky.social opening up #fec_kansai with a meta talk on why we follow frontend technology and go to conferences.
For me personally it's always the hallway track that makes offline conferences special
For me personally it's always the hallway track that makes offline conferences special
In Osaka for Frontend Conference Kansai over the weekend!
#fec_kansai
#fec_kansai
November 29, 2025 at 4:55 AM
In Osaka for Frontend Conference Kansai over the weekend!
#fec_kansai
#fec_kansai
When you have the great idea to use the office whiteboard to illustratively explain some architecture to your colleagues, only to be reminded of your motor skills not having improved since pre school 😭
Thank god for excalidraw!
Thank god for excalidraw!
November 28, 2025 at 2:22 AM
When you have the great idea to use the office whiteboard to illustratively explain some architecture to your colleagues, only to be reminded of your motor skills not having improved since pre school 😭
Thank god for excalidraw!
Thank god for excalidraw!
Reposted by Theo-Steiner
I'm looking for my next opportunity in the front-end space 🌐
I've worked at some great companies: Hugging Face, V7, Appwrite, and Significa.
I've built NPM packages with 400k downloads/week, and am an avid open-source contributor.
Let me know if you want to work together!
I've worked at some great companies: Hugging Face, V7, Appwrite, and Significa.
I've built NPM packages with 400k downloads/week, and am an avid open-source contributor.
Let me know if you want to work together!
November 24, 2025 at 10:36 PM
I'm looking for my next opportunity in the front-end space 🌐
I've worked at some great companies: Hugging Face, V7, Appwrite, and Significa.
I've built NPM packages with 400k downloads/week, and am an avid open-source contributor.
Let me know if you want to work together!
I've worked at some great companies: Hugging Face, V7, Appwrite, and Significa.
I've built NPM packages with 400k downloads/week, and am an avid open-source contributor.
Let me know if you want to work together!
VueFesで知り合った@danabra.movさんは日本で就活しているそうです！！
Danほどの最強レベルのエンジニアを雇える機会は滅多にないと思うので、英語でコミュニケーションとているチームなら、是非オファー出してみてください🙇♂️
pinging everyone who is hiring for English speaking engineers in Japan, this is your chance
Hire Dan to not only 10x your team, but also help him achieve his dream of living in Kyoto!
Danほどの最強レベルのエンジニアを雇える機会は滅多にないと思うので、英語でコミュニケーションとているチームなら、是非オファー出してみてください🙇♂️
pinging everyone who is hiring for English speaking engineers in Japan, this is your chance
Hire Dan to not only 10x your team, but also help him achieve his dream of living in Kyoto!
i'm looking for a new job
Hire Me in Japan — overreacted
I'm looking for a new job.
overreacted.io
November 10, 2025 at 4:08 PM
VueFesで知り合った@danabra.movさんは日本で就活しているそうです！！
Danほどの最強レベルのエンジニアを雇える機会は滅多にないと思うので、英語でコミュニケーションとているチームなら、是非オファー出してみてください🙇♂️
pinging everyone who is hiring for English speaking engineers in Japan, this is your chance
Hire Dan to not only 10x your team, but also help him achieve his dream of living in Kyoto!
Danほどの最強レベルのエンジニアを雇える機会は滅多にないと思うので、英語でコミュニケーションとているチームなら、是非オファー出してみてください🙇♂️
pinging everyone who is hiring for English speaking engineers in Japan, this is your chance
Hire Dan to not only 10x your team, but also help him achieve his dream of living in Kyoto!
Felt creative after watching an episode of "the bear", so I made a scallop carpaccio with grapefruit & papaya!
November 9, 2025 at 1:12 PM
Felt creative after watching an episode of "the bear", so I made a scallop carpaccio with grapefruit & papaya!
At @vuefes.bsky.social right now, and I have to say that this conference just has such a cool vibe!
Came as a spy from @svelte.dev last year expecting to be booed out of the building, but instead left with vuetiful friends & cool ideas seeded into my head
so I'm obviously back for seconds this year!
Came as a spy from @svelte.dev last year expecting to be booed out of the building, but instead left with vuetiful friends & cool ideas seeded into my head
so I'm obviously back for seconds this year!
October 25, 2025 at 5:32 AM
At @vuefes.bsky.social right now, and I have to say that this conference just has such a cool vibe!
Came as a spy from @svelte.dev last year expecting to be booed out of the building, but instead left with vuetiful friends & cool ideas seeded into my head
so I'm obviously back for seconds this year!
Came as a spy from @svelte.dev last year expecting to be booed out of the building, but instead left with vuetiful friends & cool ideas seeded into my head
so I'm obviously back for seconds this year!
Let's go!!
#SvelteJapan offline meetup at deno's beautiful shibuya office (40th floor!!!)
#SvelteJapan offline meetup at deno's beautiful shibuya office (40th floor!!!)
October 24, 2025 at 10:13 AM
Let's go!!
#SvelteJapan offline meetup at deno's beautiful shibuya office (40th floor!!!)
#SvelteJapan offline meetup at deno's beautiful shibuya office (40th floor!!!)
Since @dominikg.dev is in town for @vuefes.bsky.social we're doing a @svelte.dev Japan meetup on Friday at the beautiful DeNA office in Shibuya with an amazing view of Tokyo's skyline 🌃
Feel free to swing by, no matter the color of your preferred framework!
(we'll have both Japanese & English talks)
Feel free to swing by, no matter the color of your preferred framework!
(we'll have both Japanese & English talks)
Svelte Japan Offline Meetup #5 (2025/10/24 19:00〜)
# Svelte Japan Offline Meetup #5 Svelteに関することならなんでもOKのLTイベント。 ベテランも初心者も大歓迎です。 Svelte-related topics are all welcome at this LT event. Everyone is welcome! # Special Guest 今回は Svelte, Vite コアメンバーの ...
svelte-jp.connpass.com
October 19, 2025 at 3:52 AM
Since @dominikg.dev is in town for @vuefes.bsky.social we're doing a @svelte.dev Japan meetup on Friday at the beautiful DeNA office in Shibuya with an amazing view of Tokyo's skyline 🌃
Feel free to swing by, no matter the color of your preferred framework!
(we'll have both Japanese & English talks)
Feel free to swing by, no matter the color of your preferred framework!
(we'll have both Japanese & English talks)
we just forked it
In honor of spooky month, share a 4 word horror story that only someone in your profession would understand
I'll go first: Six page commercial lease.
I'll go first: Six page commercial lease.
October 14, 2025 at 5:03 PM
we just forked it
watched the @remix.run announcement and have thoughts..
👍 what I liked first:
- adopting a retained setup scope for state is great, retained mode simply fits the web's model better than immediate mode
- typesafe events look really cool, perhaps even as an agnostic library for other frameworks
1/5
👍 what I liked first:
- adopting a retained setup scope for state is great, retained mode simply fits the web's model better than immediate mode
- typesafe events look really cool, perhaps even as an agnostic library for other frameworks
1/5
October 13, 2025 at 8:06 AM
watched the @remix.run announcement and have thoughts..
👍 what I liked first:
- adopting a retained setup scope for state is great, retained mode simply fits the web's model better than immediate mode
- typesafe events look really cool, perhaps even as an agnostic library for other frameworks
1/5
👍 what I liked first:
- adopting a retained setup scope for state is great, retained mode simply fits the web's model better than immediate mode
- typesafe events look really cool, perhaps even as an agnostic library for other frameworks
1/5
not quite convinced by copilot's next edit suggestions just yet.. sure, it's cool when they're spot on, but most of the time stuff is just bat shit crazy..
like, wdym you don't want to merge those two totally unrelated functions for no reason whatsoever? No, how 'bout I add a few braces for ya?
like, wdym you don't want to merge those two totally unrelated functions for no reason whatsoever? No, how 'bout I add a few braces for ya?
October 8, 2025 at 7:49 AM
not quite convinced by copilot's next edit suggestions just yet.. sure, it's cool when they're spot on, but most of the time stuff is just bat shit crazy..
like, wdym you don't want to merge those two totally unrelated functions for no reason whatsoever? No, how 'bout I add a few braces for ya?
like, wdym you don't want to merge those two totally unrelated functions for no reason whatsoever? No, how 'bout I add a few braces for ya?
today was a good day because I managed to sneak a do/while loop into production code at work
October 7, 2025 at 1:10 PM
today was a good day because I managed to sneak a do/while loop into production code at work
素敵なゲストと一緒に@vuefes.bsky.socialを盛り上げるUIT INSIDEエピソードを収録してきました〜 🎉
来月開催されるVue Fes Japan 2025をより楽しみになるようなエピソードになったので、ぜひ聞いてみてください 🙇♂️
I had the absolute pleasure of having @kazupon.dev, @antfu.me & yogo join me on the UIT INSIDE podcast to chat about the upcoming Vue Fes Japan 2025!
来月開催されるVue Fes Japan 2025をより楽しみになるようなエピソードになったので、ぜひ聞いてみてください 🙇♂️
I had the absolute pleasure of having @kazupon.dev, @antfu.me & yogo join me on the UIT INSIDE podcast to chat about the upcoming Vue Fes Japan 2025!
ep.180『コミュニティースターと語るVue Fes Japan 2025 の魅力』 | UIT INSIDE
@TheoSteiner が、 @kazupon, @antfu7, @yogoescentier とともに Vue Fes Japan 2025 の魅力について語りました。
Vue Fes Japan
[](https://vuefes.jp/2025/)
https://vuefes.jp/2025/
ゲスト
kazupon
https://x.com/kazupon
Anthony Fu
h...
uit-inside.linecorp.com
September 26, 2025 at 10:14 AM
素敵なゲストと一緒に@vuefes.bsky.socialを盛り上げるUIT INSIDEエピソードを収録してきました〜 🎉
来月開催されるVue Fes Japan 2025をより楽しみになるようなエピソードになったので、ぜひ聞いてみてください 🙇♂️
I had the absolute pleasure of having @kazupon.dev, @antfu.me & yogo join me on the UIT INSIDE podcast to chat about the upcoming Vue Fes Japan 2025!
来月開催されるVue Fes Japan 2025をより楽しみになるようなエピソードになったので、ぜひ聞いてみてください 🙇♂️
I had the absolute pleasure of having @kazupon.dev, @antfu.me & yogo join me on the UIT INSIDE podcast to chat about the upcoming Vue Fes Japan 2025!
I can't believe I have to say this, but "space" is not a good hot key for your ai feature if you're building a goddamn text editor?!
September 12, 2025 at 10:08 AM
I can't believe I have to say this, but "space" is not a good hot key for your ai feature if you're building a goddamn text editor?!
デザイナーとフロントエンドエンジニアがこうりゅうする #CreatorsVision volume 2に参加〜
volume 1が面白すぎて、めっちゃ期待してまーす
volume 1が面白すぎて、めっちゃ期待してまーす
September 10, 2025 at 10:12 AM
デザイナーとフロントエンドエンジニアがこうりゅうする #CreatorsVision volume 2に参加〜
volume 1が面白すぎて、めっちゃ期待してまーす
volume 1が面白すぎて、めっちゃ期待してまーす
spotify somehow managed to get itself into the state where it suddenly forgot that I was a premium user on my work device, whereas everything continued just working fine on mobile..
re-login fixed the issue, but I'm utterly confused as to what went wrong here
re-login fixed the issue, but I'm utterly confused as to what went wrong here
September 10, 2025 at 6:24 AM
spotify somehow managed to get itself into the state where it suddenly forgot that I was a premium user on my work device, whereas everything continued just working fine on mobile..
re-login fixed the issue, but I'm utterly confused as to what went wrong here
re-login fixed the issue, but I'm utterly confused as to what went wrong here
babe wake up, new JavaScript framework just dropped!
Ripple's statement based templating really reminds me of SwiftUI, never understood why JSX didn't go this way in the first place
given @trueadm.dev's track record with inferno, lexical & at the @svelte.dev core team you better keep an eye on this!
Ripple's statement based templating really reminds me of SwiftUI, never understood why JSX didn't go this way in the first place
given @trueadm.dev's track record with inferno, lexical & at the @svelte.dev core team you better keep an eye on this!
Ripple now has a website!
www.ripplejs.com
If anyone wants to contribute to fixing/improving it, be my guest – github.com/trueadm/ripple.
www.ripplejs.com
If anyone wants to contribute to fixing/improving it, be my guest – github.com/trueadm/ripple.
September 2, 2025 at 1:13 AM
babe wake up, new JavaScript framework just dropped!
Ripple's statement based templating really reminds me of SwiftUI, never understood why JSX didn't go this way in the first place
given @trueadm.dev's track record with inferno, lexical & at the @svelte.dev core team you better keep an eye on this!
Ripple's statement based templating really reminds me of SwiftUI, never understood why JSX didn't go this way in the first place
given @trueadm.dev's track record with inferno, lexical & at the @svelte.dev core team you better keep an eye on this!
I'd consider myself an AI sloptimist
August 27, 2025 at 5:14 PM
I'd consider myself an AI sloptimist