Show HN: Sycamore – next gen Rust web UI library using fine-grained reactivity
by lukechu10 on 4/1/2026, 12:30:18 PM
Comments
by: electrograv
IMO a UI library landing page should always contain a screenshot example of the UI.<p>I can’t find a screenshot of it anywhere, let alone the landing page.
4/1/2026, 1:29:12 PM
by: dewey
In the footer: "This website is also built with Sycamore. Check out the source!" <a href="https://github.com/sycamore-rs/website" rel="nofollow">https://github.com/sycamore-rs/website</a>
4/1/2026, 1:51:18 PM
by: gwbas1c
> Reactive Apps with Effortless Performance.<p>> Sycamore is a next generation Rust UI library powered by fine-grained reactivity.<p>It's not clear on the landing page that this is for <i>in-browser</i> UI, as opposed to <i>desktop UI</i> and/or <i>mobile UI</i>.<p>I would make it completely unambiguous that Sycamore is for web applications.
4/1/2026, 2:13:49 PM
by: wsowens
I looked briefly, but is anyone aware of the differences between Yew[1] and Sycamore[2]? Presumably they are both Elm-influenced(?) Rust web UI libraries named after trees, but it's unclear to me why I should use one versus the other.<p>1. <a href="https://github.com/yewstack/yew" rel="nofollow">https://github.com/yewstack/yew</a><p>2. <a href="https://github.com/sycamore-rs/sycamore" rel="nofollow">https://github.com/sycamore-rs/sycamore</a>
4/1/2026, 2:41:41 PM
by: embedding-shape
The website mentions "giving you full control over performance", what are those knobs and levers exactly? What does those knobs and levers influence, and what sort of tradeoffs can you make with the provided controls?
4/1/2026, 1:07:39 PM
by: cma256
I really like these projects but missing from them is genericity. If you're taking the time to build a WASM app in Rust it would be nice if that app could compile to something other than WASM. For example, looking at the sycamore website's source I see p, h1, div, etc. What I'd rather see is "row", "column", "text". In their source I see tailwind what I'd rather see is "center", "align right", etc.<p>In other words, elm-ui but for these WASM Rust apps. Building a mobile app, a desktop app, and a web app, in my mind, should be accomplish-able given the right primitives (without requiring a JavaScript runtime be bundled). Rust's multi-crate workspaces make it a really great candidate for solving these cross-platform problems. IMO of course.
4/1/2026, 2:12:17 PM
by: eviks
What is "next gen" about it, is it "just" fine-grained reactivity? Or is this opposed to prev gen of Rust web UI libs, which were...? Couldn't find it in the book quickly, and it seems to not even have search...
4/1/2026, 3:08:11 PM
by: 0x3f
I think if you're going to use Rust on front end you're probably going to use it on back end too. In that case, I would just use Dioxus and get the e2e typing for free. What would be the benefit of Sycamore?<p>I wouldn't recommend e2e Rust generally yet though. I think server/API + web could work, but mobile is just boiling the ocean and will never be as good as native. You might think you can just use it for server/API + web, then do native mobile apps, but actually the escape hatches in all the frameworks I've used are not great.<p>Sad to say but "just use React" remains the good advice.
4/1/2026, 2:19:29 PM
by: arpadav
i've had my shot at sycamore a number of times. IMO leptos (leptos.dev) has far more fine-grained capabilities, and dioxus (dioxuslabs.com) is overall more hand-holdy but also powerful. comes with tradeoff for speed. wasm still isnt there yet (yet..) but a lot more web frameworks (including smaller rust ones) can be tracked here: <a href="https://krausest.github.io/js-framework-benchmark/current.html" rel="nofollow">https://krausest.github.io/js-framework-benchmark/current.ht...</a>
4/1/2026, 2:02:52 PM
by: jtrueb
Is there a new version or news related to this? v0.9 was Nov 2024, and Leptos and Dioxus have been a lot more active.
4/1/2026, 1:28:17 PM
by: conceptme
a UI library needs some demo
4/1/2026, 1:04:02 PM
by: sourcegrift
Looks very good and probably will be my library of choice for my next web project.<p>For desktop, I'm very happy with qmetaobject-rs. Qt is time tested and highly reliable. And gui is, frankly, serious business.<p>Also, Generally speaking, UI itself is best done declaratively rather than imperatively. There's a reason quick is adopted more than qwidgets.
4/1/2026, 1:04:40 PM