Jovi 🐨
@jovidecroock.com
🇧🇪 | he/him | Software Engineer @Shopify | passionate about DX & web perf | opinions are my own
On a totally different subject, Belgium has increased VAT on gym membership and other sport related stuff. All while we know that exercise increases lifespan and logically extends to that reducing social security costs as people are healthier... Anything to increase taxes I guess...
November 27, 2025 at 4:50 PM
On a totally different subject, Belgium has increased VAT on gym membership and other sport related stuff. All while we know that exercise increases lifespan and logically extends to that reducing social security costs as people are healthier... Anything to increase taxes I guess...
To put this out there, last week I've stepped down as a maintainer of GraphQL-JS.
I've decided for myself that I spend a lot of time on OSS and I want to spend that time on projects where I can feel impactful. I wish my fellow ex-maintainers on the project the best of luck!
I've decided for myself that I spend a lot of time on OSS and I want to spend that time on projects where I can feel impactful. I wish my fellow ex-maintainers on the project the best of luck!
November 27, 2025 at 4:10 PM
To put this out there, last week I've stepped down as a maintainer of GraphQL-JS.
I've decided for myself that I spend a lot of time on OSS and I want to spend that time on projects where I can feel impactful. I wish my fellow ex-maintainers on the project the best of luck!
I've decided for myself that I spend a lot of time on OSS and I want to spend that time on projects where I can feel impactful. I wish my fellow ex-maintainers on the project the best of luck!
Reposted by Jovi 🐨
have been using preact for a side project recently and am thoroughly enjoying it
the signals dev tools are super nice too. would love to see similar exist for other frameworks, even just to visualise the signal networks/flows
the signals dev tools are super nice too. would love to see similar exist for other frameworks, even just to visualise the signal networks/flows
November 23, 2025 at 10:22 AM
have been using preact for a side project recently and am thoroughly enjoying it
the signals dev tools are super nice too. would love to see similar exist for other frameworks, even just to visualise the signal networks/flows
the signals dev tools are super nice too. would love to see similar exist for other frameworks, even just to visualise the signal networks/flows
Reposted by Jovi 🐨
one downside of LLMs in OSS is _huge_ walls of text in issues, where the text does technically make sense but reads like a student trying to meet a character limit 😅
November 21, 2025 at 9:27 AM
one downside of LLMs in OSS is _huge_ walls of text in issues, where the text does technically make sense but reads like a student trying to meet a character limit 😅
Never thought I'd experience the low of talking to a user, I mean LLM... For an entire issue. This is just beyond hopeless and a lot of my interactions have devolved into this...
github.com/preactjs/sig...
github.com/preactjs/sig...
Signals no longer auto-unwrap in JSX attributes (require .value) · Issue #801 · preactjs/signals
Signals no longer auto-unwrap in JSX attributes for boolean props Check if updating to the latest version resolves the issue Environment I am using @preact/signals-core I am using @preact/signals I...
github.com
November 20, 2025 at 8:57 PM
Never thought I'd experience the low of talking to a user, I mean LLM... For an entire issue. This is just beyond hopeless and a lot of my interactions have devolved into this...
github.com/preactjs/sig...
github.com/preactjs/sig...
My favorite AI benchmark nowadays is to take a semi-complex bug from the Preact/Signals repository (or an intersection thereof) and ask it to write a failing test.
Thus far I haven't been replaced as an OSS maintainer, not even by Gemini 3
Thus far I haven't been replaced as an OSS maintainer, not even by Gemini 3
November 18, 2025 at 5:53 PM
My favorite AI benchmark nowadays is to take a semi-complex bug from the Preact/Signals repository (or an intersection thereof) and ask it to write a failing test.
Thus far I haven't been replaced as an OSS maintainer, not even by Gemini 3
Thus far I haven't been replaced as an OSS maintainer, not even by Gemini 3
If taxing billionaires won’t work then taxing us won’t either, right?
November 14, 2025 at 7:57 AM
If taxing billionaires won’t work then taxing us won’t either, right?
I've felt a tendency of issues to be AI authored lately, they overly bear the frustration of the user pretty frequently and the reproductions are inaccurate a lot of the time. Has anyone else noticed this?
November 10, 2025 at 4:14 PM
I've felt a tendency of issues to be AI authored lately, they overly bear the frustration of the user pretty frequently and the reproductions are inaccurate a lot of the time. Has anyone else noticed this?
Reposted by Jovi 🐨
Vibe coding PRs - STOP please...
November 10, 2025 at 5:02 AM
Vibe coding PRs - STOP please...
Well, the last two months of 2025 are there and... I haven't published anything but open-source stuff.... Surely 2026 will be the year... Right? Right?
Me: 2025 is going to be the year I release some small product
Meanwhile: 2 finished things
Me: Ah they probably suck, let's keep it private
Meanwhile: 2 finished things
Me: Ah they probably suck, let's keep it private
November 7, 2025 at 8:22 AM
Well, the last two months of 2025 are there and... I haven't published anything but open-source stuff.... Surely 2026 will be the year... Right? Right?
Reposted by Jovi 🐨
Open source never stops: graphql-js v16.12.0 was just released 🚀
@jovidecroock.com is bringing the latest spec addition to the stable branch, such as operation descriptions and schema coordinates.
Check it out 👇
github.com/graphql/gra...
@jovidecroock.com is bringing the latest spec addition to the stable branch, such as operation descriptions and schema coordinates.
Check it out 👇
github.com/graphql/gra...
Release 16.12.0 · graphql/graphql-js
v16.12.0 (2025-11-01)
New Feature 🚀
#4482 Implement changes for executable descriptions (@JoviDeCroock)
#4493 Backport schema coordinates (@JoviDeCroock)
Bug Fix 🐞
#4392 Catch unhandled exceptio...
github.com
November 1, 2025 at 8:03 PM
Open source never stops: graphql-js v16.12.0 was just released 🚀
@jovidecroock.com is bringing the latest spec addition to the stable branch, such as operation descriptions and schema coordinates.
Check it out 👇
github.com/graphql/gra...
@jovidecroock.com is bringing the latest spec addition to the stable branch, such as operation descriptions and schema coordinates.
Check it out 👇
github.com/graphql/gra...
Reposted by Jovi 🐨
Here's a toy app using
@preactjs.com
+ signals and
@nitro.build
(to avoid the browser's CORS error)
It's an example on one of the ways you can use signals and how most of the App logic can be changed to just listening to values as compared to dealing with hooks 1/n
@preactjs.com
+ signals and
@nitro.build
(to avoid the browser's CORS error)
It's an example on one of the ways you can use signals and how most of the App logic can be changed to just listening to values as compared to dealing with hooks 1/n
October 25, 2025 at 4:56 PM
Here's a toy app using
@preactjs.com
+ signals and
@nitro.build
(to avoid the browser's CORS error)
It's an example on one of the ways you can use signals and how most of the App logic can be changed to just listening to values as compared to dealing with hooks 1/n
@preactjs.com
+ signals and
@nitro.build
(to avoid the browser's CORS error)
It's an example on one of the ways you can use signals and how most of the App logic can be changed to just listening to values as compared to dealing with hooks 1/n
I think I found a chromium bug - when using moveBefore on a focussed input where you have a selection range it loses its selection range.
Chrome bug: issues.chromium.org/issues/45482...
Chrome bug: issues.chromium.org/issues/45482...
Chromium
issues.chromium.org
October 24, 2025 at 7:13 PM
I think I found a chromium bug - when using moveBefore on a focussed input where you have a selection range it loses its selection range.
Chrome bug: issues.chromium.org/issues/45482...
Chrome bug: issues.chromium.org/issues/45482...
I forgot the golden rule of "Don't read the comments if someone posts your article to Hackernews and it hits frontpage"....
Signals flip the script. React renders where you create state. Signals render where you use state. Same state, but you are pushed into patterns that will lead to better performance by default. One paradigm shift away from memoization hell. 🎯
www.jovidecroock.com/blog/state-v...
www.jovidecroock.com/blog/state-v...
State and rerenders
Exploring the paradigm shift from 'render where you create state' to 'render where you use state'.
www.jovidecroock.com
October 20, 2025 at 3:56 PM
I forgot the golden rule of "Don't read the comments if someone posts your article to Hackernews and it hits frontpage"....
Signals flip the script. React renders where you create state. Signals render where you use state. Same state, but you are pushed into patterns that will lead to better performance by default. One paradigm shift away from memoization hell. 🎯
www.jovidecroock.com/blog/state-v...
www.jovidecroock.com/blog/state-v...
State and rerenders
Exploring the paradigm shift from 'render where you create state' to 'render where you use state'.
www.jovidecroock.com
October 18, 2025 at 2:17 PM
Signals flip the script. React renders where you create state. Signals render where you use state. Same state, but you are pushed into patterns that will lead to better performance by default. One paradigm shift away from memoization hell. 🎯
www.jovidecroock.com/blog/state-v...
www.jovidecroock.com/blog/state-v...
Reposted by Jovi 🐨
got laid off due to restructuring :(
i’m now available for mid+ frontend developer/software engineering positions
in the meantime, we’re back to building the future and fun on the web on atproto :)
i’m now available for mid+ frontend developer/software engineering positions
in the meantime, we’re back to building the future and fun on the web on atproto :)
October 17, 2025 at 1:46 AM
got laid off due to restructuring :(
i’m now available for mid+ frontend developer/software engineering positions
in the meantime, we’re back to building the future and fun on the web on atproto :)
i’m now available for mid+ frontend developer/software engineering positions
in the meantime, we’re back to building the future and fun on the web on atproto :)
Reposted by Jovi 🐨
”We fed our horse and a competing jet engine hay for a week and then measured their hooves. The results will astound you.”
Web dev discourse in 2025.
Web dev discourse in 2025.
October 14, 2025 at 3:46 PM
”We fed our horse and a competing jet engine hay for a week and then measured their hooves. The results will astound you.”
Web dev discourse in 2025.
Web dev discourse in 2025.
We were the AI of the Neanderthals
October 14, 2025 at 3:40 PM
We were the AI of the Neanderthals
I, as a person, am one big memory leak
October 13, 2025 at 4:18 PM
I, as a person, am one big memory leak
The 3 worst GraphQL myths:
❌ Everything is POST
❌ All URLs are /graphql
❌ Anyone can query anything
One solution destroys all three: Persisted Operations/Trusted documents
www.jovidecroock.com/blog/graphql...
❌ Everything is POST
❌ All URLs are /graphql
❌ Anyone can query anything
One solution destroys all three: Persisted Operations/Trusted documents
www.jovidecroock.com/blog/graphql...
GraphQL Myths
Common misconceptions about GraphQL and how persisted operations address them.
www.jovidecroock.com
October 12, 2025 at 10:25 AM
The 3 worst GraphQL myths:
❌ Everything is POST
❌ All URLs are /graphql
❌ Anyone can query anything
One solution destroys all three: Persisted Operations/Trusted documents
www.jovidecroock.com/blog/graphql...
❌ Everything is POST
❌ All URLs are /graphql
❌ Anyone can query anything
One solution destroys all three: Persisted Operations/Trusted documents
www.jovidecroock.com/blog/graphql...
Reposted by Jovi 🐨
I love all the cool experiments that are popping up in my feed.
The React model of putting everything into a component feels like it hindered progress. There are lots of cool explorations happening in every framework right now.
2026 will be an exciting year!
The React model of putting everything into a component feels like it hindered progress. There are lots of cool explorations happening in every framework right now.
2026 will be an exciting year!
October 11, 2025 at 9:26 AM
I love all the cool experiments that are popping up in my feed.
The React model of putting everything into a component feels like it hindered progress. There are lots of cool explorations happening in every framework right now.
2026 will be an exciting year!
The React model of putting everything into a component feels like it hindered progress. There are lots of cool explorations happening in every framework right now.
2026 will be an exciting year!
GraphQL should be an implementation detail
October 11, 2025 at 9:29 AM
GraphQL should be an implementation detail
Reposted by Jovi 🐨
Also doubles as a visualization of how Preact Signals work!
NVIDIA and OpenAi:
Concerns that their “increasingly complex and interconnected web of business transactions is artificially propping up the trillion-dollar AI boom.“
@bloomberg.com $NVDA 👀
www.bloomberg.com/news/feature...
Concerns that their “increasingly complex and interconnected web of business transactions is artificially propping up the trillion-dollar AI boom.“
@bloomberg.com $NVDA 👀
www.bloomberg.com/news/feature...
October 8, 2025 at 11:19 AM
Also doubles as a visualization of how Preact Signals work!
Anyone know a way to see overall open-source engagement within i.e. a programming language or a GitHub topic? I've been curious as it looks like engagement has dropped (PR/issue creation) while usage has gone up
October 7, 2025 at 5:00 PM
Anyone know a way to see overall open-source engagement within i.e. a programming language or a GitHub topic? I've been curious as it looks like engagement has dropped (PR/issue creation) while usage has gone up
Signals change the paradigm from, rerender where you create state to rerender where you use state.
It requires a different mindset but ultimately these are free performance gains
It requires a different mindset but ultimately these are free performance gains
October 2, 2025 at 9:49 AM
Signals change the paradigm from, rerender where you create state to rerender where you use state.
It requires a different mindset but ultimately these are free performance gains
It requires a different mindset but ultimately these are free performance gains