Kumo

Checked 2026-10-13 against official website, documentation and repository. MIT source. Install @cloudflare/kumo plus React, React DOM and @phosphor-icons/react. Import components individually or from the package; Tailwind users must include its source directive and styles before Tailwind, while a standalone compiled stylesheet is available for non-Tailwind applications. Follow the documented app-root isolation guidance for portaled overlays. Higher-level blocks use a source-owning CLI workflow. Editorial: useful for dense product dashboards and administrative interfaces that need a consistent styled layer over Base UI; not the same library identity as Base UI. Accessibility behavior is vendor-documented, not independently audited. The homepage is a component workbench, not a marketing hero. The mobile nested-scroller flag is an off-canvas navigation panel (x=-288px, width=287px), not hidden gallery content. No application integration or independent accessibility audit performed.