This is a great talk by Hidde, looking at the history and evolution of cascading style sheets. Right up my alley!
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.
Some great practical examples of progressive enhancement on one website:
- using grid layout in CSS,
- using the
pictureelement to provide
webpimages in HTML.
All of those enhancements work great in modern browsers, but the underlying functionality is still available to a browser like Opera Mini on a feature phone.
It’s now easier than ever to style form controls without sacrificing semantics and accessibility:
The reason is that we can finally style the ::before and ::after pseudo-elements on the
<input>tag itself. This means we can keep and style an
<input>and won’t need any extra elements. Before, we had to rely on the likes of an extra
<span>, to pull off a custom design.
The demo is really nice. And best of all, you can wrap all of these CSS enhancements in a feaure query:
Hopefully, you’re seeing how nice it is to create custom form styles these days. It requires less markup, thanks to pseudo-elements that are directly on form inputs. It requires less fancy style switching, thanks to custom properties. And it has pretty darn good browser support, thanks to
Excellent news! All the major browsers have agreed to freeze their user-agent strings, effectively making them a relic (which they kinda always were).
For many (most?) uses of UA sniffing today, a better tool for the job would be to use feature detection.
Tim ponders the hard work that goes into adding standards to browsers, giving us a system with remarkable longevity.
So much care and planning has gone into creating the web platform, to ensure that even as new features are added, they’re added in a way that doesn’t break the web for anyone using an older device or browser. Can you say the same for any framework out there?
His parting advice is perfect:
Use the platform until you can’t, then augment what’s missing. And when you augment, do so with care because the responsibility of ensuring the security, accessibility, and performance that the platform tries to give you by default now falls entirely on you.
Jon’s ranting about Agile here, but it could equally apply to design systems:
Agile and design is like looking at a picture through a keyhole. By slicing big things into smaller things, designers must work incrementally. Its this incrementalism that can lead to what I call the ‘Frankensteining’ of a digital product or service.
If you ignore the slightly insulting and condescending clickbaity title, this is a handy run-down of eight browser features with good support:
- extra arguments in
- extra arguments in
defaultCheckedproperty for checkboxes,
wholeTextfor strings of text,
Following on from that proposal for a browser feature that I linked to yesterday, Tim thinks through all the permutations and possibilities of user agents allowing users to throttle resources:
If a limit does get enforced (it’s important to remember this is still a big if right now), as long as it’s handled with care I can see it being an excellent thing for the web that prioritizes users, while still giving developers the ability to take control of the situation themselves.
font-feature-settings value demonstrated in one single page.
A great long-term perspective from Rachel on the pace of change in standards getting shipped in browsers:
The pace that things are shipping, and at which bugs are fixed is like nothing we have seen before. I know from sitting around a table with representatives from each browser vendor at the CSS Working Group how important interop is. No-one wants features to be implemented differently in browsers. This is what we were asking for with WaSP, and despite the new complexity of the platform, browsers rendering standard features in different ways is becoming increasingly rare. Bugs happen, sometimes in the browser and sometimes in the spec, but there is a commitment to avoid these and to create a stable platform we can all rely on. It is exciting to be part of it.
Andy describes the technical approach he took building his handy reporting tool, My Browser:
Although the site is built with bleeding edge technology such as web components, it’s built with a progressive-first approach. This means that in order to get the best experience, you need to be on a modern browser, but to do the most basic function—reporting data, you can still do it by pressing a “generate report” button, which is the default state.
Not only is this a liberating way to work, it really pays off in performance:
We’re given so much for free to make a progressively enhanced website or web app. We’ve got feature detection and
@supportsin CSS which means that “My Browser” ships with no polyfills, fallbacks or hacks like Autoprefixer. The app degrades gracefully instead.
This has been a very refreshing way to work that I’ve enjoyed a lot. The fact that the whole thing comes in around 25kb tells you how effective progressive enhancement can be for performance too.
What’s new in Microsoft Edge in the Windows 10 April 2018 Update - Microsoft Edge Dev BlogMicrosoft Edge Dev Blog
Service workers, push notifications, and variable fonts are now shipping in Edge.
A great set of answers from Rachel to frequently asked questions about CSS grid. She addresses the evergreen question of when to use flexbox and when to use grid:
I tend to use Flexbox for components where I want the natural size of items to strongly control their layout, essentially pushing the other items around.
A sign that perhaps Flexbox isn’t the layout method I should choose is when I start adding percentage widths to flex items and setting
flex-growto 0. The reason to add percentage widths to flex items is often because I’m trying to line them up in two dimensions (lining things up in two dimensions is exactly what Grid is for).
A handy browser-based tool for examining font files to see which features they support.
24 Ways is back! Yay! This year’s edition kicks off with a great article by Hui Jing on using
Chances are, the latest features will not ship across all browsers at the same time. But you know what? That’s perfectly fine. If we accept this as a feature of the web, instead of a bug, we’ve just opened up a lot more web design possibilities.
Jason lists the stages of gradually turning the Cloud Four site into a progressive web app:
And you can just keep incrementally adding and tweaking:
You don’t have to wait to bundle up a binary, submit it to an app store, and wait for approval before your customers benefit.
Cameron counts the ways in which Flash was like a polyfill.
Yeah, that’s right: The Man In Blue is back!