Meet the new dynamic and small/large viewport units that make responsive layouts more predictable across browsers and devices.

Your CSS Can Do This? (Most Developers Have No Idea)

💡 Introduction
CSS Variables (or custom properties) are an incredible feature of modern web design. They simplify theme management, support dynamic styling, and reduce redundancy.
But here’s the catch — they come with a few weird behaviors that most developers never talk about.
After reading this, you’ll never look at CSS Variables the same way again.

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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. ✨

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Discover 40 creative CSS sliders and carousels with Codepen examples. Learn pure CSS techniques plus top libraries like Swiper and Splide for modern web development.

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.

For years, I wrestled with verbose null checks in PHP — layering isset() guards or ternaries into every array and object assignment. Then, in PHP 7.4, along came the null coalescing assignment operator (??=), and it changed everything. This tiny syntax tweak makes default‑value logic cleaner, safer, and yes—faster. Here’s why I’ve made ??= my go‑to trick for punchier PHP.

Stop Rewriting HTML for Different Screens

One day I was staring at my JavaScript code, fingers hovering over the keyboard, wondering if there’s a cleaner way to handle conditional updates without bloating my logic.

You’ve been there, right? That moment when you’re juggling truthy checks and assignments, and your code starts looking like a tangled mess.

This little screenshot for me represents a turning point in AI.

I did one prompt in Claude Code. One single request and pressed enter and then something magical happened…

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