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Contextual Utility Classes for Color with Custom Properties

In CSS, we have the ability to access currentColor which is tremendously useful. Sadly, we do not have access to anything like currentBackgroundColor, and the color-mod() function is still a ways away.

With that said, I am sure I am not alone when I say I'd like to style some links based on the context, and invert colors when the link is hovered or in focus. With CSS custom properties and a few, simple utility classes, we can … Read article

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Weekly news: Truncating muti-line text, calc() in custom property values, Contextual Alternates

In this week's roundup, WebKit's method for truncating multi-line text gets some love, a note on calculations using custom properties, and a new OpenType feature that prevents typographic logjams.
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Managing Multiple Backgrounds with Custom Properties

One cool thing about CSS custom properties is that they can be a part of a value. Let's say you're using multiple backgrounds to pull off a design. Each background will have its own color, image, repeat, position, etc. It can be verbose!… Read article

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Weekly Platform News: HTML Inspection in Search Console, Global Scope of Scripts, Babel env Adds defaults Query

In this week's look around the world of web platform news, Google Search Console makes it easier to view crawled markup, we learn that custom properties aren't computing hogs, variables defined at the top-level in JavaScript are global to other page scripts, and Babel env now supports the defaults query — plus all of last month's news compiled into a single package for you.… Read article

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Different Approaches for Creating a Staggered Animation

Animating elements, at its most basic, is fairly straightforward. Define the keyframes. Name the animation. Call it on an element.

But sometimes we need something a little more complex to get the right “feel" for the way things move. For example, a sound equalizer might use the same animation on each bar, but they are staggered to give the illusion of being animated independently.… Read article

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Faking env() to Use it Now

There is already an env() function in CSS, but it kinda came out of nowhere as an Apple thing for dealing with "The Notch" but it has made it's way to be a draft spec. The point will be for UAs or authors to declare variables that cannot be changed. Global const for CSS, sorta.… Read article

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Get a CSS Custom Property Value with JavaScript

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Breaking CSS Custom Properties out of :root Might Be a Good Idea

CSS Custom Properties have been a hot topic for a while now, with tons of great articles about them, from great primers on how they work to creative tutorials to do some real magic with them. If you’ve read more than one or two articles on the topic, then I’m sure you’ve noticed that they start by setting up the custom properties on the :root about 99% of the time.

While putting custom properties on the :root is great … Read article

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Do CSS Custom Properties Beat Sass Loops?

I reckon that a lot of our uses of Sass maps can be replaced with CSS Custom properties – but hear me out for a sec.

When designing components we often need to use the same structure of a component but change its background or text color based on a theme. For example, in an alert, we might need a warning style, an error style, and a success style – each of which might be slightly different, like this: … Read article

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CSS Variables + calc() + rgb() = Enforcing High Contrast Colors

As you may know, the recent updates and additions to CSS are extremely powerful. From Flexbox to Grid, and — what we’re concerned about here — Custom Properties (aka CSS variables), all of which make robust and dynamic layouts and interfaces easier than ever while opening up many other possibilities we used to only dream of.

The other day, I was thinking that there must be a way to use Custom Properties to color an element's background while … Read article

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