# shadcn/ui Component Reference

Complete catalog of shadcn/ui components with usage patterns and installation.

## Installation

**Add specific components:**
```bash
npx shadcn@latest add button
npx shadcn@latest add button card dialog  # Multiple
npx shadcn@latest add --all              # All components
```

Components install to `components/ui/` with automatic dependency management.

## Form & Input Components

### Button
```tsx
import { Button } from "@/components/ui/button"

<Button variant="default">Default</Button>
<Button variant="destructive">Delete</Button>
<Button variant="outline" size="sm">Small Outline</Button>
<Button variant="ghost" size="icon"><Icon /></Button>
<Button variant="link">Link Style</Button>
```

Variants: `default | destructive | outline | secondary | ghost | link`
Sizes: `default | sm | lg | icon`

### Input
```tsx
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"

<div className="space-y-2">
  <Label htmlFor="email">Email</Label>
  <Input id="email" type="email" placeholder="you@example.com" />
</div>
```

### Form (with React Hook Form + Zod)
```tsx
import { useForm } from "react-hook-form"
import { zodResolver } from "@hookform/resolvers/zod"
import * as z from "zod"
import { Form, FormControl, FormField, FormItem, FormLabel, FormMessage } from "@/components/ui/form"
import { Input } from "@/components/ui/input"
import { Button } from "@/components/ui/button"

const schema = z.object({
  username: z.string().min(2).max(50),
  email: z.string().email()
})

function ProfileForm() {
  const form = useForm({
    resolver: zodResolver(schema),
    defaultValues: { username: "", email: "" }
  })

  return (
    <Form {...form}>
      <form onSubmit={form.handleSubmit(console.log)} className="space-y-8">
        <FormField control={form.control} name="username" render={({ field }) => (
          <FormItem>
            <FormLabel>Username</FormLabel>
            <FormControl>
              <Input placeholder="shadcn" {...field} />
            </FormControl>
            <FormMessage />
          </FormItem>
        )} />
        <Button type="submit">Submit</Button>
      </form>
    </Form>
  )
}
```

### Select
```tsx
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select"

<Select>
  <SelectTrigger className="w-[180px]">
    <SelectValue placeholder="Theme" />
  </SelectTrigger>
  <SelectContent>
    <SelectItem value="light">Light</SelectItem>
    <SelectItem value="dark">Dark</SelectItem>
    <SelectItem value="system">System</SelectItem>
  </SelectContent>
</Select>
```

### Checkbox
```tsx
import { Checkbox } from "@/components/ui/checkbox"
import { Label } from "@/components/ui/label"

<div className="flex items-center space-x-2">
  <Checkbox id="terms" />
  <Label htmlFor="terms">Accept terms</Label>
</div>
```

### Radio Group
```tsx
import { RadioGroup, RadioGroupItem } from "@/components/ui/radio-group"
import { Label } from "@/components/ui/label"

<RadioGroup defaultValue="option-one">
  <div className="flex items-center space-x-2">
    <RadioGroupItem value="option-one" id="option-one" />
    <Label htmlFor="option-one">Option One</Label>
  </div>
  <div className="flex items-center space-x-2">
    <RadioGroupItem value="option-two" id="option-two" />
    <Label htmlFor="option-two">Option Two</Label>
  </div>
</RadioGroup>
```

### Textarea
```tsx
import { Textarea } from "@/components/ui/textarea"

<Textarea placeholder="Type your message here." />
```

### Switch
```tsx
import { Switch } from "@/components/ui/switch"
import { Label } from "@/components/ui/label"

<div className="flex items-center space-x-2">
  <Switch id="airplane-mode" />
  <Label htmlFor="airplane-mode">Airplane Mode</Label>
</div>
```

### Date Picker
```tsx
import { Calendar } from "@/components/ui/calendar"
import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover"
import { Button } from "@/components/ui/button"
import { CalendarIcon } from "lucide-react"
import { format } from "date-fns"
import { useState } from "react"

const [date, setDate] = useState<Date>()

<Popover>
  <PopoverTrigger asChild>
    <Button variant="outline">
      <CalendarIcon className="mr-2 h-4 w-4" />
      {date ? format(date, "PPP") : "Pick a date"}
    </Button>
  </PopoverTrigger>
  <PopoverContent className="w-auto p-0">
    <Calendar mode="single" selected={date} onSelect={setDate} />
  </PopoverContent>
</Popover>
```

## Layout & Navigation

### Card
```tsx
import { Card, CardContent, CardDescription, CardFooter, CardHeader, CardTitle } from "@/components/ui/card"

<Card>
  <CardHeader>
    <CardTitle>Card Title</CardTitle>
    <CardDescription>Card Description</CardDescription>
  </CardHeader>
  <CardContent>
    <p>Card Content</p>
  </CardContent>
  <CardFooter>
    <Button>Action</Button>
  </CardFooter>
</Card>
```

### Tabs
```tsx
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"

<Tabs defaultValue="account">
  <TabsList>
    <TabsTrigger value="account">Account</TabsTrigger>
    <TabsTrigger value="password">Password</TabsTrigger>
  </TabsList>
  <TabsContent value="account">Account settings</TabsContent>
  <TabsContent value="password">Password settings</TabsContent>
</Tabs>
```

### Accordion
```tsx
import { Accordion, AccordionContent, AccordionItem, AccordionTrigger } from "@/components/ui/accordion"

<Accordion type="single" collapsible>
  <AccordionItem value="item-1">
    <AccordionTrigger>Is it accessible?</AccordionTrigger>
    <AccordionContent>
      Yes. It adheres to WAI-ARIA design pattern.
    </AccordionContent>
  </AccordionItem>
  <AccordionItem value="item-2">
    <AccordionTrigger>Is it styled?</AccordionTrigger>
    <AccordionContent>
      Yes. Comes with default styles customizable with Tailwind.
    </AccordionContent>
  </AccordionItem>
</Accordion>
```

### Navigation Menu
```tsx
import { NavigationMenu, NavigationMenuContent, NavigationMenuItem, NavigationMenuLink, NavigationMenuList, NavigationMenuTrigger } from "@/components/ui/navigation-menu"

<NavigationMenu>
  <NavigationMenuList>
    <NavigationMenuItem>
      <NavigationMenuTrigger>Getting Started</NavigationMenuTrigger>
      <NavigationMenuContent>
        <NavigationMenuLink>Introduction</NavigationMenuLink>
        <NavigationMenuLink>Installation</NavigationMenuLink>
      </NavigationMenuContent>
    </NavigationMenuItem>
  </NavigationMenuList>
</NavigationMenu>
```

## Overlays & Dialogs

### Dialog
```tsx
import { Dialog, DialogContent, DialogDescription, DialogHeader, DialogTitle, DialogTrigger } from "@/components/ui/dialog"

<Dialog>
  <DialogTrigger asChild>
    <Button>Open</Button>
  </DialogTrigger>
  <DialogContent>
    <DialogHeader>
      <DialogTitle>Are you sure?</DialogTitle>
      <DialogDescription>This action cannot be undone.</DialogDescription>
    </DialogHeader>
  </DialogContent>
</Dialog>
```

### Drawer
```tsx
import { Drawer, DrawerClose, DrawerContent, DrawerDescription, DrawerFooter, DrawerHeader, DrawerTitle, DrawerTrigger } from "@/components/ui/drawer"

<Drawer>
  <DrawerTrigger>Open</DrawerTrigger>
  <DrawerContent>
    <DrawerHeader>
      <DrawerTitle>Title</DrawerTitle>
      <DrawerDescription>Description</DrawerDescription>
    </DrawerHeader>
    <DrawerFooter>
      <Button>Submit</Button>
      <DrawerClose>Cancel</DrawerClose>
    </DrawerFooter>
  </DrawerContent>
</Drawer>
```

### Popover
```tsx
import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover"

<Popover>
  <PopoverTrigger>Open</PopoverTrigger>
  <PopoverContent>Content here</PopoverContent>
</Popover>
```

### Toast
```tsx
import { useToast } from "@/hooks/use-toast"
import { Button } from "@/components/ui/button"

const { toast } = useToast()

<Button onClick={() => {
  toast({
    title: "Scheduled: Catch up",
    description: "Friday, February 10, 2023 at 5:57 PM"
  })
}}>
  Show Toast
</Button>
```

### Command
```tsx
import { Command, CommandEmpty, CommandGroup, CommandInput, CommandItem, CommandList } from "@/components/ui/command"

<Command>
  <CommandInput placeholder="Type a command or search..." />
  <CommandList>
    <CommandEmpty>No results found.</CommandEmpty>
    <CommandGroup heading="Suggestions">
      <CommandItem>Calendar</CommandItem>
      <CommandItem>Search Emoji</CommandItem>
      <CommandItem>Calculator</CommandItem>
    </CommandGroup>
  </CommandList>
</Command>
```

### Alert Dialog
```tsx
import { AlertDialog, AlertDialogAction, AlertDialogCancel, AlertDialogContent, AlertDialogDescription, AlertDialogFooter, AlertDialogHeader, AlertDialogTitle, AlertDialogTrigger } from "@/components/ui/alert-dialog"

<AlertDialog>
  <AlertDialogTrigger asChild>
    <Button variant="destructive">Delete</Button>
  </AlertDialogTrigger>
  <AlertDialogContent>
    <AlertDialogHeader>
      <AlertDialogTitle>Absolutely sure?</AlertDialogTitle>
      <AlertDialogDescription>
        This permanently deletes your account and removes data from servers.
      </AlertDialogDescription>
    </AlertDialogHeader>
    <AlertDialogFooter>
      <AlertDialogCancel>Cancel</AlertDialogCancel>
      <AlertDialogAction>Continue</AlertDialogAction>
    </AlertDialogFooter>
  </AlertDialogContent>
</AlertDialog>
```

## Feedback & Status

### Alert
```tsx
import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert"

<Alert>
  <AlertTitle>Heads up!</AlertTitle>
  <AlertDescription>You can add components using CLI.</AlertDescription>
</Alert>

<Alert variant="destructive">
  <AlertTitle>Error</AlertTitle>
  <AlertDescription>Session expired. Please log in.</AlertDescription>
</Alert>
```

### Progress
```tsx
import { Progress } from "@/components/ui/progress"

<Progress value={33} />
```

### Skeleton
```tsx
import { Skeleton } from "@/components/ui/skeleton"

<div className="flex items-center space-x-4">
  <Skeleton className="h-12 w-12 rounded-full" />
  <div className="space-y-2">
    <Skeleton className="h-4 w-[250px]" />
    <Skeleton className="h-4 w-[200px]" />
  </div>
</div>
```

## Display Components

### Table
```tsx
import { Table, TableBody, TableCaption, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table"

<Table>
  <TableCaption>Recent invoices</TableCaption>
  <TableHeader>
    <TableRow>
      <TableHead>Invoice</TableHead>
      <TableHead>Status</TableHead>
      <TableHead>Amount</TableHead>
    </TableRow>
  </TableHeader>
  <TableBody>
    <TableRow>
      <TableCell>INV001</TableCell>
      <TableCell>Paid</TableCell>
      <TableCell>$250.00</TableCell>
    </TableRow>
  </TableBody>
</Table>
```

### Avatar
```tsx
import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar"

<Avatar>
  <AvatarImage src="https://github.com/shadcn.png" />
  <AvatarFallback>CN</AvatarFallback>
</Avatar>
```

### Badge
```tsx
import { Badge } from "@/components/ui/badge"

<Badge>Default</Badge>
<Badge variant="secondary">Secondary</Badge>
<Badge variant="destructive">Destructive</Badge>
<Badge variant="outline">Outline</Badge>
```