@octanejs/base-ui

Base UI (@base-ui/react) ported to the octane UI framework — headless, accessible, unstyled UI primitives.

Alpha, in progress. Ported at full fidelity from the pinned mui/base-ui source (v1.6.0), proven by differential parity tests against the real @base-ui/react. See docs/base-ui-migration-plan.md for the phased plan and progress.

API

Mirrors Base UI's deep-subpath imports:

import { Separator } from '@octanejs/base-ui/separator';
import { useRender } from '@octanejs/base-ui/use-render';
import { mergeProps } from '@octanejs/base-ui/merge-props';

Every component takes Base UI's universal composition props — render (a JSX element or (props, state) => element), className (string or (state) => string), and style (object or (state) => object) — routed through useRenderElement.

Intentional divergences from Base UI (React)

• Native events, not synthetic. Handlers receive native DOM events (octane delegates natively). event.preventBaseUIHandler() still works — the shim is attached to the native event.
• ref-as-prop. No forwardRef; ref is a normal prop (React-19 shape).
• className composition follows octane's normalizeClass at the apply site; the render-prop merge concatenates strings exactly like Base UI.

Status

Current scope, known divergences, and verification status are tracked in the generated bindings status table, sourced from this package's status.json.