"UZUMAKI" by Alansdead

codepen.io/Alansdead/pe...

Artemis 2 Integrity - scroll to reach the moon An animation-timeline:scroll based animation to simulate the Artemis Integrity crewship approaching the moon. Note - this is NOT meant to be a realist...

A simple css scroll based animation to help celebrate the Artemis 2 crew reaching the furthest point mankind has travelled from earth 🚀

See the full demo on @codepen.io

codepen.io/cbolson/full...

#artemis

The April CodePen Challenge is on!
This month we're working with Code Words

codepen.io/challenges/2...

Thanks @MongoDB for sponsoring: srv.buysellads.com/ads/long/x/T...

Any DNS that supports CNAME-at-the-root, ALIAS, or ANAME records mean you can point that domain at a deployed Pen and rock'n'roll you have an Apex domain using CodePen Hosting.

10 Cool CodePen Demos (March 2026) YouTube video by Alvaro Montoro

For the past 3+ years, I have been posting a monthly "newsletter" with some cool CodePen demos published during that month. alvaromontoro.com/10-cool-code...

For a change, I recorded a video talking about them and showing why I think they are cool: www.youtube.com/watch?v=KW91...

Who found the easter egg in my CSS-only Dino game? 🥚

A "rocket mode" to fly above everything! 👀

Give it a try 👇

Ripple effect in pure CSS using a combination of filters, blurs, contrast and blend modes.

CodePen: codepen.io/editor/NikxD...

Chrome & Safari only for now, Firefox does not want to animate the custom property correctly :)

The Great CSS Expansion CSS now does what Floating UI, GSAP ScrollTrigger, Framer Motion, and react-select used to require JavaScript for. Here is exactly how much that saves, why these libraries were painful beyond their si...

this is a great CSS read.
blog.gitbutler.com/the-great-cs...

not to mention syntax improvements; nested CSS, CSS vars and mixing colors, et al.

Turned my ASCII text scramble hover effect into a full-screen playground. Radial waves expand from the cursor, with a GUI to tweak everything live. Probably useless. Fun to play with though. Bonus: you get to read some Lovecraft.

Codepen: codepen.io/erevan/full/qEaYQPw

To celebrate the launch of Artemis II 🚀, I put together a #cssonly scroll-driven animation.

Powered by animation-timeline: scroll — no JavaScript, just modern CSS.

Still WIP, but already a fun experiment.

Full demo on @codepen.io ✨
codepen.io/cbolson/full...

#artemis

A NASA moon mission launched for the first time in my lifetime yesterday so naturally I stayed up and built the whole SLS rocket in CSS.

All CSS Art - no images, no SVGs, no JS. Just one <div>, a few keyframe animations, an unreasonable number of CSS linear-gradients.

A crap-ton of shape() inspiration from none other than @css-only.dev to help burn your Thursday.

css-tricks.com/complex-css-...

"Jelly text (Variable Font Physics)" by mike-at-redspace

codepen.io/mike-at-reds...

(Feels like you could recreate some of the great design at follow.art with variable fonts!)

CodePen now has a Lightning CSS Block. It's a "syntax lowerer" (like Babel is for JS, but for CSS). It respects your browserslist! It's a bundler! It's a minifier!

There is "Real" Tailwind (v4) processing in the 2.0 editor. No more faking it. You can straight up look at the output and see what it's doing.

I've been doing some experimentation with a dynamic floating label that changes to reflect the current visible section using intersection observer. Here's a minimal demo: codepen.io/editor/hexag...

If you love the Classic @codepen.io Editor and want that same feel in the 2.0 Editor, here are some quick tweaks to get you back into familiar territory.

Try the 2.0 Editor: codepen.io/editor/pen

It's the final week of the March CodePen Challenge!
This week, we're working with Opposite Directions ⬆️⬇️
codepen.io/challenges/2...

what if we did it to each RGB channel with a bit offset??? A bit like cube-helix but "edgy" :D codepen.io/editor/meoda...

An extension of this from yesterday, pulling from an old bag of tricks. This one adds a second geometry "on top" of the original and renders an additively blended volumetric raymarch from the rear of the object to the front, lending the object a sense of depth and magic.

CSS Get OS's --scrollbar-size int on :root ...

You can get the OS scrollbar gutter width as an integer in a --CSS-var on :root
codepen.io/propjockey/p...

(to have a gutter at all you'll have to, on mac, turn on scrollbars to "always", etc, and refresh to ever see it non-zero)

But it's bugged in Safari:
bugs.webkit.org/show_bug.cgi...

Did you know you can take an icosahedron, unfold it, flatten it into a 2D shape, and then 'twist' it into a tetrahelix?!

I didn’t know either. But once I discovered it, I had to make a demo, in pure #CSS of course.

Live on @codepen.io: codepen.io/editor/amit_...

I've noticed both text-wrap: balance and pretty are being included in a lot of resets these days.

Deploy a Pen to a Custom Subdomain YouTube video by Chris Coyier

You can take any 2.0 Pen:
codepen.io/editor/team/...

And deploy it:
tight-hill-cattle.codepen.app

Then map it to a subdomain*:
subscribe.shoptalkshow.com

Three-minute video on how here:
www.youtube.com/watch?v=nzeW...

And docs:
blog.codepen.io/docs/pens/de...

*apex domains coming soon.

CodePen TV 📺 100% Pure CSS 📺📺📺📺📺📺📺📺📺📺📺📺📺📺 🚫 - 100% No Images ☕ - Definitely no JavaScript 🤖 - Absolutely no AI 😇 - Only the purest HTML and completely vanilla fresh CSS!! 📺...

To celebrate something-or-other, I created a retro CRT using only vanilla CSS!

📺 codepen.io/ivorjetski/p...

No images. No JavaScript. No SASS.

Fully turn-off-and-on-able!

Also a documentary about the making of it: www.youtube.com/watch?v=wdNH...

@CodePen #css #cssart #cssonly #frontend

You can just pluck one-off Web Awesome components to use as you please.

See how easy:

Shamrock Shake - Single Div CSS Art Celebrating the truly iconic symbol of St. Patrick's Day. - the McDonald's Shamrock Shake....

The iconic modern symbol of St. Patrick's Day

It's been a minute since I made one of these single-div CSS art pieces, I'm a bit out of practice, but with so much of my work now sending the code off to AI to assemble, it's a joy to return to crafting CSS Art by hand.

codepen.io/robleto/coll...

A person is checking off a todo list on a tablet with a stylus. Two more checklist items to go!

Our Front-End Opposites challenge continues!
This week, we're working with True & False
codepen.io/challenges/2...

anchor ray 3 spotlights - final This would not have been possible without seeing Temani Afif’s mind-blowing CSS-only graph theory. https://codepen.io/t_afif/pen/YPWMmOP...

After finally understanding @css-only.dev's demo for calculating the shortest paths between points, I was able to create this little spotlight effect. Pretty happy with the result!

codepen.io/enbee81/deta...

una.im | Automated Accessible Text with contrast-color() Let the browser pick the most readable text color for any background with this new CSS function.

contrast-color() is landing in Chrome 147, making it Baseline Newly Available in all modern browsers

It takes any color value and returns either black or white: whichever provides the highest contrast against the input

Works great with generated colors, state changes, etc.

una.im/contrast-color