Author | Lightnews

Simeon.__proto__

Simeon.__proto__

@dotproto.com

730 followers 510 following 740 posts

Lover of the open web, keyboards, browser extensions, ceramics, and video games. Currently: Add-ons DevRel at Mozilla, co-chair of the W3C WebExtensions Community Group Previously: Chrome, video game industry

Posts Media Videos Starter Packs

Reposted by Simeon.__proto__

Luke @lukewarlow.dev · 22h

Command invokers soon to be baseline newly available!

Also field-sizing is finally here.

Some other nice changes too!

Jen Simmons @jensimmons.bsky.social · 22h

Curious about web technology coming to Safari? How about field-sizing, position-visibility, random(), scrollbar-color, hidden=until-found, auto-expanding

, command & commandfor, Largest Contentful Paint, CHIPS, scrollend event, Navigation API & more!

developer.apple.com/documentatio...

Safari 26.2 Beta Release Notes | Apple Developer Documentation

Released November 4, 2025 — 26.2 beta (20623.1.12)

developer.apple.com

Simeon.__proto__ @dotproto.com · 20h

He's only been there for a bit over 4 years, give him a break

Simeon.__proto__ @dotproto.com · 21h

Fair concern. My gut is yeah, people would probably end up building some weird, inaccessible stuff. I say that as someone who has committed their fair share of CSS crimes in the name of experimentation and seeing what's possible 😅

Simeon.__proto__ @dotproto.com · 21h

Clear would return the element to the unset state and set would set a specific (arbitrary) value. Combine that with recent css functions and custom properties and I bet you could implement some pretty complex interactions between just HTML and CSS

Simeon.__proto__ @dotproto.com · 21h

My original thought was add, remove, toggle commands to modify a single well known Boolean flag. That internal state could be exposed too CSS via a well known function, pseudo selector, or attribute

Then I thought about genericising that further with support for arbitrary (numeric?) values

Simeon.__proto__ @dotproto.com · 21h

The MDN page mentions request-close, but I don't see that in the spec

Is the aim to offer a set of built in commands that operate on the element specified in the commandFor attribute? I'm imaging a basic set of commands like set, clear, and toggle that devs could work with without JS

Simeon.__proto__ @dotproto.com · 21h

Oh, interesting!

On first read MDN's description of it as "a way to declaratively assign behaviors to buttons…" scared me 'cause I thought there would be no way to adjust bindings after initialization, but it's all standard element attributes and such. Nice :D
developer.mozilla.org/en-US/docs/W...

Invoker Commands API - Web APIs | MDN

The Invoker Commands API provides a way to declaratively assign behaviors to buttons, allowing control of interactive elements when the button is enacted (clicked or invoked via a keypress, such as th...

developer.mozilla.org

Simeon.__proto__ @dotproto.com · 2d

Only just found out that Mozilla officially "migrated the source of truth for Firefox from" hg.mozilla.org to github.com/mozilla-firefox/firefox on 30th April 2025

groups.google.com/a/mozilla.or...

Engineering Effectiveness Newsletter (Q2 2025 Edition)

groups.google.com

Simeon.__proto__ @dotproto.com · 4d

Non-trader, thank you

Simeon.__proto__ @dotproto.com · 4d

Why no games? Games are good

Simeon.__proto__ @dotproto.com · 5d

Hoping for the best 🫰

Simeon.__proto__ @dotproto.com · 5d

When it comes to app store policy compliance checks, passing doesn't mean there weren't any violations, it means that there weren't any OBSERVED violations

There's a world of difference between those two

Simeon.__proto__ @dotproto.com · 5d

Oh, those are quality ears too!

Simeon.__proto__ @dotproto.com · 6d

Stressed about this project

New stationary will surely fix me

Simeon.__proto__ @dotproto.com · 7d

Shower thought: if tech bros existed in the Victorian era, would they think antidepressants were a form of biohacking?

Simeon.__proto__ @dotproto.com · 8d

"‘It’s about redemption’: Peter Molyneux says Masters of Albion will make up for decades of ‘overpromising on things’", yet again overpromising

Simeon.__proto__ @dotproto.com · 9d

It's the technique a given designer uses to prepare their coffee or tea before starting the work day

Simeon.__proto__ @dotproto.com · 12d

The rules are for you, not them

Simeon.__proto__ @dotproto.com · 13d

GitHub's website is timing out and I was cleaning up my PR backlog

20 minutes in. Guess it's time to throw in the towel for the day

Reposted by Simeon.__proto__

Mat “Wilto” Marquis @wil.to · 13d

I’d never tell anyone they MUST* understand JavaScript to work on the web, but I will make the case that one SHOULD*. To understand JavaScript is to know the boundaries of how users can interact with your medium — any role is improved by that.
wil.to/newsletters/...

* www.rfc-editor.org/rfc/rfc2119

What Understanding JavaScript Gets You

Simeon.__proto__ @dotproto.com · 13d

Very good temple

Simeon.__proto__ @dotproto.com · 21d

Morning!

Simeon.__proto__ @dotproto.com · 21d

I've hit the point in staying up too late that I can't tell when I'm actually tired enough to fall asleep (it's 4 AM)

Simeon.__proto__ @dotproto.com · 21d

Folks seem to be going wild for Megabonk. I tried the demo a week or two back and bounced off of it. I feel like I'm missing something 🤔

Simeon.__proto__ @dotproto.com · 21d

I keep hitting annoying keyboard usability bugs every time I pick up my iPad

- floating keyboard moving around unusably when positioned too close to the bottom of the screen
- in iPhone compatibility mode, the keyboard gets stuck on press-and-hold keys
- unfinished graphics on the floating keyboard