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Peter Kröner

@sirpepe.bsky.social

130 followers 100 following 660 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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Reposted by Peter Kröner

Ben Schwarz @benschwarz.bsky.social · 19h

According to HTTP Archive, Next.js sites see the **worst** Core Web Vitals performance when compared to other popular frameworks

httparchive.org/reports/tech...

Screenshot from https://httparchive.org/reports/techreport/tech?tech=ALL,Next.js,Ruby+on+Rails,Astro,SvelteKit,Svelte,React,VitePress&geo=ALL&rank=ALL&page=1

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Peter Kröner @sirpepe.bsky.social · 16h

Required hardware for long, grueling #typescript workshops: a basic CO2 monitor. Keeps everyone awake and sharp!

A battered, basic CO2 monitor reading 456 ppm

Reposted by Peter Kröner

c't <webdev> @ctwebdev.bsky.social · 22d

"5 useful JS APIs that you've never used": Peter Kröner (bsky.app/profile/did:...) aims to drag a few unknown JavaScript features into the limelight and help developers solve some of the more esoteric challenges that can crop up in web development.

full agenda: ct-webdev.com/agenda-2025/ #ctwd25

bsky.app

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Reposted by Peter Kröner

Peter Kröner @sirpepe.bsky.social · 16d

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...

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Peter Kröner @sirpepe.bsky.social · 1d

... and we immediately get sidetracked with solving actual production problems via less-known #javascript features. As usual!

Peter Kröner @sirpepe.bsky.social · 1d

This week's workshop comes without travel blogging because it's not at the other side of the country, for a change!

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Reposted by Peter Kröner

Peter Kröner @sirpepe.bsky.social · 2d

#React

elopers: "you can't expect mere mortal developers to deal with the complicated DOM API"

Also React

elopers, reading react.dev/reference/re...: "this is fine"

🤡

#webdev #javascript

useEffectEvent – React

The library for web and native user interfaces

react.dev

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Reposted by Peter Kröner

Peter Kröner @sirpepe.bsky.social · 3d

The only real downside of oklch() is that you first have to beat everyone around you into submission #css #webdev

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Peter Kröner @sirpepe.bsky.social · 2d

Somebody should build a fake react docs generator, like this one for git: git-man-page-generator.lokaltog.net

Git man page generator

Create an infinite amount of straightforward and readable git manual pages.

git-man-page-generator.lokaltog.net

Peter Kröner @sirpepe.bsky.social · 2d

#React

elopers: "you can't expect mere mortal developers to deal with the complicated DOM API"

Also React

elopers, reading react.dev/reference/re...: "this is fine"

🤡

#webdev #javascript

useEffectEvent – React

The library for web and native user interfaces

react.dev

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Peter Kröner @sirpepe.bsky.social · 3d

The only real downside of oklch() is that you first have to beat everyone around you into submission #css #webdev

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Peter Kröner @sirpepe.bsky.social · 3d

Via haunted.computer/@xero/115363...

Diffie Hellman's Key Exchange, but it's a jar of mayonnaise

Peter Kröner @sirpepe.bsky.social · 5d

Monsieur now has only three teeth left, but is tripping on some very fun painkillers #caturday

Ragdoll cat loafing on a blanket, looking slightly confused

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Peter Kröner @sirpepe.bsky.social · 5d

Yep. The browser still absolutely owns tho.

Peter Kröner @sirpepe.bsky.social · 6d

That's more like it!

Peter Kröner @sirpepe.bsky.social · 8d

"Cash only" ofc

Peter Kröner @sirpepe.bsky.social · 10d

Trapped in Lower Bavaria, send help

Phone connectivity status indicating mere traces of 2G

Peter Kröner @sirpepe.bsky.social · 13d

I'm sure it makes sense to her #cats

Ragdoll cat has wedged herself under a pillow

Peter Kröner @sirpepe.bsky.social · 13d

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 · 14d

#webdev #javascript

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

Peter Kröner @sirpepe.bsky.social · 14d

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 · 14d

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 · 14d

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.

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Reposted by Peter Kröner

[foreign Object] @jcoglan.com · 14d

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

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Reposted by Peter Kröner

Peter Kröner @sirpepe.bsky.social · 15d

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!

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