A rather geeky/technical weblog, est. 2001, by Bramus
Michael Scharnagl: I am currently building a book section for this site and thought it would be cool to show the books in 3D and also to make it visible how many pages a book has. In this article I would like to show you how to use CSS custom properties to adapt the thickness …
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Mads Stoumann, writing for CSS-Tricks, starts off with a simple idea: set a Custom Property to either playing or paused to control animation-play-state. [data-animation] { /* … */ animation-play-state: var(–animps, running); } /* Use a checkbox to pause animations */ [data-animation-pause]:checked ~ [data-animation] { –animps: paused; } But one of the listed use cases is …
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“Higher Level Custom Properties” are Custom Properties that control multiple other CSS Properties. Although still a proposal it’s worth having a look already as they’re really exciting.
As the syntax for CSS Custom Properties is overly permissive it’s possible to store a JavaScript attack vector in them …
Will Boyd: CSS custom properties can hold all sorts of things. Some of these things were not obvious to me, which is why I decided to write this. In short: they can contain just about everything. It’s only until CSS Custom Properties are used in a certain context as a CSS Variable — using var() …
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When mentioning CSS Custom Properties here on bram.us I do tend to name them like that — and not CSS Variables — as that’s their official name. I always thought the terms could be used interchangeably — with CSS Variables simply being the unofficial name — but as detailed by Šime Vidas on Web Platform …
What happens when you combine the fact that part after the : for CSS Custom Properties doesn’t need to be valid CSS with window.getComputedStyle()? You get a way of passing data – including Arrays, Objects, and even JSON – from CSS to JavaScript. Psst… Hey kid… Did you know you can pass data from your …
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Great usage of CSS Custom Properties in combination with calc() by Steve Gardner to cater for users who have prefers-reduced-motion set to reduce: CSS variables (custom properties) makes supporting reduced motion settings super easy. There is little excuse to not too. — Steve Gardner (@steveg3003) July 21, 2017 By setting –duration to 0 it basically …
In CSS we have feature queries (@supports) available to create if–else-like structs. What if we could extend our means of using conditions in CSS? Roman Komarov provides us with a clever technique – which involves using CSS Custom Properties, calc(), and some binary logic – to implementing this type of conditions on a per CSS …
var(--subtitle);As per usual, great talk by Lea Verou: The key takeaway about CSS Custom Properties to me is the very first one Lea mentioned: they’re just properties like the other CSS properties we already know. This means that the normal behavior of inheritance is in place, you can manipulate them from within media queries, and …