This is the third article in a series about the CSS shape() function. We’ve covered drawing lines and arcs in previous articles and, this time, we look specifically at the curve command and how to use it for drawing complex shapes.
The contrast-color() function doesn’t check color contrast, but rather it outright resolves to either black or white (whichever one contrasts the most with your chosen color). Safari Technology Preview recently implemented it and we explore its possible uses in this article.
The State of CSS 2025 Survey dropped a few days ago, and besides anticipating the results, it’s exciting to see a lot of the new things shipped to CSS reflected in the questions.
So, how can you take dialogue box design beyond the generic look of frameworks and templates? How can you style them to reflect a brand’s visual identity and help to tell its stories? Here’s how I do it in CSS using ::backdrop, backdrop-filter, and animations.
This is the second part of a series that dives deep into the CSS shape() command, continuing with a more detailed look at the arc command.
The reading-flow and reading-order proposed CSS properties are designed to specify the source order of HTML elements in the DOM tree, or in simpler terms, how accessibility tools deduce the order of elements. You’d use them to make the focus order of focusable elements match the visual order, as outlined in the Web Content Accessibility Guidelines (WCAG 2.2).
Chrome 137 introduces the newly-specced if() function. Una Kravets posted a nice video overview and Temani Afif writes about it as well.
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Firefox 139 includes an update where content inside a <details> element is included in an in-page search. Previously, that content was ignored when the element was collapsed.
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Sara Soueidan evaluated the accessibility of CSS Carousels — which are billed as “accessible by default” — and I need some time to wrap my head around her detailed results.
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Straight from the W3C Technical Architecture Group: “[W]e see an urgency to have a strict timeline for the removal of third-party cookies.”
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Timeless CSS gems
Dive deep into CSS features and concepts
Properties, selectors, rules, and functions!
ul li { transform: translateX(calc(sibling-index() * 10px)); }
.scroll-container { scroll-marker-group: before; }
.scroll-container::scroll-marker-group { /* ... */ }
.element::scroll-marker { content: ""; }
.carousel::scroll-button(right) { content: "⮕"; }
.element { text-box-trim: trim-both; }
.element { margin-trim: block-end; }
@font-feature-values Noble Company {
@stylistic {
curly: 1; /* Sets ss01 on */
}
}
.element { width: rem(10px, 4px); }
.element { width: round(10.4px, 1px); }
.element { width: mod(10px, 4px); }
.element { color: oklch(70% 0.15 240); }
.element { width: calc-size(auto, size); }
.element { width: clamp(200px, 50%, 800px); }