Josh Comeau's blog
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Friendly articles and tutorials for front-end web developers. ❤️
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Getting Started with Anchor Positioning
For decades, one of the most notoriously-challenging problems on the web has been sticking one element to another element, for things like tooltips and nested menus. The CSSWG has decided to provide a first-class solution to this problem, and it’s pretty friggin’ cool! In this tutorial, I’ll share…
CSS vs. JavaScript
There are a bunch of JavaScript animation libraries out there, and you might have wondered whether there’s a performance cost compared to traditional CSS transitions and keyframe animations. In this blog post, we’ll compare the same animation across several different strategies and see the…
Scroll-Driven Animations
The new Animation Timeline API allows us to create dynamic scroll animations without any JavaScript! It’s honestly a very lovely API, and in this blog post, we’ll explore some of the super cool things we can do with it.
Squash and Stretch
Have you ever heard of Disney’s 12 Basic Principles of Animation? In this tutorial, we’ll explore how we can use the very first principle to create SVG micro-interactions that feel way more natural and believable. It’s one of those small things that has a big impact.
Sneaky Header Blocker Trick
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…
Sprites on the Web
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…
Brand New Layouts with CSS Subgrid
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…
Springs and Bounces in Native CSS
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…
The Big Gotcha With @starting-style
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
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…
An Interactive Guide to SVG Paths
SVG gives us many different primitives to work with, but by far the most powerful is the element. Unfortunately, it’s also the most inscrutable, with its compact Regex-style syntax. In this tutorial, we’ll demystify this infamous element and see some of the cool things we can do with it!
A Friendly Introduction to SVG
SVGs are one of the most remarkable technologies we have access to on the web. They’re first-class citizens, fully addressable with CSS and JavaScript. In this tutorial, I’ll cover all of the most important fundamentals, and show you some of the ridiculously-cool things we can do with this…
Partial Keyframes
CSS Keyframe animations are so much more powerful than most developers realize. In this tutorial, I’ll show you something that completely blew my mind, a technique that makes our keyframe animations so much more reusable and dynamic! 🤯
The Height Enigma
One of the most perplexing and befuddling things in CSS for me, for many years, was the behaviour of percentage-based heights. Sometimes, seemingly at random, setting height: 100% would have no effect at all. When I finally figured out what was going on, it was like a puzzle piece snapping into…
The Post-Developer Era
When OpenAI released GPT-4 back in March 2023, they kickstarted the AI revolution. The consensus online was that front-end development jobs would be totally eliminated within a year or two.Well, it’s been more than two years since then, and I thought it was worth revisiting some of those early…
A Million Little Secrets
I spent the past few weeks packing as many easter eggs as I could into my latest project, and in this blog post, I want to dig into some of the more interesting details! If you’re interested in animations/interactions, you’ll want to check this one out; I share a bunch of my favourite secrets and…
Container Queries Unleashed
Container queries expand the universe of designs that can be implemented, giving us whole new superpowers. Now that container queries are broadly available, I think it’s time we start exploring this potential! In this post, I’ll share the “killer pattern” I can’t stop using in my work, and explore…
Next-level frosted glass with backdrop-filter
Glassy headers have become a core part of the “slick startup” UI toolkit, but they’re all missing that final 10% that really makes it shine. In this tutorial, you’ll learn how to create the most realistic lush frosted glass anywhere on the internet.
A Framework for Evaluating Browser Support
Lots of exciting new features have been landing in CSS recently, and it can be tough trying to figure out if they’re safe to use or not. We might know that a feature is available for 92% of users, but is that sufficient? Where do we draw the line? In this blog post, I’ll share the framework I use…
A Friendly Introduction to Container Queries
It’s been a couple of years since container queries started landing in browsers… so why isn’t anyone using them? It turns out that container queries are kinda tricky; they’re not as straightforward as media queries. In this tutorial, we’ll break it all down and make sense of them, so that you can…
In the directory since 25 Sept 2026 · last checked 25 Sept 2026 · RSS