Imported from homeslands/trend-ui (app/order-ui/src/.claude/skills/ui-components/SKILL.md). Install upstream with npx skills add homeslands/trend-ui --skill ui-components. Copyright stays with the author.

UI Components Library

This project has a comprehensive shared component library in components/ organized by category. Always check here before creating new UI elements.

Core UI Components

Button

File: components/ui/button.tsx

import { Button } from '@/components/ui/button'

// Basic usage
<Button onPress={handlePress}>Submit</Button>

// With variant
<Button variant="secondary" size="lg">
  Secondary Button
</Button>

// Loading state
<Button loading={isLoading} disabled={isLoading}>
  Submit
</Button>

// Custom styling
<Button className="w-full rounded-lg">Full Width</Button>

Props:

interface ButtonProps {
  variant?: 'default' | 'secondary' | 'outline' | 'destructive' | 'ghost'
  size?: 'sm' | 'md' | 'lg' | 'icon'
  loading?: boolean
  disabled?: boolean
  children?: React.ReactNode
  onPress?: () => void
  className?: string
}

Variants:

• default — Black button, white text
• secondary — Gray background, dark text
• outline — Border only, transparent bg
• destructive — Red button for delete/cancel
• ghost — Transparent, text only

Input

File: components/ui/input.tsx

import { Input } from '@/components/ui/input'

// Basic
<Input placeholder="Enter email" />

// With error state
<Input
  placeholder="Password"
  error={!!formError}
  secureTextEntry
/>

// Custom className
<Input
  className="h-14 text-lg"
  placeholderTextColor="#999"
/>

Props:

interface InputProps extends TextInput.Props {
  error?: boolean
  className?: string
}

Card

File: components/ui/card.tsx

import { Card } from '@/components/ui/card'

;<Card className="p-4">
  <Text className="text-lg font-semibold">Card Title</Text>
  <Text className="mt-2 text-sm text-muted-foreground">
    Card content goes here
  </Text>
</Card>

Variants: Default is white/light with shadow.

Badge

File: components/ui/badge.tsx

import { Badge } from '@/components/ui/badge'

// Default
<Badge>New</Badge>

// With variant
<Badge variant="secondary">Secondary</Badge>
<Badge variant="destructive">Deleted</Badge>

Variants: default, secondary, destructive, outline

Sheet

File: components/ui/sheet.tsx

Bottom sheet modal for selections:

import { Sheet } from '@/components/ui/sheet'

;<Sheet open={open} onOpenChange={setOpen}>
  <SheetContent>
    <SheetHeader>
      <SheetTitle>Select Option</SheetTitle>
    </SheetHeader>
    <View className="gap-3 p-4">
      <Pressable onPress={() => selectOption('opt1')}>
        <Text>Option 1</Text>
      </Pressable>
      {/* More options */}
    </View>
  </SheetContent>
</Sheet>

Dialog

File: components/ui/dialog.tsx or components/dialog/

import { Dialog } from '@/components/dialog'

;<Dialog open={showConfirm} onOpenChange={setShowConfirm}>
  <DialogContent>
    <DialogHeader>
      <DialogTitle>Confirm Action</DialogTitle>
    </DialogHeader>
    <Text>Are you sure?</Text>
    <DialogFooter>
      <Button variant="outline" onPress={handleCancel}>
        Cancel
      </Button>
      <Button onPress={handleConfirm}>Confirm</Button>
    </DialogFooter>
  </DialogContent>
</Dialog>

Specialized Components

Quantity Selector

File: components/button/quantity-selector.tsx

import { QuantitySelector } from '@/components/button'

;<QuantitySelector
  value={quantity}
  onValueChange={setQuantity}
  min={1}
  max={10}
/>

Price Tag

File: components/menu/price-tag.tsx

import { PriceTag } from '@/components/menu/price-tag'

;<PriceTag price={29.99} discountedPrice={19.99} />

Favorite Button

File: components/menu/favorite-button.tsx

import { FavoriteButton } from '@/components/menu'

;<FavoriteButton isFavorite={isFav} onPress={toggleFavorite} />

Skeleton Loaders

File: components/ui/skeleton.tsx & components/skeletons/

import { Skeleton } from '@/components/ui/skeleton'
import { MenuItemSkeletonShell } from '@/components/skeletons'

// Generic skeleton
<Skeleton className="h-10 w-full rounded-lg" />

// Specific shells
<MenuItemSkeletonShell />
<ScreenShellSkeleton />

Loading Overlay

File: components/ui/global-loading-overlay.tsx

Automatically shown during slow navigation (if QueryClient cache misses).

No manual usage needed — managed by navigation engine.

Form Components

Form Input Wrapper

File: components/form/form-input.tsx

Integrates with React Hook Form:

import { FormInput } from '@/components/form'

;<FormInput
  control={form.control}
  name="email"
  label="Email"
  placeholder="Enter email"
  rules={{ required: 'Email is required' }}
/>

OTP Input

File: components/auth/otp-input.tsx

import { OtpInput } from '@/components/auth'

;<OtpInput value={otp} onValueChange={setOtp} length={6} />

Password Rules Input

File: components/input/password-rules-input.tsx

Shows password strength requirements:

import { PasswordRulesInput } from '@/components/input'

;<PasswordRulesInput value={password} onChangeText={setPassword} />

Navigation Components

Animated Tab Button

File: components/navigation/animated-tab-button.tsx

Used in bottom tab bar — don't use directly.

Tab Button

File: components/navigation/tab-button.tsx

Custom tab button with icon + label.

Navigate Pressable

File: components/navigation/navigate-pressable.tsx

Pressable that handles navigation + prefetch:

import { NavigatePressable } from '@/components/navigation'

;<NavigatePressable
  to="/(tabs)/menu"
  params={{ menuId: 123 }}
  disabled={isLoading}
>
  <Text>Go to Menu</Text>
</NavigatePressable>

Data Display Components

Data Table

File: components/ui/data-table/

Complex table component for web/desktop:

import { DataTable } from '@/components/ui/data-table'

;<DataTable columns={columns} data={data} pagination={true} search={true} />

Carousel

File: components/ui/carousel.tsx

For image galleries:

import { Carousel } from '@/components/ui/carousel'

;<Carousel
  data={images}
  renderItem={({ item }) => <Image source={{ uri: item.url }} />}
/>

Product Image Carousel

File: components/menu/product-image-carousel.tsx

Optimized for product images with zoom:

import { ProductImageCarousel } from '@/components/menu'

;<ProductImageCarousel images={product.images} />

Selection Components

Select / Dropdown

Files: components/select/ & components/dropdown/

import { Select } from '@/components/select'

;<Select
  options={[
    { label: 'Option 1', value: '1' },
    { label: 'Option 2', value: '2' },
  ]}
  value={selected}
  onValueChange={setSelected}
  placeholder="Choose..."
/>

Product Variant Select

File: components/select/product-variant-select.tsx

For size/color/flavor selection:

import { ProductVariantSelect } from '@/components/select'

;<ProductVariantSelect
  variants={product.variants}
  onSelect={setSelectedVariant}
/>

Table Select Sheet

File: components/select/table-select-sheet.tsx

For selecting dine-in tables:

import { TableSelectSheet } from '@/components/select'

;<TableSelectSheet tables={availableTables} onSelect={selectTable} />

Auth Components

Login Form

File: components/auth/login-form.tsx

import { LoginForm } from '@/components/auth'

;<LoginForm onSuccess={handleLoginSuccess} />

Auth Form Layout

File: components/auth/auth-form-layout.tsx

Wrapper for auth screens.

Cart Components

Located in components/cart/:

• cart-content.tsx — Main cart list
• cart-item-row.tsx — Individual item row
• cart-empty.tsx — Empty state
• cart-footer.tsx — Total + checkout button
• cart-swipeable.tsx — Swipe-to-delete
• cart-voucher-sheet.tsx — Voucher application
• cart-size-sheet.tsx — Size/variant selection
• voucher-card.tsx — Voucher display
• voucher-condition-modal.tsx — Voucher details

Profile Components

Located in components/profile/:

• profile-header.tsx — User info section
• info-card.tsx — Info display card
• birthday-picker.tsx — Date picker
• settings-item.tsx — Settings option row
• logout-confirm-bottom-sheet.tsx — Logout confirmation

Common Composition Patterns

Form Pattern

import { Button } from '@/components/ui/button'
import { FormInput } from '@/components/form'
import { useZodForm } from '@/hooks'

const schema = z.object({
  email: z.string().email(),
  password: z.string().min(6),
})

export function LoginScreen() {
  const form = useZodForm({ schema })

  const onSubmit = form.handleSubmit(async (data) => {
    await login(data)
  })

  return (
    <View className="flex-1 p-4">
      <FormInput control={form.control} name="email" placeholder="Email" />
      <FormInput
        control={form.control}
        name="password"
        placeholder="Password"
        secureTextEntry
      />
      <Button onPress={onSubmit} className="mt-4">
        Login
      </Button>
    </View>
  )
}

List Item Pattern

import { useCallback, memo } from 'react'
import { FlashList } from '@shopify/flash-list'
import { Pressable, useColorScheme } from 'react-native'

// ✅ Extract renderItem to a memoized component outside the list parent.
// This prevents the component from being recreated on every parent render.
// Pass isDark as a prop instead of calling useColorScheme() inside the item
// to avoid hook overhead in recycled cells.
const OrderItem = memo(
  ({
    item,
    onPress,
    isDark,
  }: {
    item: IOrder
    onPress: (id: string) => void
    isDark: boolean
  }) => (
    <Pressable onPress={() => onPress(item.id)}>
      <View className="border-b border-border p-3">
        <Text className="font-semibold text-foreground">{item.id}</Text>
        {/* text-muted-foreground = --muted-foreground token from global.css */}
        <Text className="text-sm text-muted-foreground">
          {item.total.toLocaleString('vi-VN')}đ
        </Text>
      </View>
    </Pressable>
  ),
)

export function OrderList({ orders }: { orders: IOrder[] }) {
  const isDark = useColorScheme() === 'dark'

  const handlePress = useCallback((orderId: string) => {
    router.push({ pathname: '/payment/[order]', params: { order: orderId } })
  }, [])

  const renderItem = useCallback(
    ({ item }: { item: IOrder }) => (
      <OrderItem item={item} onPress={handlePress} isDark={isDark} />
    ),
    [handlePress, isDark],
  )

  return (
    <FlashList
      data={orders}
      renderItem={renderItem}
      keyExtractor={(item) => item.id}
      estimatedItemSize={68} // measure actual rendered height, don't guess
    />
  )
}

Modal/Sheet Pattern

import { Sheet } from '@/components/ui/sheet'
import { Button } from '@/components/ui/button'

export function ConfirmDialog({
  open,
  onOpenChange,
  onConfirm,
}: {
  open: boolean
  onOpenChange: (open: boolean) => void
  onConfirm: () => void
}) {
  return (
    <Sheet open={open} onOpenChange={onOpenChange}>
      <SheetContent>
        <SheetHeader>
          <SheetTitle>Confirm</SheetTitle>
        </SheetHeader>
        <Text className="my-4">Are you sure?</Text>
        <View className="flex-row gap-3">
          <Button
            variant="outline"
            className="flex-1"
            onPress={() => onOpenChange(false)}
          >
            Cancel
          </Button>
          <Button
            className="flex-1"
            onPress={() => {
              onConfirm()
              onOpenChange(false)
            }}
          >
            Confirm
          </Button>
        </View>
      </SheetContent>
    </Sheet>
  )
}

Creating New Components

Checklist

Before creating a new component:

1. Search existing components — Is something similar already built?
2. Use composition — Can it be built from existing components?
3. Atomic design — Keep it small, focused, reusable
4. Document props — Clear interface with TypeScript
5. Export from barrel — Add to index.tsx in folder
6. Test dark mode — Use useColorScheme() if needed
7. Optimize rendering — Use React.memo() for list items

Component Template

// components/[category]/MyComponent.tsx
import React, { useCallback } from 'react'
import { View, Text, Pressable, useColorScheme } from 'react-native'
import { cn } from '@/utils/cn'

export interface MyComponentProps {
  title: string
  onPress?: () => void
  variant?: 'default' | 'secondary'
  disabled?: boolean
  className?: string
}

export const MyComponent = React.forwardRef<View, MyComponentProps>(
  (
    { title, onPress, variant = 'default', disabled = false, className },
    ref,
  ) => {
    const isDark = useColorScheme() === 'dark'

    const handlePress = useCallback(() => {
      if (!disabled && onPress) {
        onPress()
      }
    }, [disabled, onPress])

    return (
      <Pressable
        ref={ref}
        onPress={handlePress}
        disabled={disabled}
        className={cn(
          'rounded-lg px-4 py-3',
          variant === 'default' && 'bg-primary',
          variant === 'secondary' && 'bg-gray-200 dark:bg-gray-700',
          disabled && 'opacity-50',
          className,
        )}
      >
        <Text className="text-center font-semibold text-white">{title}</Text>
      </Pressable>
    )
  },
)

MyComponent.displayName = 'MyComponent'

// components/[category]/index.tsx
export { MyComponent, type MyComponentProps } from './MyComponent'

Accessibility

Always include:

<Pressable
  accessibilityRole="button"
  accessibilityLabel="Submit form"
  testID="submit-button"
>
  <Text>Submit</Text>
</Pressable>

Dark Mode Support

NativeWind dark: prefix is the preferred approach — no hook needed:

// ✅ Preferred: Tailwind dark: prefix (zero hook overhead)
<View className="bg-white dark:bg-gray-900">
  <Text className="text-foreground">Auto theme</Text>
  <Text className="text-muted-foreground">Subtitle</Text>
</View>

// ✅ When you need the value imperatively (native props, colors constant)
import { useColorScheme } from 'react-native'
import { colors } from '@/constants/colors.constant'

const isDark = useColorScheme() === 'dark'
<ActivityIndicator color={isDark ? colors.primary.dark : colors.primary.light} />

// ⚠️ Avoid calling useColorScheme() inside FlashList renderItem components.
// Call it in the parent list and pass isDark as a prop to avoid
// re-running the hook in every recycled cell.

// ❌ Static/header layouts — use STATIC_TOP_INSET, not hooks
// (see CLAUDE.md Layout Conventions)

Rule: Before creating any new UI element, check the existing components. Composition > creation.