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Mat Simon

@matsimon.dev

Lead Software Engineer @derstandard.at Full Stack Developer (SvelteKit, SwiftUI) https://www.matsimon.dev Founder of https://www.pausly.app ⭐️ Musician https://www.yesmeno.com 🎸 🎀 🎹 πŸ₯ Blender enthusiast 🎨

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30.05.2023
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Latest posts by Mat Simon @matsimon.dev

We completely overhauled the user interface for unboxing new outfits. Hopefully you get to experience it soon :)

08.12.2025 21:06 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

High fiving has probably always been the most loved feature of Pausly.

It's now possible to directly click on the πŸ™Œ emoji to instantly react. No more stressing over finding the right emoji in time :)

08.12.2025 21:03 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

It has always been possible to replace single movements before starting a session, but it's now possible to replace them during a session as well!

Click on the settings button and hit the "Replace this movement" button and you'll instantly get a new one.

08.12.2025 20:58 πŸ‘ 0 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

πŸŽ‰ Happy 30-month anniversary to Container Queries – in every browser since Feb, 2023. It was supposed to be impossible, but here we are!

Why 2.5 years? Nothing will change tomorrow, but Baseline uses this milestone to signal confidence a feature has gained "wide" support.

youtu.be/bhHV0rQ3-CQ

13.08.2025 21:02 πŸ‘ 99 πŸ” 18 πŸ’¬ 5 πŸ“Œ 0
Preview
Simple but Effective Skeleton Loaders β€” Mat Simon Learn how to create a simple, effective skeleton loader component using just HTML and CSS, with full control over layout and design.

New blog post: simple, effective skeleton loaders using just HTML and CSS.

www.matsimon.dev/blog/simple-...

#css #html #svelte

02.07.2025 18:35 πŸ‘ 8 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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{@attach ...} β€’ Docs β€’ Svelte {@attach ...} β€’ Svelte documentation

This new #svelte feature is really exciting!

It's basically a more versatile replacement of actions.

15.05.2025 14:08 πŸ‘ 9 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

https://www.matsimon.dev

06.05.2025 21:01 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Asynchronous Svelte Β· sveltejs svelte Β· Discussion #15845 This is a long document; get yourself a cup of tea. tl;dr You can now use the await keyword in Svelte β€” in your <script>, inside $derived expressions, and in your markup β€” by installing the async b...

Very interesting... This will enable us to use `await` directly inside `<script>`, `$derived` and template code.

In a SvelteKit context, this potentially means that the `load` function will not remain the place to fetch your data, but that components can do that themselves.

#svelte

02.05.2025 07:45 πŸ‘ 7 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Promotional image from Adolescence on Netflix

Promotional image from Adolescence on Netflix

I recently watched Adolescence on Netflix and at the risk of sounding a bit iconoclastic, I’d like to offer some criticisms and concerns about how the mini-series (perhaps inadvertently) perpetuates some myths related to the online radicalization of men and boys.

03.04.2025 23:28 πŸ‘ 166 πŸ” 44 πŸ’¬ 9 πŸ“Œ 14

@tolin.ski Zero looks really promising to me and I love your Svelte adapter. Where and how do you deploy your zero-cache and what is your goto service for the PostgreSQL database?

29.03.2025 12:26 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Video thumbnail

The power of view transitions is absolutely mind-boggling. Things like this πŸ‘‡ are quickly done with some CSS (no hacks!) and no additional DOM elements. Wild! 🀯

27.01.2025 23:22 πŸ‘ 111 πŸ” 11 πŸ’¬ 4 πŸ“Œ 2

I agree. Still using camelCase thought because that's just how JavaScript is written. Would feel out of place with other libraries and platform functions. (From reading your comments you seem to agree)

03.02.2025 07:36 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Near the end you write "I’m still not convinced though because could a junior developer understand that more than this?". That is also a purely anecdotal argument, and I disagree with you. I think it's easier to parse and understand that a pseudo class is added to the selector with &:hover.

30.01.2025 14:11 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Svelte in Depth: The $effect.root rune β€” Mat Simon This article explores Svelte’s $effect.root rune, detailing its purpose, usage, and common misconceptions. It covers scenarios where $effect.root is essential, explains its lifecycle considerations, a...

Thank you @matsimon.dev for this great blog post explaining $effect.root in Svelte 5!

www.matsimon.dev/blog/svelte-...

Really cleared up some confusion I had about why $effect.root wouldn't track my changes. πŸ˜€

29.01.2025 22:49 πŸ‘ 11 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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The Trouble with Elon I didn’t set out to become an enemy of the world’s richest man, but I seem to have managed it all the same.

Good read. "The man claims to have principles, but he appears to have only moods and impulses."

23.01.2025 14:23 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Post image

Very interesting new #svelte proposal: https://github.com/sveltejs/svelte/pull/15000

A better, more portable implementation of β€œactions” called β€œattachments”.

18.01.2025 22:11 πŸ‘ 7 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Elon Musk pretending to be one of the best players of Path of Exile in the world, and then live streaming to prove it... just to show everybody that he has absolutely no clue what he's doing and just bought some Chinese account has got to be one of the funniest things this year so far.

14.01.2025 14:19 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Absolutely :) But to be fair, the match with Magnus was *really* close. And it was way really short too. It would be very entertaining to see a format with more games.

14.01.2025 13:39 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Mastodon ist nicht besonders geeignet fΓΌr sowas weil man dann die Instanz angeben muss. Generell ist das mMn der Grund warum Mastodon nie abgehoben hat oder abheben wird. Instanzen haben zu viel Einfluss auf das Netzwerk.

14.01.2025 11:55 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Screenshot of Hans Niemann's Twitter post: "As the #1 Blitz Player on CHESSCOM. I challenge the #2 and #3 players to an OTB Blitz match to decide who the best player in the world is. I am willing to put up anywhere from 1 to 1 million USD. If they are too afraid of the challenge, I expect them to retract all false accusations and issue a formal apology."

Screenshot of Hans Niemann's Twitter post: "As the #1 Blitz Player on CHESSCOM. I challenge the #2 and #3 players to an OTB Blitz match to decide who the best player in the world is. I am willing to put up anywhere from 1 to 1 million USD. If they are too afraid of the challenge, I expect them to retract all false accusations and issue a formal apology."

I love the chess drama.

14.01.2025 11:22 πŸ‘ 4 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

I’m really happy about this. I see way too many people switching to Bluesky because it has not been taken over by a right wing lunatic. But the important thing about Bluesky is not that the company it is controlled by is not insane (yet), but that the network is decentralized!

13.01.2025 21:19 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Ach steht eh ganz am Anfang. Danke :)

12.01.2025 17:57 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Wie war die Fragestellung?

12.01.2025 17:37 πŸ‘ 1 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0
The customLabels.pattern configuration for vscode.

The customLabels.pattern configuration for vscode.

How tabs will be labeled with this configuration.

How tabs will be labeled with this configuration.

In case you missed it, #vscode now has an option for custom labels! The #svelte vscode extension will set this automatically in the future, but until then, you can make these changes to optimize your tab labels in a #sveltekit project.

github.com/sveltejs/lan...

10.01.2025 14:05 πŸ‘ 10 πŸ” 1 πŸ’¬ 0 πŸ“Œ 1
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Svelte in Depth: The createSubscriber() function β€” Mat Simon Learn how the createSubscriber() function in Svelte helps manage reactive values from external sources. Discover which problems it solves, when to use it, and how it works under the hood.

Just published a post about the new createSubscriber() function in #svelte, and how it helps you manage reactive values from external sources.

09.01.2025 15:53 πŸ‘ 31 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0

Funny... I made the exact argument in a Reddit post a few days ago. People constantly complain that there aren't enough svelte jobs, while simultaneously complaining that the team focuses on making Svelte are more reliable framework for big and professional projects. πŸ€·β€β™‚οΈ

09.01.2025 14:46 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

How does that break reactivity?

09.01.2025 14:44 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Same πŸ˜‚

08.01.2025 15:55 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Und kΓΆnnte man kein Gesetz machen, dass das ORF Budget festlegt so dass es nicht einfach so von einer Regierung geΓ€ndert werden kann? Oder ist das auch nur deswegen nicht realistisch weil es so ein politischer Wirbel wΓ€re?

08.01.2025 11:55 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Bzw: warum ist die GIS unabhΓ€ngiger? Kann eine neue Regierung nicht auch einfach die GIS absetzen oder verringern?

08.01.2025 10:19 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0