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Bits UI

Headless Svelte 5 component primitives for building a custom visual system, with composable controls, menus and date inputs rather than a fixed theme.

Svelte
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Working with this library

Verified 2026-09-30. Install bits-ui from npm and import composed primitives into Svelte files. Official documentation specifies Svelte 5 and supports class/style props and data-attribute styling; Tailwind CSS and UnoCSS are optional styling approaches, not requirements. Official repository: MIT license, free open-source code. The author emphasizes accessibility; this run did not independently audit keyboard or assistive-technology behavior. Editorial usefulness: a foundation for Svelte teams that want control of visual design. Tradeoff: applications must supply styling and validate their own composed UI. Not a React library or a ready-made visual theme. Sources: https://www.bits-ui.com/docs/getting-started ; https://www.bits-ui.com/docs/introduction ; https://github.com/huntabyte/bits-ui/blob/main/LICENSE .

Pricing

Open source

Free

MIT-licensed library code. Optional sponsorship is not a required license fee. No paid service or support plan was verified.

Last checked Sep 30, 2026. Prices and licensing may change.

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Compare Bits UI with alternatives

These guides include Bits UI and explain when to choose it, what you take on, and where another library may fit better.

Landing page preview

Landing page of Bits UI

Captured Sep 30, 2026. This is a visual reference; check the library's license before using its components.

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