Julien Roche

Mentoss 0.13.0 has been released!

✨ Added MockAgent class for undici Dispatcher support

Details:
https://github.com/human...

GitHub - bellard/mquickjs: Public repository of the Micro QuickJS Javascript Engine Public repository of the Micro QuickJS Javascript Engine - bellard/mquickjs

Micro QuickJS is a new JavaScript engine by the famous Fabrice Bellard 🎉

📖 Written in C
🗜️ Uses 100 kB ROM
⚠️ Supports a subset of JS close to ES5
🐏 Runs programs in as little as 10 kB of RAM
🔥 Speed is comparable to the full QuickJS engine

github.com/bellard/mqui...

I think `animation-composition: accumulate` is gonna see more action with `random()`, as it's like "take what you already got as a value and augment it rather than replace it".

Here's a parallax thing where randomly-fixed-positioned stars are moved different amounts (with a scroll-driven animation)

inherit() is going to be absolutely huge for working with CSS custom properties. Two big things it'll enable:

Nested indentation:

--indent: calc(inherit(--indent, 0) + 1);

Overridable design token defaults:

--primary-color: inherit(--primary-color, blue);

State of JavaScript 2025 Take the State of JavaScript survey

Go take the State of JavaScript 2025 survey if you have a minute! survey.devographics.com/survey/state...

How modern browsers work A web developers guide to browser internals

✍️ How modern browsers work addyo.substack.com/p/how-modern... - my write-up on browser internals for web developers

Transformers Laid Out by Pramod Goyal

- Give an intuition of how transformers work
- Explain what each section of the paper means and how you can understand and implement it
- Code it down using PyTorch from a beginners perspective

goyalpramod.github.io/blogs/Transf...

GCC, la suite de compilation du projet GNU, est disponible en versio 15.2. C'est principalement une version de maintenance, corrigeant au passage 123 bugs divers ⬇️

gcc.gnu.org/pipermail/gc...

new Date("wtf") How well do you know JavaScript's Date class?

I made a quiz about the JS Date parser is. It's very easy and you will score very high.

jsdate.wtf

Firefox shipping scheduler.postTask() and scheduler.yield() for all your long task-avoiding scheduling needs!!

#anime

🤯

Ooh what?!

I honestly had no idea about that!
And it works like a charm! ✨

Chrome 139.0.7244.0 canary with "Experimental Web Platform features" enabled.

vtbag.dev/basics/hide-...

View transitions clipped at their container!

"Samuel" french animated series by Emilie Tronche is coming to Netflix (worldwide) :-]
variety.com/2025/tv/glob...

Transparent peer review to be extended to all of Nature’s research papers From today, all new submissions to Nature that are published will be accompanied by referees’ reports and author responses — to illuminate the process of producing rigorous science.

From today, all new submissions to Nature that are published will be accompanied by referees’ reports and author responses — to illuminate the process of producing rigorous science

https://go.nature.com/4kIRR01

(comic) AI Chronicles: Vibe code

I'm happy because this change means TypeScript defaults and Node defaults are converging 👍

Node does not support Import Elision which means it's important to enable "verbatimModuleSyntax"

vMS means the developer knows if an import statement/binding will be deleted - all via the `type` keyword.

Deux vies de la même vallée suisse, au dessus "avant" un village dans la verdure et dessous "après" le même village enseveli sous la roche

C'est encore plus terrifiant sous cet angle

Complete Monorepo Guide: pnpm + Workspace + Changesets (2025) Learn how to build scalable monorepo projects using pnpm workspace and changesets. Complete guide with code examples, best practices, and version management strategies for modern JavaScript developmen...

Mastering Modern Monorepo Development with pnpm, Workspaces jsdev.space/complete-mon... #javascript #nodejs #monorepo

Firefox 139 for developers - Mozilla | MDN This article provides information about the changes in Firefox 139 that affect developers. Firefox 139 is the current Beta version of Firefox and ships on May 27, 2025.

ECMAScript excitement 😉

Firefox 139 ships the TC39 Stage 3 Temporal proposal 🎉

It's about time.

Congrats to those who worked on the implementation including Andre Bargull & Dan Minor 👍

developer.mozilla.org/en-US/docs/M...

Un mystérieux chevalier en armure rouillée sort de l’océan et passe à côté d’une vieille barque échouée dans laquelle se cachent deux enfants, un petit frère et sa grande sœur.

Notre projet de long métrage en animation « Le Chevalier Englouti » est dans la sélection officielle des pitchs MIFA 2025 Annecy Festival !
Toute l’équipe sera sur pkace pour présenter le projet, le mercredi 11 juin à 10h45 !

Are you familiar with Browser FingerPrint? We, user, have got some naive behavior.

Are you familiar with Browser FingerPrint?
medium.com/@rochejul/ar...

I turn 13 on @codepen.io in June, so here are my 13 most hearted demos:

1️⃣ 1092 ♥️ #CSS infinite #scroll gallery codepen.io/thebabydino/... my only one to ever get to 1K ♥️ without being in most hearted of the year

mostly CSS scroll-driven animations + tiniest bit of JS (~200 bytes for infinity part)

If you know one square number, you can mentally calculate the next square number! Here's how:

A model set of guidelines for RESTful APIs and Events, created by Zalando: opensource.zalando.com/restful-api-...

5️⃣ 850 ♥️ No SVG, no image fluid slider codepen.io/thebabydino/...
JS used only for
a) feature support detection
b) updating slider value in --val

Uses only
1 × input[type=range] for actual slider
1 × output for current value display
1 × datalist for ruler

One of my best sliders on @codepen.io.
#CSS

feColorMatrix: swap channels ☆ interactive demo, adaptive layout Interactive demo to illustrate swapping two RGB channels via the SVG `feColorMatrix`. The idea is simple: if a pixel in the image is `rgb(35, 79, 185)...

A cool thing I made on #CodePen: interactive demo illustrating how to use #SVG `feColorMatrix` to swap 2 channels of its input.

codepen.io/thebabydino/...

Viewport adaptive. Heavily commented code if you want to check how the demo works in the back. Makes use of modern #CSS features.

Made with ❤️.

<syntax-highlight> element - Web Component A <syntax-highlight> web component that uses the CSS Custom Highlight API.

<syntax-highlight>

A custom element that uses the CSS Custom Highlight API for syntax highlighting

Link: andreruffert.github.io/syntax-highl...

ECMAScript excitement 😉

TC39 will consider these JS proposals for stage movement at this week's meeting 🎉

2️⃣.7️⃣ Immutable ArrayBuffer
2️⃣ Upsert
🗑️ Record & Tuple
0️⃣ Compare strings by codepoint
0️⃣ Composite Keys
0️⃣ Disposable AsyncContext
0️⃣ Enum
0️⃣ Non-extensible applies to private
0️⃣ Object.propertyCount

Modern CSS Theming | Light Mode / Dark Mode and More! YouTube video by Syntax

Modern CSS has a ton of useful functions and properties that make supporting light and dark mode a breeze.

I showcase several of them, show how to make a CSS only theme switcher and how to save a users theme preference to localStorage.

Watch 🍿: www.youtube.com/watch?v=F1s8...

Want to give a responsive irregular shape depending on text content/ viewport rounded corners? Here's a super simple pure #CSS + #SVG #filter demo on @codepen.io doing it codepen.io/thebabydino/...

Heavily commented. See also bsky.app/profile/anat... for details about some of the filter primitives.