As we reach the end of 2026, Interop 2027 is currently being planned, and the team at Mozilla has created a ranking system(opens in new tab) for us to upvote our most-requested features. They plan on using the ranking data to decide what to include for next year’s Interop!
In this blog post, I want to dig into the top 10 features I voted for, to offer a bit of a preview of what CSS might look like within the next year. There will also be some little tips and tricks you can start using today!
If you’re familiar with JavaScript, this should feel pretty familiar. We define new functions with @function and specify the returned value with result.
This feels pretty “science-fiction” to me, but it’s already implemented in Chromium browsers, and if it gets added to Interop 2027, I think there’s very good odds that it could become widely available sooner rather than later!








