Let’s look at how to get the user’s mouse position and map it into CSS custom properties: --positionX and --positionY.
We could do this in JavaScript. If we did, we could do things like make make an element …
The other day, Florens Verschelde asked about defining dark mode styles for both a class and a media query, without repeat CSS custom properties declarations. I had run into this issue in the past but hadn’t come up with a …
CSS is yet to have a switch rule or conditional if, aside from the specific nature of @media queries and some deep trickery with CSS custom properties. Let’s have a look at why it would be useful if we …
In my recent “Custom Properties as State” post, one of the things I mentioned was that theoretically, UI libraries, like React and Vue, could automatically map the state they manage over to CSS Custom Properties so we could use that state …
Let’s have a look CSS @keyframes animations, and specifically about how you can pause and otherwise control them. There is a CSS property specifically for it, that can be controlled with JavaScript, but there is plenty of nuance to get …
Here’s a fun idea from James Stanley: a CSS file (that presumably updates daily) containing CSS custom properties for “seasonal” colors (e.g. spring is greens, fall is oranges). You’d then use the values to theme your site, knowing that those …
Custom properties not only enable us to make our code more efficient, but allow us to work some real magic with CSS too. One area where they have huge potential is theming. At Atomic Smash we use Tailwind CSS, …
Back in July 2020, I got an email from James0x57 (I always try to refer to people by their name, but I think I get the sense they prefer to go by screen name) that says:
…The entire world of
Una Kravetz digs into how Chrome now allows you to declare CSS custom properties directly from CSS with more information than just a string. …
I was working on a thing the other day that needed a visible timer. There was UI precedent for this type of timer on the project. People didn’t want to see numbers ticking downward; it was more ideal to see …
Lea Verou digging up the CSS trickery classic and applying it to clip the backgrounds of some code blocks:
…The main idea is simple: You write your main rule using CSS variables, and then use
:nth-of-*()rules to set these
