For quite a while now, the CSS spec has included a lot of really useful mathematical functions, such as trigonometric functions (sin(), cos(), tan(), asin(), acos(), atan(), atan2()), exponential functions (…
Let’s build a fully functioning and settable “analog” clock with CSS custom properties and the calc() function. Then we’ll convert it into a “digital” clock as well. All this with no JavaScript!…
Normally, a project will have a set of pre-determined font sizes, usually as variables named in such a way that seeks some semblance of order and consistency. Any project of considerable size can use something like that. There are always …
PPK laid out an interesting situation in “Two options for using custom properties” where he and Stefan Judis had two different approaches for doing the same thing with custom properties. In one approach, hover and focus styles for a …
Jonathan Neal tweeted a heck of a little CSS trick the other day, putting JSON inside CSS and plucking it out with JavaScript. Valid values for custom properties are quite liberal! So this looks for a CSS rule (e.g. a …
I love to make CSS do stuff it shouldn’t. It’s the type of problem-solving brain training you’d get building a calculator in Minecraft, except you probably won’t get a job working with Minecraft Redstone no matter how good you …
Geoff shared this idea of a checkerboard where the tiles disappear one-by-one to reveal an image. In it, an element has a background image, then a CSS Grid layout holds the “tiles” that go from a filled background color to …
Uh, what’s @property? It’s a new CSS feature! It gives you superpowers. No joke, there is stuff that @property can do that unlocks things in CSS we’ve never been able to do before.
While everything about @property is exciting, …
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 …
