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Posts by Anne van Kesteren

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WebKit Privacy & Adtech Engineer - Jobs - Careers at Apple Apply for a WebKit Privacy & Adtech Engineer job at Apple. Read about the role and find out if it’s right for you.

I'm hiring to the WebKit Privacy & Adtech team! Help us prevent online tracking/fingerprinting, and design+implement privacy-preserving alternatives for use in advertising.
· Systems programming in C++ & Swift
· Location: Cupertino
· Work that feels good and important
jobs.apple.com/en-us/detail...

1 month ago 9 9 1 0

If you have existential feelings about the state of your software stack, just remember that on the web it’s completely undefined which element a mouse click returns.

2 months ago 10 2 3 0

Evergreen sentiment. (If you always wanted to be a specification editor, wiki.whatwg.org/wiki/Specs/t... has some suggestions. Most still relevant.)

6 months ago 3 0 0 0

Web component folks: A common feature with request is to "inherit from a button". If that's something you want, which specific button behaviours is it you want to inherit? Why is putting a button in the shadow root not the answer?

6 months ago 30 12 16 0

File an issue against whatwg/dom and we can explore. I’d imagine @lcas.dev and @nicr.dev to have thoughts about this.

8 months ago 2 0 0 0

Congratulations! Hope this means I’ll see you at TPAC. Does this mean @surma.dev will soon return to the web platform as well? 😊

8 months ago 6 0 1 0

I work as an elder and hospice caregiver, which I am oddly passionate about. I can love on them shamelessly and no one complains about my codependence. It's a win-win situation. 

Many of my caregiving colleagues complain about the repetitive questions and, sometimes reactions, of the elderly, especially when those patients happen to read the newspaper, especially with the current downward spiral of our country — as if these people haven't lived through enough horror...

I love my dementia peeps, but sometimes wonder if there's a Guinness Book World Record for how many times an hour a dementia patient can repeat the same question — it's got to be in the hundreds. At least with small children, they ask different questions. Dementia patients will get stuck on one short question and ask it until you can interrupt their train(carousel) of thought and successfully redirect their attention. That carousel is pretty manic sometimes. 

A couple days ago, I picked up my mail from the post office and drove over to the nursing home to take (let's call her "Miss Daisy") Miss Daisy out for a drive. Before we took off on our road trip, to the end of The Road and back, in our landlocked little town (Juneau, Alaska), I set my copy of The Onion down in front of her. 

Over our two-hour excursion, tiny Miss Daisy read that front page at least a dozen times and each time she would snicker, giggle, and guffaw, then put it down on the dash board and, a minute later, discover it anew. I think it was the best afternoon of my life. We don't often hear them laugh and when they do, it's the sweetest thing you've ever heard. 

...

Thank you, thank you, thank you, for the really important work all of you do. You make the world a better place.

I work as an elder and hospice caregiver, which I am oddly passionate about. I can love on them shamelessly and no one complains about my codependence. It's a win-win situation. Many of my caregiving colleagues complain about the repetitive questions and, sometimes reactions, of the elderly, especially when those patients happen to read the newspaper, especially with the current downward spiral of our country — as if these people haven't lived through enough horror... I love my dementia peeps, but sometimes wonder if there's a Guinness Book World Record for how many times an hour a dementia patient can repeat the same question — it's got to be in the hundreds. At least with small children, they ask different questions. Dementia patients will get stuck on one short question and ask it until you can interrupt their train(carousel) of thought and successfully redirect their attention. That carousel is pretty manic sometimes. A couple days ago, I picked up my mail from the post office and drove over to the nursing home to take (let's call her "Miss Daisy") Miss Daisy out for a drive. Before we took off on our road trip, to the end of The Road and back, in our landlocked little town (Juneau, Alaska), I set my copy of The Onion down in front of her. Over our two-hour excursion, tiny Miss Daisy read that front page at least a dozen times and each time she would snicker, giggle, and guffaw, then put it down on the dash board and, a minute later, discover it anew. I think it was the best afternoon of my life. We don't often hear them laugh and when they do, it's the sweetest thing you've ever heard. ... Thank you, thank you, thank you, for the really important work all of you do. You make the world a better place.

I got permission to share this, and I'm extremely grateful for that.

The Onion got this letter from one of our subscribers in Alaska. She works with dementia patients and decided to leave a copy in the car for each one.

This email made my year. Read it and you'll see what I mean. People are good.

9 months ago 37345 6832 642 509
PNG is back!Rec. 2020 and Rec. 709 comparison After 20 years, PNG is back with renewed vigor! A new PNG spec was just released.

APNG finally graduated from its MozillaWiki documentation to a proper standard: www.programmax.net/articles/png...

9 months ago 9 1 0 0
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Learn more about Declarative Web Push - WWDC25 - Videos - Apple Developer Learn how Declarative Web Push can help you deliver notifications more reliably. Find out how to build on existing standards to be more...

If you want to learn more about Declarative Web Push or Web Push in general, my colleague Brady put out a great video: developer.apple.com/videos/play/...

10 months ago 25 5 1 0

Yes, you can do this:

<input type=color list=x><datalist id=x><option value=red><option value=blue></datalist>

10 months ago 1 0 0 0

There have been some requests for exposing the color as an object to JavaScript. Filing an issue against the HTML standard for alternate serialization formats seems reasonable.

11 months ago 3 0 1 0

Thanks to @jensimmons.bsky.social for significantly improving the above post; @patrickangle.net, @smfr.bsky.social, and Aditya for design feedback; Chris Lilley for improving the relevant CSS standards; and @domenic.me for helping out on the HTML side and filing the initial issue.

11 months ago 8 0 1 0
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Add wide gamut P3 and alpha transparency to your color picker in HTML Now HTML lets you create a color picker for wide gamut P3 color and for alpha transparency with two new attributes: <input type="color" colorspace="display-p3" alpha>, available today in Safari 18.4.

🥳 We added new attributes to HTML to enhance <input type=color>: webkit.org/blog/16900/p...

11 months ago 91 26 4 2

If you write code to make websites (HTML, CSS, JS, Web API, Media) and you get frustrated trying to wrangle your code to work in Safari, which bugs are blocking you? Which existing features would you most like to see improved? If you got a chance to order priorities which effort would you put first?

11 months ago 71 19 46 4

Please don't publish / release a polyfill for unshipped Web features. Someone is bound to use it in production and ruin it for everyone else.

1 year ago 9 4 0 0

I don’t see the relationship. Even if we had discovered it earlier, it would still lead to a lesser web standard. Literally doesn’t matter. The act of polyfilling is what is problematic. Not when we discover somebody did it.

1 year ago 0 0 1 0

I'll try to rephrase as all of this is besides the point I was trying to make. Which is that the polyfill (and others like it) limit the options we have in the design space. The end result is lesser web standards for everyone.

1 year ago 3 0 1 0
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No, ‪Nicolò understood it correctly.

1 year ago 1 0 1 0

I’m not sure how they help with this particular problem.

1 year ago 0 0 1 0

And yet another polyfill appears to have poisoned the standards well. This time for scoped custom element registries. People never learn. 🫠

1 year ago 10 2 2 1

I have at times told people that if you want to generate XML, you should use a serializer. So when I had to generate a serialized CSS URL value containing a data: URL of an SVG document of which colors could vary, I immediately went for string manipulation and concatenation. 😅

1 year ago 3 0 0 0
2025 Web Engines Hackfest Web Platform community event for people working on the different engines (Chromium/Blink/V8, Safari/WebKit/JSC, Firefox/Gecko/SpiderMonkey, Servo, Ladybird), on the testing side (WPT, Test262), or on ...

📅 Save the dates! The Web Engines Hackfest 2025 will take place June 2-4 in A Coruña, Galicia (Spain).
Check more details at: webengineshackfest.org

1 year ago 23 14 3 0

The aliens are coming and their goal is to invade and destroy Earth.

1 year ago 2 0 1 0

Almost time to sign off for the year. Web standard proposals to finish in (early?) 2025:

- Declarative Web Push
- Scoped Custom Element Registries
- HTML (and SVG & MathML) Sanitizer API
- moveBefore()
- fetchLater()
- float16 in 2D canvas
- <button command>

and quite a few more. Happy holidays!

1 year ago 23 2 2 0

Please describe why you and end users would want this behavior in the issue. The more compelling the story, the more likely you’ll nerd-snipe someone into fixing it.

1 year ago 3 0 0 0
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git blame as visualized by GitHub (or Searchfox for the HTML standard) is an amazing development tool for projects that span decades. In particular for projects that enforce good commit messages. Being able to answer why something is the way it is, can be crucial when changing it.

1 year ago 13 1 1 1
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Revamped Scoped Custom Element Registries · Issue #10854 · whatwg/html https://github.com/WICG/webcomponents/blob/gh-pages/proposals/Scoped-Custom-Element-Registries.md is a good proposal, but it ties the functionality too much to shadow roots. This is Ryosuke and I's...

@annevk.nl and I worked on a refined proposal to untie scoped element registry from shadow DOM so that you can use a scoped registry without shadow DOM. Your feedback is appreciated:
github.com/whatwg/html/...

1 year ago 19 7 0 0

Not having to observe mutations is an improvement I’d say! They’re very costly.

FWIW, it looks like the Chromium fix is incorrect (aside from being inelegant). It doesn't work for custom element callbacks.

1 year ago 2 0 1 0
MutationObserver doesn't observe style attribute change when resizing element by annevk · Pull Request #37902 · WebKit/WebKit 58477cb MutationObserver doesn&#39;t observe style attribute change when resizing element https://bugs.webkit.org/show_bug.cgi?id=266846 rdar://120109181 Reviewed by NOBODY (OOPS!). RenderLayer::...

Unfortunately I didn’t see this earlier. Curious to see how your fix compares to mine: github.com/WebKit/WebKi...

1 year ago 5 0 1 0
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IDNA Utils · Issue #274 · whatwg/url Ticket tracking discussion of restoring the URL.domainToASCII and URL.domainToUnicode functions or implementing something new. Summary Processing international domain name labels is tricky, slow, a...

There is? I assume you mean why there is no API? See github.com/whatwg/url/i...

1 year ago 0 0 0 0