Rewrite Flow to use computed layout over relying on DOM layout.

Flow now measures node sizes, reconstructs the flow tree, and computes node positions and connector paths from that derived state instead of chaining DOM rect reads. This keeps connectors aligned through resize and scroll changes, supports nested flow structures more predictably, and makes anchor-based connector placement follow the anchor midpoint.

Add target prop to Sidebar.MenuSubButton for parity with Sidebar.MenuButton — forwarded to the link when href is set, so link sub-items can control where they open (e.g. same-tab cross-origin navigation).

Add auto-resize support to InputArea and Textarea.

Add vertical reference markers to TimeseriesChart.

Add horizontal threshold lines to TimeseriesChart.

Include chart components exported from multi-component barrel directories in the generated component registry, with complete props metadata for generic interfaces.

Keep the mobile Sidebar open when focus moves to portaled interactive content.

Disable Sidebar.MenuButton tooltips while the sidebar is expanded or peeking.

Add ChoroplethMap, a GeoJSON region choropleth chart component that joins data rows to features by name/nameProperty and shades regions with a continuous visualMap scale. Includes Kumo light/dark map colours, tooltip formatting, optional legend, hover/click callbacks, roam controls, docs, and demos.

Both BubbleMap and ChoroplethMap now apply a d3-geo projection (latitude-clamped Mercator by default; pass another d3-geo projection or null for raw plotting) and size by aspectRatio so the map fills its container without letterboxing. The container height now derives from the projected window's aspect ratio by default; pass an explicit height to opt back into a fixed pixel height.

Update BubbleMap viewport behavior to avoid resetting user pan and zoom while refreshing bubble data.

BubbleMap now defaults roam to false to avoid accidental pan and zoom interactions. Consumers that want drag-to-pan or scroll-to-zoom can pass roam={true}.

Add orientation="vertical" support to Flow for laying out nodes top-to-bottom. The align prop now controls cross-axis alignment in both orientations.

feat(chart): add BubbleMap chart component

New BubbleMap component renders proportional bubbles over a registered geographic map using ECharts' scatter series. Includes value-based radius scaling, a mapColors palette addition to ChartPalette, and supporting types. Also extracts escapeHtml / defaultValueFormat tooltip helpers into a shared tooltip-utils module reused by SankeyChart.

Keep primary and destructive button active/focus rings matched to their variant color.

Use the Button component for Toast close controls and match the hover tint to the toast variant.

Limit Dropdown content height to available viewport space to prevent overflow.

Replace the internal class merging implementation with cnfast.

fix(button): resolve Firefox rendering artifact when Turnstile is present

Replace translate-y-px with box-shadow: inset 0 1px 0 0 var(--kumo-button-emphasis-bg) on the primary/destructive button emphasis overlay span. The transform triggered a rendering bug in Firefox on pages with Turnstile's contain: strict CSS. The box-shadow achieves the same visual depth effect without the rendering issue.

Fix Dialog size prop to set a fixed width instead of only a minimum width. Previously, dialog content could stretch the dialog beyond its intended size.

Update Base UI to 1.6.0.

Add Toolbar for composing explicit toolbar controls into a shared grouped card.

feat(chart): add enableLegendSelection prop to TimeseriesChart

Opt-in (default false) hidden ECharts legend that lets consumers drive series visibility imperatively via the legendSelect / legendUnSelect / legendToggleSelect actions — useful for building a custom interactive legend with ChartLegend. Series toggled off via the legend are also excluded from the tooltip. Requires registering ECharts' LegendComponent (echarts.use([LegendComponent])). When disabled, behaviour is unchanged.

Extend LegendItems to take pointer events & timeseries merges forwardref to support those events

Update the Button primary and destructive variants with token-derived gradient treatments.

Fix horizontal scroll in Sidebar.Content: always apply overflow-x: hidden on the scroll viewport, not just when collapsed. Base UI's ScrollArea.Viewport sets overflow: scroll as an inline style, which allowed ~14px of horizontal overflow when consumer content (e.g. search buttons with keyboard shortcuts) exceeded the sidebar width.

feat(radio): add generic value type support to Radio.Group and Radio.Item

Fix the green Badge variant missing its background color token.

Keep generated component registry descriptions to JSDoc summaries before markdown sections or code examples.

fix(button): use ring-kumo-line for default secondary button ring

Refine outline and secondary destructive button hover states.

fix(sidebar): correct GroupLabel top margin from mt-6 to mt-4

Allow unprefixed Dialog max-width classes to override the default viewport cap at desktop breakpoints.

Sidebar: mobile rewrite, smooth collapse transitions, and new props

New features:

• mobileBreakpoint prop on Provider — configurable viewport width for mobile detection
• contentClassName prop on Sidebar root — pass-through class for the inner content container
• Controlled mobile state — open prop now controls the mobile sidebar too, not just desktop

Fixes:

• Replaced Base UI Dialog mobile sidebar with a plain <nav> + backdrop for simpler, more predictable transitions
• Collapsible sections now animate closed smoothly when the sidebar collapses instead of snapping shut
• Removed hidden class from Sidebar.MenuSub so sub-menus participate in collapse animations
• Removed inertValue React-version helper — SidebarSlidingView now sets inert imperatively for React 18 compatibility
• Restored inert on closed SidebarCollapsibleContent while removing its data-open attribute

Styling:

• bg-kumo-tint → bg-(--sidebar-active-bg) CSS variable for active/hover/focus backgrounds
• Icon opacity 0.5 → 0.4; chevron gains hover opacity transition
• Header gains shrink-0 and animated padding on collapse
• Content scroll area gains animated gap transition and tabIndex={-1} on viewport
• Sliding views container gains max-w-(--sidebar-width) to prevent overflow
• Mobile sidebar uses --sidebar-animation-duration CSS variable for slide transition

Add React 18 and React 19 compatibility checks for Kumo tests.

Fix Chart (and SankeyChart) rendering in dark mode. The chart canvas now stays transparent so the surrounding bg-kumo-* surface shows through symmetrically in both modes, and ECharts' built-in "dark" theme is applied when isDarkMode is true so the tooltip card, axes, splitLines, and legend text are themed correctly.

fix(sidebar): add text truncation with ellipsis to Sidebar.MenuButton content

Previously, Sidebar.MenuButton used overflow-hidden which clipped long text without showing an ellipsis. Now uses truncate to match Sidebar.MenuSubButton's behavior.

Fix segmented Tabs scroll fade, scroll-into-view, and ring styling:

• Rewrite CSS scroll-fade masking to use @property-animated custom properties, fixing proportional fade rendering across browsers.
• Scroll the selected tab into view on click so it stays visible in overflowing tab lists.
• Move ring ring-kumo-hairline/70 from the inner list to the root container so the segmented variant ring wraps the entire component correctly.

Fix Flow connector rendering in Firefox by emitting valid SVG path data without array commas and setting visible overflow on the SVG element attribute.

Restore React 18-compatible Sidebar inert attribute handling while keeping the full React compatibility CI suite.

Fix Combobox and Autocomplete rendering in React 18 by using the explicit context provider API.

Update Banner to use borderless tinted styling by default and add a secondary variant.

Re-export useFilter from Combobox and Autocomplete namespaces. Use it to write custom filter props that preserve Base UI's default case- and accent-insensitive matching via Intl.Collator.

Sidebar: comprehensive modernization

Breaking changes:

• Removed Sidebar.Input — build custom search triggers inline
• Removed Sidebar.MenuAction — unused in practice
• Removed Sidebar.GroupContent and group-level collapsible props (collapsible, defaultOpen, open, onOpenChange) from Sidebar.Group — use Sidebar.Collapsible at the item level instead
• Replaced Base UI Collapsible dependency with custom CSS grid-rows implementation
• SidebarState type is now "expanded" | "collapsed" | "peeking" (was "expanded" | "collapsed")

New features:

• contained prop on Provider — absolute positioning for embedded/demo sidebars
• peekable prop on Provider — hover/focus collapsed sidebar to temporarily expand
• animationDuration prop on Provider — configurable animation timing
• Sidebar.SlidingViews + Sidebar.SlidingView — animated horizontal transitions between navigation surfaces
• Animated SidebarPanelIcon replacing Phosphor SidebarSimpleIcon
• Enhanced Sidebar.Trigger with aria-expanded and dynamic aria-label
• Keyboard-accessible resize handle (arrow keys, Home, End)
• Custom Sidebar.Collapsible with keyboard auto-expand on focus

Token/styling fixes:

• border-kumo-hairline → border-kumo-line throughout
• Hardcoded duration-250 → --sidebar-animation-duration CSS custom property
• bg-kumo-base → bg-(--sidebar-bg) for theme overridability
• Focus styles: ring-2/ring-kumo-brand → outline-none/text-kumo-strong/bg-kumo-tint
• Icon opacity-50, updated spacing (header h-58px, footer h-12, menu gap-y-px)
• isolate on sidebar root with low z-index (z-1, z-2) instead of z-20/z-50
• Mobile sidebar now has correct data-state/data-side/data-variant/data-collapsible attributes

TimeseriesChart: React tooltip with Base UI positioning

Replaces ECharts' HTML-string tooltip with a React component positioned by Base UI's Tooltip primitive:

• Tooltip rendered as a React component with correct theme tokens — no more inline styles or getComputedStyle hacks
• Positioning handled by Base UI Tooltip (Floating UI), with automatic collision avoidance and viewport flipping
• New tooltipFollowCursor prop: "both" (default, free-following) or "x" (axis-locked, Recharts-style)
• New tooltipMode prop: "all" (default) or "single" (nearest series to cursor)
• New tooltipMaxItems prop: caps rows in "all" mode with +N more footer (default 10)
• Date formatted with Intl.DateTimeFormat (locale-aware) instead of ISO string
• Values sorted descending; fallback formatter avoids scientific notation

Banner: replace dark: Tailwind variants with new kumo-banner-info and kumo-banner-warning semantic tokens so dark-mode opacity is baked into the design system. No visual change.

fix(styles): show pointer cursor on clickable Kumo elements by default

Adds a global cursor: pointer rule scoped to elements rendered by Kumo components, identified by the new data-kumo-component and data-kumo-part attributes. Interactive component roots and parts now opt into the rule by setting these attributes, which gives the library a stable scoping primitive that doesn't couple to Tailwind class names.

Components updated to set data-kumo-component / data-kumo-part: Button, LinkButton, Link, Checkbox, Radio, Switch, Select (trigger, option), DropdownMenu (item, link-item, checkbox-item, radio-item, submenu-trigger), Combobox (trigger, item, clear, chip-remove), Autocomplete (item), Dialog (trigger, close), Popover (trigger), Tabs (tab), Collapsible (trigger, default-trigger), Breadcrumbs (link), TableOfContents (item, group-link), Sidebar (menu-button, menu-sub-button, trigger, rail), MenuBar (option), Toast (close), SensitiveInput (toggle-visibility, copy, masked-container).

fix(sidebar): collapsed state styling, transitions, and sliding views

Add flex items-center to ComboboxBase.Icon in TriggerInput for consistency with TriggerValue and Select

Fix Select placeholder not showing when renderValue is provided and the value is empty.

Update semantic color tokens to better represent status icons and indicators:

• Adjust status token values in the theme generator and refresh generated theme output
• Update toast and badge status background treatments
• Update docs to reflect new tint token usage

Adjust toast visual styling for improved readability and emphasis: increase background tint intensity for success/warning/info variants, refine description text contrast, and update close-button icon contrast.

Fixed vertical alignment of checkbox and radio indicators with multi-line labels.

When label text wrapped to multiple lines, the indicators were vertically centered against the entire text block. They now align to the top, sitting next to the first line of text.

echarts is now an optional peer dependency. If you don't use Chart components (Chart, TimeseriesChart, SankeyChart), it will no longer be installed automatically. If you do use them, run npm install echarts (as documented).

Added Badge dot styling as a new variant for indicators that need a subtle visual cue. Updated badge docs and demo examples to reflect the new badge variant and dot-style behavior.

Update Base UI to 1.5.0.

Fix InputGroup focus ring thickness and color: container mode uses 1.5px ring (wraps entire group including buttons), hybrid container zone and individual mode use 1px ring (thin to avoid colliding with adjacent buttons), and all modes use ring-kumo-focus/50 (50% opacity) to match the standalone Input component.

Fix error state red border on Combobox, Select, Autocomplete, and SensitiveInput to match Input behavior

Add inline label layout and fix auto-assigned node colors in tooltips

Fix Tooltip popup overflowing viewport when content is wider than available space. The popup now constrains its width to var(--available-width), a CSS variable provided by Base UI's Positioner that reflects the space between the trigger and the viewport edge.

Fix language alias normalization in ShikiProvider

• Add normalizeLanguage() function that maps common language aliases (js, ts, sh, yml, py, md, gql) to their canonical SupportedLanguage names
• Normalize language aliases in ShikiProvider when preloading grammars, so passing ['js', 'ts'] works the same as ['javascript', 'typescript']
• Normalize language aliases in highlight() hook at runtime, so code fences using js or ts highlight correctly without warnings
• Export normalizeLanguage from @cloudflare/kumo/code for consumers who need to normalize aliases themselves
• Intentionally omit mdx alias since MDX has a distinct grammar that would lose JSX highlighting if mapped to markdown