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site iconJosh ComeauModify

A frontend web developer who publishes tutorials and articles about topics like React, CSS, JavaScript, animation and performance.
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Sneaky Header Blocker Trick

2026-03-23 20:00:00

There is a lil’ UI detail on this blog. Most people don’t even notice it, but the ones who do often reach out, asking how on earth it works. It feels like it defies the rules of CSS! In this blog post, I’ll break down the surprisingly-straightforward implementation so you can start using this trick yourself.



Sprites on the Web

2026-02-23 19:00:00

In game development, it’s common to use spritesheets for animation, but this technique isn’t as widely used on the web these days. Which is a shame, because we can do some pretty cool stuff with sprites! In this post, we’ll share the niche CSS function you can use to leverage this technique, and explore some of the potential use cases.



Brand New Layouts with CSS Subgrid

2025-11-25 20:00:00

Subgrid allows us to extend a grid template down through the DOM tree, so that deeply-nested elements can participate in the same grid layout. At first glance, I thought this would be a helpful convenience, but it turns out that it’s so much more. Subgrid unlocks exciting new layout possibilities, stuff we couldn’t do until now. ✨



Springs and Bounces in Native CSS

2025-10-28 20:00:00

The “linear()” timing function is a game-changer; it allows us to model physics-based motion right in vanilla CSS! That said, there are some limitations and quirks to be aware of. I’ve been experimenting with this API for a while now, and in this post, I’ll share all of the tips and tricks I’ve learned for using it effectively. ✨



The Big Gotcha With @starting-style

2025-09-22 19:30:00

CSS has been on fire lately, with tons of great new features. @starting-style is an interesting one; it allows us to use CSS transitions for enter animations, something previously reserved for CSS keyframe animations. But is the juice worth the squeeze?



Color Shifting in CSS

2025-09-08 21:30:00

A little while ago, I was trying to animate an element’s background color, so that it cycled through the rainbow. Seems easy, but it turns out, browsers have a surprisingly big limitation when it comes to color processing! In this tutorial, we’ll dig into the issue, and I’ll share a couple of strategies you can use to work around this limitation.