Uploaded August 2026 | Updated September 2026, 2 weeks ago
š Start writing CSS with confidence: https://thecascade.dev/courses/css-demystified/?utm_source=youtube&utm_medium=social&utm_campaign=regular-video
Demo from the start of this video: codepen.io/editor/kevinpowell/pen/019fd889-9233-7d4c-83e2-38cdcfd90596
Open Props: https://open-props.style/
Ahmad Shadeed's post: ishadeed.com/article/conditional-border-radius
After recently stumbling across Open Prop's conditional border-radius, which linked over to Ahmad Shadeed's post on them, I had to make a video too (even if his post was from 5 years ago!).
I took a different approach with this one, would love to know what you think of it.
ā Keep up to date with everything I'm up to kevinpowell.co/newsletter
š¬ Come hang out with other devs in my Discord Community discord.gg/nTYCvrK
ā Are you a beginner? HTML & CSS for absolute beginners is for you: learn.kevinpowell.co
š Start writing CSS with confidence with CSS Demystified: cssdemystified.com
š Already mastered CSS? Check out my advanced course, Beyond CSS: https://www.beyondcss.dev/
---
Help support my channel
šØāš Get a course: kevinpowell.co/courses
š Buy a shirt: cottonbureau.com/people/kevin-powell
š Support me on Patreon: patreon.com/kevinpowell or through YT memberships: youtube.com/@KevinPowell/join
---
š§āš» My editors:
In most videos, Iām using CodePen these days: codepen.io - with High Contrast Dark theme and the font Commit Mono
And if not CodePen, then Iām probably using Zed: https://zed.dev/ with the theme Ayu Dark, and the font ZedMono
In older videos, I was using VS Code - code.visualstudio.com with the theme One Dark Pro Var, and the font Cascadia
---
ā Timestamps:
00:00 - Intro
00:18 - Simple border radius
01:13 - Making the border-radius smaller as the element gets bigger
02:16 - Clamping the values to prevent it getting too big
02:40 - Making the middle value really big (or small)
03:06 - Making it snap from the small value to the big value
03:44 - Switching to container query units
---
I'm on some other places on the internet too!
If you'd like a behind the scenes and previews of what's coming up on my YouTube channel:
Bluesky: https://bsky.app/profile/kevinpowell.co
Codepen: codepen.io/kevinpowell
Github: github.com/kevin-powell
---
And whatever you do, don't forget to keep on making your corner of the internet just a little bit more awesome!
#css
š Start writing CSS with confidence: https://thecascade.dev/courses/css-demystified/?utm_source=youtube&utm_medium=social&utm_campaign=regular-video
Demo from the start of this video: codepen.io/editor/kevinpowell/pen/019fd889-9233-7d4c-83e2-38cdcfd90596
Open Props: https://open-props.style/
Ahmad Shadeed's post: ishadeed.com/article/conditional-border-radius
After recently stumbling across Open Prop's conditional border-radius, which linked over to Ahmad Shadeed's post on them, I had to make a video too (even if his post was from 5 years ago!).
I took a different approach with this one, would love to know what you think of it.
ā Keep up to date with everything I'm up to kevinpowell.co/newsletter
š¬ Come hang out with other devs in my Discord Community discord.gg/nTYCvrK
ā Are you a beginner? HTML & CSS for absolute beginners is for you: learn.kevinpowell.co
š Start writing CSS with confidence with CSS Demystified: cssdemystified.com
š Already mastered CSS? Check out my advanced course, Beyond CSS: https://www.beyondcss.dev/
---
Help support my channel
šØāš Get a course: kevinpowell.co/courses
š Buy a shirt: cottonbureau.com/people/kevin-powell
š Support me on Patreon: patreon.com/kevinpowell or through YT memberships: youtube.com/@KevinPowell/join
---
š§āš» My editors:
In most videos, Iām using CodePen these days: codepen.io - with High Contrast Dark theme and the font Commit Mono
And if not CodePen, then Iām probably using Zed: https://zed.dev/ with the theme Ayu Dark, and the font ZedMono
In older videos, I was using VS Code - code.visualstudio.com with the theme One Dark Pro Var, and the font Cascadia
---
ā Timestamps:
00:00 - Intro
00:18 - Simple border radius
01:13 - Making the border-radius smaller as the element gets bigger
02:16 - Clamping the values to prevent it getting too big
02:40 - Making the middle value really big (or small)
03:06 - Making it snap from the small value to the big value
03:44 - Switching to container query units
---
I'm on some other places on the internet too!
If you'd like a behind the scenes and previews of what's coming up on my YouTube channel:
Bluesky: https://bsky.app/profile/kevinpowell.co
Codepen: codepen.io/kevinpowell
Github: github.com/kevin-powell
---
And whatever you do, don't forget to keep on making your corner of the internet just a little bit more awesome!
#css
