We put it to the test and it turns out Sass can replace JavaScript, at least when it comes to low-level logic and puzzle behavior. With nothing but maps, mixins, functions, and a whole lot of math, we managed to bring our Tangram puzzle to life, no JavaScript required.
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The HTML popover attribute transforms elements into top-layer elements that can be opened and closed with a button or JavaScript. Popovers can be dismissed a number of ways, but there is no option to auto-close them. Preethi has a technique you can use.
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.
.triangle { clip-path: shape(from 50% 0%, line by 50% 100%, hline to 0%, line to 50% 0%, close); }
ul li { width: calc(100% / sibling-count()); }
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 { width: calc-size(auto, size); }