The Screen Wake Lock API rules. If you need your app to keep the screen on, this API is comparatively simple to use and works in every browser.
Peter Kröner
@sir_pepe@mastodon.social
mastodon
4.6.0-nightly.2026-04-17
Developer ✨ edutainment ✨ Shitposting about #javascript and 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 sirpepe.bsky.social on bluesky
0
Followers
0
Following
Joined April 20, 2017
Posts
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
@sir_pepe@mastodon.social
·
Apr 09, 2026
7
0
5
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
@sir_pepe@mastodon.social
·
Mar 27, 2026
Wait, what? There is a way to disable certain web component features via a static class field? Just randomly stumbled upon this in the specs. Can't find much documentation, but it works in Chrome and Firefox at least.
👉 https://html.spec.whatwg.org/multipage/custom-elements.html#dom-customelementregistry-define
21
0
8
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
@sir_pepe@mastodon.social
·
Mar 25, 2026
3
0
3
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
@sir_pepe@mastodon.social
·
Mar 20, 2026
Moar @workingdraft@podcasts.social - diesmal mit @deadparrot@mastodon.social und @muhdiekuh@ruhr.social zu React und TypeScript 🔥
3
0
1
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
@sir_pepe@mastodon.social
·
Mar 19, 2026
Aufnahme @workingdraft@podcasts.social mit @Schepp@mastodon.social - es gibt wieder einen Browser-News-Roundup!
6
1
1
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
@sir_pepe@mastodon.social
·
Feb 24, 2026
🤢 Behold! The most broken #CSS that still sort of works!
I wondered why CSS.supports("filter", "blur(") returned true. Well, it turns out that a standard-conforming CSS parser does not distinguish between } and EOF or between ) and EOF. And filter function arguments are all optional. So ending the stylesheet with "blur(" has the same effect as "blur(0px)" with all braces properly closed.
The whole story: @sir_pepe@mastodon.social
In Action: https://codepen.io/SirPepe/pen/ByLBGrJ?editors=0100
CSS is awesome.
11
0
7
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
@sir_pepe@mastodon.social
·
Jan 22, 2026
🙋 Ladies, gents, and dear non-binary pals: I could really use some work. Here's what I do best:
- Workshops: entertaining deep dives into JS, TS, web components, frontend performance, general vanilla webdev
- Development: performance-oriented vanilla frontends & refactoring of impenetrable legacy dumpster fires (esp. React, CSS)
- DevRel: yapping & writing about anything related to web frontends
- General coaching & code review for frontend technologies
Get in touch at peter@peterkroener.de!
13
0
36
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
@sir_pepe@mastodon.social
·
Jan 19, 2026
The Incredible Overcomplexity of the Shadcn Radio Button
👉 https://paulmakeswebsites.com/writing/shadcn-radio-button/
100
0
71
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
@sir_pepe@mastodon.social
·
Jul 08, 2025
TIL: you don't need canIUse.com or ChatGPT,
document.implementation.hasFeature() has you covered!
Specs: https://dom.spec.whatwg.org/#dom-domimplementation-hasfeature 🤡
16
0
13
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
Peter Kröner
@sir_pepe@mastodon.social
Developer ✨ edutainment ✨ Shitposting about # javascript and 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 sirpepe.bsky.social on bluesky
mastodon.social
@sir_pepe@mastodon.social
·
Oct 01, 2024
Gestern Aufnahme von @workingdraft@podcasts.social mit @muhdiekuh@ruhr.social zum Speaker-Dasein auf Konferenzen. Es ist laaaaaang geworden. Release ist am am 29. Oktober 🎙️
7
0
2