shadcn/ui

src/
├── components/ui/
│   └── button.tsx        # Example component with variants
├── lib/
│   └── utils.ts          # cn() helper for Tailwind classes
└── styles/
    └── globals.css       # Tailwind setup

components.json           # shadcn CLI configuration
postcss.config.mjs        # PostCSS config for Tailwind

# Turborepo only:
packages/ui/
├── src/components/ui/
├── package.json          # @repo/ui with exports
└── postcss.config.mjs

import { type ClassValue, clsx } from 'clsx';
import { twMerge } from 'tailwind-merge';

export function cn(...inputs: ClassValue[]) {
  return twMerge(clsx(inputs));
}

import { Slot } from '@radix-ui/react-slot';
import { type VariantProps, cva } from 'class-variance-authority';
import type * as React from 'react';
import { cn } from '@/lib/utils';

const buttonVariants = cva(
  "cursor-pointer inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-all disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg:not([class*='size-'])]:size-4 shrink-0 [&_svg]:shrink-0 outline-none focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive",
  {
    variants: {
      variant: {
        default: 'bg-primary text-primary-foreground shadow-xs hover:bg-primary/90',
        destructive: 'bg-destructive text-white shadow-xs hover:bg-destructive/90 focus-visible:ring-destructive/20 dark:focus-visible:ring-destructive/40 dark:bg-destructive/60',
        outline: 'border bg-background shadow-xs hover:bg-accent hover:text-accent-foreground dark:bg-input/30 dark:border-input dark:hover:bg-input/50',
        secondary: 'bg-secondary text-secondary-foreground shadow-xs hover:bg-secondary/80',
        ghost: 'hover:bg-accent hover:text-accent-foreground dark:hover:bg-accent/50',
        link: 'text-primary underline-offset-4 hover:underline',
      },
      size: {
        default: 'h-9 px-4 py-2 has-[>svg]:px-3',
        sm: 'h-8 rounded-md gap-1.5 px-3 has-[>svg]:px-2.5',
        lg: 'h-10 rounded-md px-6 has-[>svg]:px-4',
        icon: 'size-9',
      },
    },
    defaultVariants: {
      variant: 'default',
      size: 'default',
    },
  },
);

function Button({
  className,
  variant,
  size,
  asChild = false,
  ...props
}: React.ComponentProps<'button'> &
  VariantProps<typeof buttonVariants> & {
    asChild?: boolean;
  }) {
  const Comp = asChild ? Slot : 'button';

  return <Comp data-slot='button' className={cn(buttonVariants({ variant, size, className }))} {...props} />;
}

export { Button, buttonVariants };

{
  "$schema": "https://ui.shadcn.com/schema.json",
  "style": "new-york",
  "rsc": true,
  "tsx": true,
  "tailwind": {
    "config": "",
    "css": "src/styles/globals.css",
    "baseColor": "neutral",
    "cssVariables": true
  },
  "iconLibrary": "lucide",
  "aliases": {
    "components": "@/components",
    "hooks": "@/hooks",
    "lib": "@/lib",
    "utils": "src/lib/utils"
  }
}