Except that the top bar covers about the top 2/3 of it on mobile safari. This glitch renders essentially the entire site useless.
(What’s up with floating top bars? Either just make them be a real part of the page, or move them to the bottom, or, if absolutely necessary, keep them floating and test the heck out of them. Because that floating element that can’t be dismissed will result in a near 100% reduction in your conversion rate all by itself.)
These components are not used inside any Jetbrains IDEs. Those IDEs are, of course, written in Java and cannot use a browser-based UI framework. This is for "our web-based products like YouTrack, Hub, TeamCity, and Upsource" (per the original release blog post for Ring UI). Those products support mobile.
JetBrains IDEs are not on mobile though. It doesn't matter if they're incidentally accessed on mobile if they're not actually designed to be used on mobile.
It's a bug that manifests itself on mobile, but it probably does the same thing on desktop too if you shrink the window really small, and even if it doesn't, it's just a CSS big that is triggered by mobile browsers. There's nothing big that is preventing it from working fine on mobile. Most of the pages do work fine.
I guess this is more desktop-centric than most other browser-based UIs - I mean, JetBrains is mostly developer tools, and most people don't use their phone for programming...
I don't but I do use, and am interested in, their software. So it's a bit disappointing to see a link to their site while using hn on mobile, only to get to a page that doesn't display anything useful.
You seem to assume that everybody on this website knows what Ring UI is. But I didn't know and judging from quite a few other comments here, I wasn't the only one. All we had to go by was the title "JetBrains Ring UI" and a comment stating that a date picker looks nice. Without any kind of description it's not that weird to assume a website with a datepicker works decently on mobile.
I'd totally use them on my mobile devices if versions for them existed. They're just too convenient even though they lack a keyboard. Wish I could use them to write software.
(What’s up with floating top bars? Either just make them be a real part of the page, or move them to the bottom, or, if absolutely necessary, keep them floating and test the heck out of them. Because that floating element that can’t be dismissed will result in a near 100% reduction in your conversion rate all by itself.)