What do you use for UI components? I recently built my first SvelteKit project and using Tailwind to compose UI components vs. Vue+Vuetify was like writing binary by hand instead of using an expressive modern language that abstracts away 99% of plumbing.

What takes 10 seconds and 20 chars in Vuetify takes 10~100 minutes and multiple components/sub-components written by hand in Tailwind in Svelte.

Of course talking about Tailwind isn't Svelte/SvelteKit specific: I just couldn't find a remotely comparable UI library for Svelte so I gave up and stuck with Tailwind to get the project done.

That's one of the issues with Svelte. It's a newcomer so the ecosystem is minuscule.

Personally I'm happy using Bulma with Svelte. I find most UI libraries tend to add too much bloat so I'd rather have something that only adds configurable CSS and just add as much JS as I need/want.

I used Vue+Vuetify some years ago. I wasn't very happy with it, but I agree Svelte needs something similar.

There are a couple of projects out there that add Svelte components for Bootstrap, Material, or IBM Carbon you could check.

https://sveltematerialui.com/

https://github.com/bestguy/sveltestrap

https://github.com/carbon-design-system/carbon-components-sv...

There are also a couple of projects about headless (no CSS) components for Svelte although I only seem to be able to find this one (not public yet)

https://svelteui.com/

Wouldn't https://tailwindui.com/ solve your problem?

I think GP meant components that require JS like data tables which TailwindUI doesn't solve.

I guess something like Tailwind Headless (only available for React and Vue):

https://headlessui.dev/

I ported this library to Svelte recently: https://github.com/rgossiaux/svelte-headlessui

As a side note, Tailwind UI does include some components that require JS--that's what the Headless UI library is for. But it's also true that it's not a comprehensive component library; still missing things like a combobox or a date picker.

What does it simplifies in contrast to React?

Pretty much everything except that the ecosystem is very young.

Other than greatly simplifying components, Svelte includes reactive primitives to build your models/stores with. No need for MobX, Redux, etc. It also includes animation tools which again would require third-party deps.