Last week I spoke at the very lovely Web Day Out about browser support. One of the things I mentioned was how the data behind Baseline gives you a way to look into the future of the web platform. I've written some more about that on my blog rachelandrew.co.uk/archives/202...
new post on my personal blog.
i think these three areas often go unexplained, so hopefully this explains why some of these packages exist. these are fine to exist but the majority of developers shouldn't have to pay the cost for them.
@mixin --foo(--arg <length>) { @result { &, & > h2, & + p { width: var(--arg); } } } div { @apply --foo(10em); font-size: 10px; } div > h2 { font-size: 20px; } div + p { font-size: 30px; }
🚨 Want mixins in CSS?
Help the CSS WG by telling us what feels natural to you!
Look at the code in the screenshot. What resulting widths would *you* find least surprising for each of div, div > h2, div + p?
Polls:
┣ Github: github.com/LeaVerou/blo...
┗ Mastodon: front-end.social/@leaverou/11...
It took a while, but the State of JS 2025 survey results are now live! 2025.stateofjs.com/en-US
Thanks to @danielroe.dev for contributing the conclusion.
Btw you don’t need to be a web spec author or work for a browser vendor to contribute to this.
If you spot some incorrect data (either says it supports web it doesn’t, or says it doesn’t when it does) then open an issue — or better yet a PR! Make things better for everyone, including future you!!
Another year in the books! 🎉 Congrats to the entire Web Almanac team.
I know all too well how much time and effort goes into putting this together, but it continues to be an invaluable resource cited across the industry
Thank you to all the contributors almanac.httparchive.org/en/2025/cont... ❤️
The @e18e.dev community does amazing work to speed up and modernize the web
Now's as good a time as ever to join and contribute to this hugely impactful project!
This is one of the coolest things I've seen in years. Great presentation too!
www.youtube.com/watch?v=sXwD...
If you've been thinking about entering the Baseline Tooling Hackathon, the clock is ticking!
3 days left
2800 developers
$10,000 in prizes
baseline.devpost.com
Did you know that AVIF (the AV1 Image File Format) was supported in all the major browsers (Firefox, Safari, Chrome/Edge)?
This has been the case for almost 2 years at this point.
Save the date! The Web Engines Hackfest 2026 will be held from June 15 to 17 in A Coruña (Galicia, Spain) www.igalia.com/2025/10/01/A...
Browserslist now supports Baseline
Simplify your build toolchains with native Baseline support → goo.gle/46cTnCR
Thanks to a collaboration between the Browserslist team and the WebDX Community Group, a new set of Baseline queries has been included directly in Browserslist itself.
A few years ago I started writing about evolving web standards and @rbyers.net suggested I should cover WPT: the web platform tests project that most people working with the web have a vague idea about that has evolved into an engine of interoperability. since then, I've been tracking people down
✅ Baseline now has full feature coverage, making it easier to know which web platform features are ready to use.
Build the next wave of Baseline-powered tools and compete for $10,000 in prizes → goo.gle/424SBWc
Before, you needed a plugin to use Baseline semantics in your Browserslist queries. Now you don't!
Just give it a target like `baseline widely available` and it'll work out of the box
Available in browserslist@4.26.0 and later
web.dev/blog/browser...
A friend of mine is obsesses with them. I kept an open mind and tried one and I still don't get it. The fries are all soggy. What's the point of fries that are soggy?!
From idea to impact, that’s the journey 💡 The Baseline Tooling Hackathon is on! Create a project that solves real-world developer needs using Baseline data for your shot at a $10,000 prize pool.
Don’t delay! Submissions close Oct 6 → baseline.devpost.com
#WhatsMyBaseline
The WebDX CG's mission is to improve YOUR experience developing on the web platform. We're behind familiar research and interop efforts like the State of... surveys and Baseline.
Let's chat!
We're hosting an AMA on r/webdev September 18, but you can post your Qs now
web.dev/blog/baselin...
i don't enjoy the romanticizing
of some golden past of the web
that web never died
you made all the decisions
about where to publish
and where to spend your time
Want to make the web better for yourself and fellow devs and win cash prizes? Join the Baseline Tooling Hackathon! web.dev/blog/baselin...
I know some people in the web community are concerned that Baseline will discourage devs from using new features—or anything not "Widely Available".
Personally, I'm not worried about that at all. If anything, I think Baseline will speed up new feature adoption!
Here's why 🧵
🎉 Happy 30-month anniversary to Container Queries – in every browser since Feb, 2023. It was supposed to be impossible, but here we are!
Why 2.5 years? Nothing will change tomorrow, but Baseline uses this milestone to signal confidence a feature has gained "wide" support.
youtu.be/bhHV0rQ3-CQ
Baseline widely available covers 98.2% of all traffic on webstatus.dev Now I'm curious about the 1.8% 😀 #WhatsMyBaseline
What new web features are your users actually ready for? Stop guessing. 🔮
Baseline helps you make data-driven decisions so you can ship the right features at the right time. Learn more and find your target with #WhatsMyBaseline → goo.gle/whats-my-baseline
🚀 The #StateOfHTML 2025 survey is now open!
➡️ Take it now: survey.devographics.com/en-US/survey...
💡 Spending time to fill these out is an investment into your craft, as browsers are using the results to make prioritization decisions.
You don't have to do it in one sitting (or even one device).
I've added Baseline status to the CSS property documentation tooltips I previously implemented in @chromium.social DevTools.
#DX #DevEx #DeveloperExperience #UX #UserExperience #Baseline
Great to see @atopal.bsky.social talking Baseline yesterday along with Natalia and Michael at #GoogleIOConnect Berlin 👏
Chart titled "Features missing in only one browser". The most recent Safari data point is selected and a list of features is shown underneath.
I LOVE this …Chart of Shame on webstatus.dev/stats “Features missing in only one browser”.
Even lets you click on individual data points and see which features each browser is holding the Web back from!
Hopefully it will motivate implementations of these features!
Here's my talk from I/O along with the companion blog post that rounds up all of the links mentioned. It's been a very exciting year for the web, and all the new Baseline tooling we've just announced can help you understand when to adopt these new features. web.dev/blog/whats-n...
Screenshot of a VSCode dialog indicating that the `<dialog>` element is widely available across major browsers since 2022.
Baseline is now available in VSCode. This is a really neat feature with no extensions needed.
(catching up on Google I/O 😅)
Read more: web.dev/blog/baselin...
