Kanpeki
Kanpeki is a copy-paste component library for React. Components are copied into your project (not installed as npm packages) via the shadcn CLI. Built on React Aria Components (accessibility), CVA beta (variants), and Tailwind CSS 4.1 (styling).
Docs: https://kanpeki.vercel.app
Quick Start
Install dependencies, create ~/lib/cva.ts, configure globals.css, then add components:
npx shadcn@latest add @kanpeki/button
Components are copied to ~/components/ui/<name>/. You own the code.
See references/installation-setup.md for full setup (deps, CVA config, globals.css, dark mode, path alias).
Component Architecture
Each component has: index.ts (exports), <name>.tsx (implementation), styles.ts (CVA variants).
- Simple components — single export:
import { Button } from "~/components/ui/button" - Multi-part components — namespace exports:
import { Dialog } from "~/components/ui/dialog"→Dialog.Root,Dialog.Content, etc.
Multi-part components: Accordion, Breadcrumb, ButtonGroup, Calendar, Card, Carousel, Chart, Combobox, DateField, DatePicker, Dialog, Drawer, Field, InputGroup, ListBox, Menu, NumberField, Pagination, Popover, RadioGroup, Resizable, ScrollArea, SearchField, Select, Sheet, Sidebar, Slider, Table, Tabs, Toast, ToggleGroup, Tooltip.
Key rule: Always use composeRenderProps from react-aria-components on React Aria primitives — required for state selectors (pressed:, selected:, etc.). For plain HTML elements, call CVA directly.
See references/component-patterns.md for full examples (Button, Dialog, namespace pattern, customization).
Form System
3-layer architecture: Form > Field > Input component.
Field.Root's render prop connects to a React Aria form primitive (TextField, Select, NumberField, etc.) for automatic label association and validation.
Form Library Integration
- Determine the form library:
- React Hook Form? → See references/form-react-hook-form.md
- TanStack Form? → See references/form-tanstack-form.md
- Native HTML validation only? → Use React Aria
<Form>+isRequiredon primitives
All libraries use the same Field.Root render={<Primitive>} pattern. Field.Error accepts an errors prop — undefined entries are silently ignored.
See references/form-system.md for Field/InputGroup/ButtonGroup API details.
Styling & Theming
- CVA — variant definitions in
styles.ts. Importcvafrom~/lib/cva(notcvadirectly). cn()— class merging utility from~/lib/cva. WrapstwMerge.- OKLCH colors — defined in
globals.cssvia@theme inline. Uselight-dark()for automatic dark mode. - Dark mode —
next-themes(class strategy) + CSSlight-dark(). Components auto-switch. - React Aria selectors —
pressed:,selected:,disabled:,entering:,exiting:,focus-visible:. - Animations —
tailwindcss-motionplugin:motion-opacity-in,motion-scale-in-95,motion-duration-200.
Override styles by passing className (twMerge resolves conflicts) or editing styles.ts directly.
See references/styling-and-theming.md for full token reference and CVA deep dive.
Common Pitfalls
| Pitfall | Fix |
|---|---|
Using className={Styles(...)} on React Aria components | Use composeRenderProps — required for state selectors |
Missing "use client" directive | All interactive components need it (React Aria is client-only) |
Importing cva from "cva" | Import from ~/lib/cva — includes twMerge hook |
Old shadcn deps installed (class-variance-authority, clsx) | Remove them, use cva@beta + tailwind-merge |
Using active: for press state | Use pressed: — React Aria prefix |
Using @/ path alias | Kanpeki uses ~/ |
Component List
Install any component: npx shadcn@latest add @kanpeki/<name>
Layout & Structure: card, separator, aspect-ratio, resizable, scroll-area, sidebar, collapsible, carousel
Form Inputs: input, textarea, text-field, number-field, search-field, checkbox, radio-group, select, combobox, autocomplete, switch, slider, date-field, date-picker, calendar, input-otp, dropzone, field, form, input-group
Buttons & Actions: button, button-group, link, link-button, toggle, toggle-group
Overlays: dialog, drawer, sheet, popover, tooltip, menu
Data Display: table, list-box, accordion, tabs, avatar, badge, keyboard, chart
Feedback: alert, toast, progress, spinner, skeleton
Navigation: breadcrumb, pagination
Utilities: label
References
- Installation & Setup — full CSS, CVA config, dark mode, path alias
- Component Patterns — Button + Dialog examples, namespace pattern, customization
- Form System — Field/InputGroup/ButtonGroup API, native HTML validation
- React Hook Form — Controller patterns, all field types (Select, Checkbox, Switch, arrays)
- TanStack Form — form.Field patterns, Zod validation
- Styling & Theming — CVA deep dive, OKLCH tokens, React Aria selectors, animations