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Peter Kröner

@sirpepe.bsky.social

130 followers 100 following 650 posts

Shitposting about vanilla #webdev. Also there's cat pictures and bursts of travel. Reading web technology specs and doing training/consulting on said web technologies. Also at @[email protected]

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Peter Kröner @sirpepe.bsky.social · Jan 23

Öffentliche Erklärbär-Termine 1. Halbjahr 2025

www.peterkroener.de/oeffentliche...

Peter Kröner @sirpepe.bsky.social · 22h

"Cash only" ofc

Peter Kröner @sirpepe.bsky.social · 3d

Trapped in Lower Bavaria, send help

Phone connectivity status indicating mere traces of 2G

Peter Kröner @sirpepe.bsky.social · 5d

I'm sure it makes sense to her #cats

Ragdoll cat has wedged herself under a pillow

Peter Kröner @sirpepe.bsky.social · 6d

The plan was to just modularize language loading in Code.Movie's online playground. Now there is basically no pixel where it was before 🫠

Peter Kröner @sirpepe.bsky.social · 7d

#webdev #javascript

Tuxedo Winnie The Pooh Meme
Panel 1: Installing modules
Panel 2: Rolling the dependency dice

Peter Kröner @sirpepe.bsky.social · 7d

Low-key hating the fact that #TypeScript does indeed type check the arguments to Array.prototype.includes(), Set.prototype.has() and the like.

const things = [1, "a", false];

// (╯°□°)╯︵ ┻━┻
if (things.includes(null)) {
}

Peter Kröner @sirpepe.bsky.social · 7d

Joke's on me: the conference has 4 AI tracks, one for Blockchain (!) and bunch of backend/culture stuff. Nothing for straight up JS 🤡

Peter Kröner @sirpepe.bsky.social · 7d

I am apparently going full joker for this next round of #webdev and #javascript conference CfPs.

Extreme Rules Lawyering with the ECMAScript Specifications

Nerds all over the galaxy agree: TECHNICALLY correct is the best kind of correct! So why not mine the ECMAScript specifications for some technically valid JavaScript programs that “work”, but only by exploiting a wide variety of obscure semantic loopholes on the way? This talk goes far beyond mere syntactical obfuscation and explores the absolute fringes of JavaScript—for fun and for very, very little profit. Let us summon forbidden objects, unearth unholy functions that are not meant to be developer-accessible, and abuse features that TC39 would REALLY like to sweep under the rug.

Anybody can follow “best practices” and write “readable code”, so how about learning something actually new and unique? This session will instantly turn you into a living and breathing JavaScript infohazard, uniquely able to conjure up valid JavaScript programs that even ChatGPT could not hallucinate.

Reposted by Peter Kröner

gourd chorus @jcoglan.com · 7d

adding "genuinely concerned this is a cognitohazard" to my list of reasons for avoiding AI tools

Reposted by Peter Kröner

Peter Kröner @sirpepe.bsky.social · 8d

The quick and dirty #PWA that serves as my timer app for talks is 260 LOC JS (excluding the auto-generated service worker). This is simultaneously not much and quite a lot. But it would be SO MUCH MORE without the Temporal and Intl APIs! Truly game-changing additions to #JavaScript!

Peter Kröner @sirpepe.bsky.social · 8d

💩 {
transform: skewY(20deg) skewX(-30deg) rotate(30deg);
}

www.w3.org/press-releas...

The World Wide Web Consortium (W3C) adopts a new logo to signal positive changes

W3C is rolling out a new logo, following W3C’s formation in 2023 as a non-profit, public-interest organization, and the recent release of strategic objectives to support W3C’s roadmap.

Peter Kröner @sirpepe.bsky.social · 8d

The quick and dirty #PWA that serves as my timer app for talks is 260 LOC JS (excluding the auto-generated service worker). This is simultaneously not much and quite a lot. But it would be SO MUCH MORE without the Temporal and Intl APIs! Truly game-changing additions to #JavaScript!

Peter Kröner @sirpepe.bsky.social · 8d

#webdev

Distracted boyfriend meme: the focus is distracted away from the web app and to the devtools panel.

Peter Kröner @sirpepe.bsky.social · 8d

#rip

Peter Kröner @sirpepe.bsky.social · 8d

I need a derogatory term for moderately unhinged LLM enthusiasts that does not _immediately_ warrant challenging me to a duel. Cogsucker and botlicker are just too spicy for some use cases. Is there any established, but only mildly offensive term for that sort of guy?

Peter Kröner @sirpepe.bsky.social · 8d

a bald man wearing glasses is making a funny face while sitting in front of a wall .

ALT: a bald man wearing glasses is making a funny face while sitting in front of a wall .

media.tenor.com

Reposted by Peter Kröner

Peter Kröner @sirpepe.bsky.social · 9d

Started to add dashes to the names of all the custom events that I make up. This is not strictly required, but like with custom elements, it removes the risk of collision with new standards and makes custom and built-in events easy to tell apart.

#webdev #JavaScript #webcomponents

JavaScript class method definition:

@listen("click", "button[data-value]")
#handleQuickPick(evt) {
this.dispatchEvent(
Object.assign(new Event("gutter-editor-pick"), {
value: evt.target.dataset.value,
}),
);
}

Peter Kröner @sirpepe.bsky.social · 9d

🤡 The so-called "International _JavaScript_ Conference" sports a track for Angular and a track for React.

Also there's a track for AI Devtools, one for GenAI & Agents (not to be confused with "GenAI and LLMs", which is its own separate track) and also AI Strategy and AI Governance of course.

Yeah.

Peter Kröner @sirpepe.bsky.social · 9d

Even more podcasting for @workingdraft.de! This time with @deadparrot.dev about the latest developments in and around #typescript

Peter Kröner @sirpepe.bsky.social · 9d

Idly fact-checking MDN (as you do) yields more superb error messages: "cannot directly construct builtin %TypedArray%"

Browsers are so bad at this. This is FF, but Chrome's "Abstract class TypedArray not directly constructable" is not better.

#webdev #JavaScript

Firefox reporting "Uncaught TypeError: cannot directly construct builtin %TypedArray%" when I try to coax a naked TypedArray into existence (which is supposed to be impossible)

Peter Kröner @sirpepe.bsky.social · 9d

#mood

Short-haired red cat looking somewhere between extremely tied and intoxicated

Peter Kröner @sirpepe.bsky.social · 9d

Started to add dashes to the names of all the custom events that I make up. This is not strictly required, but like with custom elements, it removes the risk of collision with new standards and makes custom and built-in events easy to tell apart.

#webdev #JavaScript #webcomponents

JavaScript class method definition:

@listen("click", "button[data-value]")
#handleQuickPick(evt) {
this.dispatchEvent(
Object.assign(new Event("gutter-editor-pick"), {
value: evt.target.dataset.value,
}),
);
}

Peter Kröner @sirpepe.bsky.social · 9d

It's true: if you DIY your web #frontend you miss out on numerous features! Like supply chain attacks, IP laundering via stochastic parrot, and, lately, simping for war criminals. But, y'know, tradeoffs! 🤡

#webdev #JavaScript

nitter.net/rauchg/statu...

Reposted by Peter Kröner

Peter Kröner @sirpepe.bsky.social · 10d

Current status:

#webdev #javascript

Fake O'Reilly book cover "Essential Changing Stuff and Seeing What Happens"

Peter Kröner @sirpepe.bsky.social · 10d

Current status:

#webdev #javascript

Fake O'Reilly book cover "Essential Changing Stuff and Seeing What Happens"