base-ui-svelte
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TypeScript

Strict typing with Svelte 5 props, snippets, and bindable state.

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Component props extend Svelte’s HTML attribute types (svelte/elements). Optional props respect exactOptionalPropertyTypes.

Patterns in this port

  • $props() / $bindable for controlled values
  • Snippet types for children and render-state children
  • Namespace objects for compound components (typeof Popover)

Shared naming still tracks Base UI; React-specific types (useRender.ComponentProps, etc.) do not apply. See Differences and Composition.

Upstream: Base UI TypeScript.