I knew that custom properties don’t work in media queries but I had no idea that there was such a thing as custom media queries, which effectively do the same thing.
But this is not implemented in any browser. Boo! This would be so useful! If browser makers can overcame the technical hurdles with container queries, I’m sure they can deliver custom media queries.
I’ve been having some really interesting chats with Brian about tabs, markup, progressive enhancement and accessibility. Here’s a braindump of his current thinking which is well worth perusing.
The point of this post is to show how nicely container queries can play with web components, but I want to also point out how nice the design of the web component is here: instead of just using an empty custom element, Max uses progressive enhancement to elevate the markup within the custom element.
A curated list of awesome framework-agnostic standalone web components.
I really like the idea of a shared convention for styling web components with custom properties—feels like BEM meets microformats.
Oh, this is smart! You can’t target pseudo-elements in JavaScript, but you can use custom properties as a proxy instead.
Type and space are linked, so if you’re going to have a fluid type calculator, it makes sense to have a fluid space calculator too. More great work from Trys and James!
Robin makes a good point here about using dark mode thinking as a way to uncover any assumptions you might have unwittingly baked into your design:
Given its recent popularity, you might believe dark mode is a fad. But from a design perspective, dark mode is exceptionally useful. That’s because a big part of design is about building relationships between colors. And so implementing dark mode essentially forced everyone on the team to think long, hard, and consistently about our front-end design components. In short, dark mode helped our design system not only look good, but make sense.
So even if you don’t actually implement dark mode, acting as though it’s there will give you a solid base to build in.
I did something similar with the back end of Huffduffer and The Session—from day one, I built them as though the interface would be available in multiple languages. I never implemented multi-language support, but just the awareness of it saved me from baking in any shortcuts or assumptions, and enforced a good model/view/controller separation.
For most front-end codebases, the design of your color system shows you where your radioactive styles are. It shows you how things are tied together, and what depends on what.
I’m very taken with Github’s tab-container element—this is exactly how I think web components should be designed!
A reminder that the contens of custom properties don’t have to be valid property values:
From a syntax perspective, CSS variables are “extremely permissive”.
A spot-on summary of where we’ve ended up with web components.
Web Components had so much potential to empower HTML to do more, and make web development more accessible to non-programmers and easier for programmers.
But then…
Somewhere along the way, the space got flooded by JS frameworks aficionados, who revel in complex APIs, overengineered build processes and dependency graphs that look like the roots of a banyan tree.
Alas, that’s true. Lea wonders how this can be fixed:
I’m not sure if this is a design issue, or a documentation issue.
I worry that is a cultural issue.
Using a custom element from the directory often needs to be preceded by a ritual of npm flugelhorn, import clownshoes, build quux, all completely unapologetically because “here is my truckload of dependencies, yeah, what”.
This is a great bit of detective work by Amber! It’s the puzzling case of The Browser Dev Tools and the Missing Computed Values from Custom Properties.
Who do I know working on dev tools for Chrome, Firefox, or Safari that can help Amber find an answer to this mystery?
I think this a solution worthy of Solomon. In this case, the Gordian knot is the select element and its inevitable recreation in order to style it.
What if we instead deliver a native select by default and replace it with a more aesthetically pleasing one if possible? That’s where the “hybrid” select idea comes into action. It’s “hybrid” because it consists of two selects, showing the appropriate one at the right moment:
- A native select, visible and accessible by default
- A custom select, hidden until it’s safe to be interacted with a mouse
The implementation uses a genius combination of a hover media query and an adjacent sibling selector in CSS. It has been tested on a number of device/platform/browser combinations but more tests are welcome!
What I love about this solution is that it satisfies the stakeholders insisting on a custom component but doesn’t abandon all the built-in accessibility that you get from native form controls.
Matthias has a good solution for dealing with the behaviour of CSS custom properties I wrote about: first set your custom properties with the fallback and then use feature queries (@supports) to override those values.
Yet another clever technique from Lea. But I’m also bookmarking this one because of something she points out about custom properties:
The browser doesn’t know if your property value is valid until the variable is resolved, and by then it has already processed the cascade and has thrown away any potential fallbacks.
That explains an issue I was seeing recently! I couldn’t understand why an older browser wasn’t getting the fallback I had declared earlier in the CSS. Turns out that custom properties mess with that expectation.
Sara shares how she programmes with custom properties in CSS. It sounds like her sensible approach aligns quite nicely with Andy’s CUBE CSS methodology.
Oh, and she’s using Fractal to organise her components:
I’ve been using Fractal for a couple of years now. I chose it over other pattern library tools because it fit my needs perfectly — I wanted a tool that was unopinionated and flexible enough to allow me to set up and structure my project the way I wanted to. Fractal fit the description perfectly because it is agnostic as to the way I develop or the tools I use.
I’m not the only one swapping out Sass with CSS for colour functions:
Because of the declarative nature of CSS, you’re never going to get something as terse as what you could get in Sass. So sure, you’re typing more characters. But you know what you’re not doing? Wrangling build plugins and updating dependencies to get Sass to build. What you write gets shipped directly to the browser and works as-is, now and for eternity. It’s hard to say that about your Sass code.
This is clever—using custom properties to enable if/else logic in CSS.
I don’t understand what currying is, but Trys points out a really interesting thing about custom properties in CSS:
The value after the : in the CSS custom property does not have to be valid CSS.
That means you can use custom properties to store arbitrary strings of text, which can then be combined within a calc() function, at which point they get evaluated.
Andy takes Utopia for a spin—it very much matches his approach.