# Button Group

A row or column of related buttons joined into one control.

Button Group is an open-source mobile component from suiss/uim for React Native and Expo, with SwiftUI and Jetpack Compose versions built from the same design tokens. The @esuiss/uim CLI copies its source into your project, so you own the code.

Source: https://uim.suiss.app/docs/components/button-group

![Preview](https://uim.suiss.app/previews/components-button-group--default.light.webp)

```tsx
import { ArchiveIcon, ArrowLeftIcon, CalendarPlusIcon, ClockIcon, DotsThreeIcon, ListPlusIcon, TagIcon, TrashIcon } from "phosphor-react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup, ButtonGroupSeparator } from "@/components/ui/button-group"
import { DropdownMenu, DropdownMenuContent, DropdownMenuGroup, DropdownMenuItem, DropdownMenuSeparator, DropdownMenuTrigger } from "@/components/ui/dropdown-menu"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"

function MailMenuContent() {
  return (
    <DropdownMenuContent align="end" className="w-52">
      <DropdownMenuGroup>
        <DropdownMenuItem>
          <Icon as={ListPlusIcon} className="size-4" />
          <Text>Mark as read</Text>
        </DropdownMenuItem>
        <DropdownMenuItem>
          <Icon as={ArchiveIcon} className="size-4" />
          <Text>Archive</Text>
        </DropdownMenuItem>
      </DropdownMenuGroup>
      <DropdownMenuSeparator />
      <DropdownMenuGroup>
        <DropdownMenuItem>
          <Icon as={ClockIcon} className="size-4" />
          <Text>Snooze</Text>
        </DropdownMenuItem>
        <DropdownMenuItem>
          <Icon as={CalendarPlusIcon} className="size-4" />
          <Text>Add to calendar</Text>
        </DropdownMenuItem>
        <DropdownMenuItem>
          <Icon as={TagIcon} className="size-4" />
          <Text>Label as</Text>
        </DropdownMenuItem>
      </DropdownMenuGroup>
      <DropdownMenuSeparator />
      <DropdownMenuGroup>
        <DropdownMenuItem variant="destructive">
          <Icon as={TrashIcon} className="size-4" />
          <Text>Trash</Text>
        </DropdownMenuItem>
      </DropdownMenuGroup>
    </DropdownMenuContent>
  )
}

export function ButtonGroupExample() {
  return (
    <ButtonGroup>
      <ButtonGroup>
        <Button variant="secondary" size="icon" accessibilityLabel="Go back">
          <Icon as={ArrowLeftIcon} />
        </Button>
      </ButtonGroup>
      <ButtonGroup>
        <Button variant="secondary">
          <Text>Archive</Text>
        </Button>
        <ButtonGroupSeparator />
        <Button variant="secondary">
          <Text>Report</Text>
        </Button>
      </ButtonGroup>
      <ButtonGroup>
        <Button variant="secondary">
          <Text>Snooze</Text>
        </Button>
        <ButtonGroupSeparator />
        <DropdownMenu>
          <DropdownMenuTrigger
            accessibilityLabel="More options"
            render={<Button variant="secondary" size="icon" />}
          >
            <Icon as={DotsThreeIcon} />
          </DropdownMenuTrigger>
          <MailMenuContent />
        </DropdownMenu>
      </ButtonGroup>
    </ButtonGroup>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupExample: View {
  var body: some View {
    ButtonGroup {
      ButtonGroup {
        ButtonGroupIconButton(icon: Ph.arrowLeft.regular, label: "Go back", variant: .secondary)
      }
      ButtonGroup {
        Button("Archive") {}.buttonStyle(.variant(.secondary))
        ButtonGroupSeparator()
        Button("Report") {}.buttonStyle(.variant(.secondary))
      }
      ButtonGroup {
        Button("Snooze") {}.buttonStyle(.variant(.secondary))
        ButtonGroupSeparator()
        ButtonGroupMailMenu(variant: .secondary)
      }
    }
  }
}

struct ButtonGroupIcon: View {
  let icon: Image
  let size: VariantButtonStyle.Size

  var body: some View {
    icon.frame(width: size.iconSize, height: size.iconSize)
  }
}

struct ButtonGroupIconButton: View {
  let icon: Image
  let label: LocalizedStringKey
  let variant: VariantButtonStyle.Variant
  var size: VariantButtonStyle.Size = .icon

  var body: some View {
    Button {} label: {
      ButtonGroupIcon(icon: icon, size: size)
    }
    .buttonStyle(.variant(variant, size: size))
    .accessibilityLabel(Text(label))
  }
}

struct ButtonGroupMailMenu: View {
  let variant: VariantButtonStyle.Variant

  var body: some View {
    DropdownMenu(align: .end) {
      DropdownMenuGroup {
        DropdownMenuItem("Mark as read", icon: Ph.listPlus.regular) {}
        DropdownMenuItem("Archive", icon: Ph.archive.regular) {}
      }
      DropdownMenuSeparator()
      DropdownMenuGroup {
        DropdownMenuItem("Snooze", icon: Ph.clock.regular) {}
        DropdownMenuItem("Add to calendar", icon: Ph.calendarPlus.regular) {}
        DropdownMenuItem("Label as", icon: Ph.tag.regular) {}
      }
      DropdownMenuSeparator()
      DropdownMenuGroup {
        DropdownMenuItem("Trash", icon: Ph.trash.regular, variant: .destructive) {}
      }
    } label: {
      ButtonGroupIcon(icon: Ph.dotsThree.bold, size: .icon)
    }
    .buttonStyle(.variant(variant, size: .icon))
    .accessibilityLabel(Text("More options"))
  }
}
```

```kotlin
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.semantics.contentDescription
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Archive
import com.adamglin.phosphoricons.regular.ArrowLeft
import com.adamglin.phosphoricons.regular.CalendarPlus
import com.adamglin.phosphoricons.regular.Clock
import com.adamglin.phosphoricons.regular.DotsThree
import com.adamglin.phosphoricons.regular.ListPlus
import com.adamglin.phosphoricons.regular.Tag
import com.adamglin.phosphoricons.regular.Trash
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonGroupSeparator
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.DropdownMenu
import com.esuiss.ui.components.DropdownMenuGroup
import com.esuiss.ui.components.DropdownMenuItem
import com.esuiss.ui.components.DropdownMenuSeparator
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.MenuItemVariant
import com.esuiss.ui.components.PopupAlign

@Composable
fun ButtonGroupExample() {
    ButtonGroupMail(ButtonVariant.Secondary, separators = true)
}

@Composable
fun ButtonGroupIconButton(
    label: String,
    icon: androidx.compose.ui.graphics.vector.ImageVector,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Icon,
    onClick: () -> Unit = {},
) {
    Button(onClick = onClick, variant = variant, size = size) {
        Icon(icon, contentDescription = label)
    }
}

@Composable
fun ButtonGroupMailMenu(variant: ButtonVariant) {
    var open by rememberSaveable { mutableStateOf(false) }
    DropdownMenu(
        expanded = open,
        onExpandedChange = { open = it },
        trigger = { ButtonGroupIconButton("More options", PhosphorIcons.Regular.DotsThree, variant) { open = true } },
        align = PopupAlign.End,
    ) {
        DropdownMenuGroup {
            DropdownMenuItem("Mark as read", onClick = {}, icon = PhosphorIcons.Regular.ListPlus)
            DropdownMenuItem("Archive", onClick = {}, icon = PhosphorIcons.Regular.Archive)
        }
        DropdownMenuSeparator()
        DropdownMenuGroup {
            DropdownMenuItem("Snooze", onClick = {}, icon = PhosphorIcons.Regular.Clock)
            DropdownMenuItem("Add to calendar", onClick = {}, icon = PhosphorIcons.Regular.CalendarPlus)
            DropdownMenuItem("Label as", onClick = {}, icon = PhosphorIcons.Regular.Tag)
        }
        DropdownMenuSeparator()
        DropdownMenuGroup {
            DropdownMenuItem("Trash", onClick = {}, icon = PhosphorIcons.Regular.Trash, variant = MenuItemVariant.Destructive)
        }
    }
}

@Composable
fun ButtonGroupMail(variant: ButtonVariant, separators: Boolean) {
    ButtonGroup {
        ButtonGroup {
            ButtonGroupIconButton("Go back", PhosphorIcons.Regular.ArrowLeft, variant)
        }
        ButtonGroup {
            Button("Archive", onClick = {}, variant = variant)
            if (separators) ButtonGroupSeparator()
            Button("Report", onClick = {}, variant = variant)
        }
        ButtonGroup {
            Button("Snooze", onClick = {}, variant = variant)
            if (separators) ButtonGroupSeparator()
            ButtonGroupMailMenu(variant)
        }
    }
}
```

`ButtonGroup` is a `View` with the `group` role that joins its children: only the outer ends keep their rounded corners and the shared borders collapse. It works with `Button` and with other controls such as inputs, selects and menu triggers. `ghost` and `plain` buttons are left unjoined.

Nest groups to keep separate clusters in one row with a gap between them. `ButtonGroupSeparator` draws a divider between joined buttons, and `ButtonGroupText` shows a label or icon in the same pill shape.

## Installation

```bash title="Terminal"
npx @esuiss/uim@latest add button-group
```

```bash title="Terminal"
npx @esuiss/uim@latest add button-group --platform swift
```

```bash title="Terminal"
npx @esuiss/uim@latest add button-group --platform kotlin
```

The CLI also adds what it builds on: [Button](/docs/components/button), [Icon](/docs/components/icon), [Separator](/docs/components/separator), [Text](/docs/components/text).

### Manual

**Uniwind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install class-variance-authority cn
```

2. Add the pieces it builds on: [Button](/docs/components/button), [Icon](/docs/components/icon), [Separator](/docs/components/separator), [Text](/docs/components/text), and the primitives `components/primitives/types.tsx`, `components/primitives/use-render.tsx`.

3. Copy the source into `components/ui/button-group.tsx`:

```tsx title="uniwind/components/ui/button-group.tsx"
import { cva, type VariantProps } from "class-variance-authority"
import { cn } from "cn"
import * as React from "react"
import { View, type ViewProps } from "react-native"
import type { ClassNameProp, RenderProp } from "@/components/primitives/types"
import { resolveClassName, useRender } from "@/components/primitives/use-render"
import {
  Button,
  ButtonClassContext,
  type ButtonVariant,
} from "@/components/ui/button"
import { IconClassContext } from "@/components/ui/icon"
import { Separator } from "@/components/ui/separator"
import { TextClassContext } from "@/components/ui/text"

type ButtonGroupOrientation = "horizontal" | "vertical"

const buttonGroupVariants = cva("items-stretch self-start", {
  variants: {
    orientation: {
      horizontal: "flex-row",
      vertical: "flex-col",
    },
  },
  defaultVariants: {
    orientation: "horizontal",
  },
})

function positionClassName(
  orientation: ButtonGroupOrientation,
  first: boolean,
  last: boolean
) {
  if (orientation === "vertical") {
    return cn(
      first ? "rounded-t-2xl" : "rounded-t-none border-t-0",
      last ? "rounded-b-2xl" : "rounded-b-none"
    )
  }
  return cn(
    first ? "rounded-l-full" : "rounded-l-none border-l-0",
    last ? "rounded-r-full" : "rounded-r-none"
  )
}

function joinedButtonClassName(className: string) {
  return (variant: ButtonVariant) =>
    variant === "ghost" || variant === "plain" ? undefined : className
}

function withClassName(child: React.ReactElement, className: string) {
  const element = child as React.ReactElement<{ className?: unknown }>
  const current = element.props.className as ClassNameProp<unknown> | undefined
  return React.cloneElement(element, {
    className:
      typeof current === "function"
        ? (state: unknown) => cn(className, resolveClassName(current, state))
        : cn(className, current),
  })
}

function ButtonGroup({
  className,
  orientation = "horizontal",
  children,
  ...props
}: ViewProps & VariantProps<typeof buttonGroupVariants>) {
  const resolved = orientation ?? "horizontal"
  const items = React.Children.toArray(children).filter(React.isValidElement)
  const nested = items.some((child) => child.type === ButtonGroup)
  return (
    <View
      role="group"
      className={cn(
        buttonGroupVariants({ orientation }),
        nested && "gap-2",
        className
      )}
      {...props}
    >
      {items.map((child, index) => {
        if (child.type === ButtonGroup || child.type === ButtonGroupSeparator) {
          return (
            <ButtonClassContext.Provider key={child.key} value={undefined}>
              {child}
            </ButtonClassContext.Provider>
          )
        }
        const position = positionClassName(
          resolved,
          index === 0,
          index === items.length - 1
        )
        return (
          <ButtonClassContext.Provider
            key={child.key}
            value={joinedButtonClassName(position)}
          >
            {child.type === Button ? child : withClassName(child, position)}
          </ButtonClassContext.Provider>
        )
      })}
    </View>
  )
}

function ButtonGroupText({
  className,
  render,
  ...props
}: ViewProps & {
  render?: RenderProp<Record<string, unknown>, Record<string, never>>
}) {
  const element = useRender({
    defaultComponent: View,
    render,
    props: [
      {
        className: cn(
          "flex-row items-center gap-2 rounded-full bg-control px-2.5",
          className
        ),
      },
      props,
    ],
  })
  return (
    <TextClassContext.Provider value="text-sm text-label">
      <IconClassContext.Provider value="size-4 text-label">
        {element}
      </IconClassContext.Provider>
    </TextClassContext.Provider>
  )
}

function ButtonGroupSeparator({
  className,
  orientation = "vertical",
  ...props
}: React.ComponentProps<typeof Separator>) {
  return (
    <Separator
      orientation={orientation}
      className={(state) =>
        cn(
          "relative z-10 bg-label/20",
          state.orientation === "horizontal"
            ? "-mb-px mx-2.25 w-auto"
            : "-mr-px my-2.25",
          resolveClassName(className, state)
        )
      }
      {...props}
    />
  )
}

export { ButtonGroup, ButtonGroupSeparator, ButtonGroupText }
```

4. Update the import paths to match your project.

**NativeWind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install class-variance-authority cn
```

2. Add the pieces it builds on: [Button](/docs/components/button), [Icon](/docs/components/icon), [Separator](/docs/components/separator), [Text](/docs/components/text), and the primitives `components/primitives/types.tsx`, `components/primitives/use-render.tsx`.

3. Copy the source into `components/ui/button-group.tsx`:

```tsx title="nativewind/components/ui/button-group.tsx"
import { cva, type VariantProps } from "class-variance-authority"
import { cn } from "cn"
import * as React from "react"
import { View, type ViewProps } from "react-native"
import type { ClassNameProp, RenderProp } from "@/components/primitives/types"
import { resolveClassName, useRender } from "@/components/primitives/use-render"
import {
  Button,
  ButtonClassContext,
  type ButtonVariant,
} from "@/components/ui/button"
import { IconClassContext } from "@/components/ui/icon"
import { Separator } from "@/components/ui/separator"
import { TextClassContext } from "@/components/ui/text"

type ButtonGroupOrientation = "horizontal" | "vertical"

const buttonGroupVariants = cva("items-stretch self-start", {
  variants: {
    orientation: {
      horizontal: "flex-row",
      vertical: "flex-col",
    },
  },
  defaultVariants: {
    orientation: "horizontal",
  },
})

function positionClassName(
  orientation: ButtonGroupOrientation,
  first: boolean,
  last: boolean
) {
  if (orientation === "vertical") {
    return cn(
      first ? "rounded-t-2xl" : "rounded-t-none border-t-0",
      last ? "rounded-b-2xl" : "rounded-b-none"
    )
  }
  return cn(
    first ? "rounded-l-full" : "rounded-l-none border-l-0",
    last ? "rounded-r-full" : "rounded-r-none"
  )
}

function joinedButtonClassName(className: string) {
  return (variant: ButtonVariant) =>
    variant === "ghost" || variant === "plain" ? undefined : className
}

function withClassName(child: React.ReactElement, className: string) {
  const element = child as React.ReactElement<{ className?: unknown }>
  const current = element.props.className as ClassNameProp<unknown> | undefined
  return React.cloneElement(element, {
    className:
      typeof current === "function"
        ? (state: unknown) => cn(className, resolveClassName(current, state))
        : cn(className, current),
  })
}

function ButtonGroup({
  className,
  orientation = "horizontal",
  children,
  ...props
}: ViewProps & VariantProps<typeof buttonGroupVariants>) {
  const resolved = orientation ?? "horizontal"
  const items = React.Children.toArray(children).filter(React.isValidElement)
  const nested = items.some((child) => child.type === ButtonGroup)
  return (
    <View
      role="group"
      className={cn(
        buttonGroupVariants({ orientation }),
        nested && "gap-2",
        className
      )}
      {...props}
    >
      {items.map((child, index) => {
        if (child.type === ButtonGroup || child.type === ButtonGroupSeparator) {
          return (
            <ButtonClassContext.Provider key={child.key} value={undefined}>
              {child}
            </ButtonClassContext.Provider>
          )
        }
        const position = positionClassName(
          resolved,
          index === 0,
          index === items.length - 1
        )
        return (
          <ButtonClassContext.Provider
            key={child.key}
            value={joinedButtonClassName(position)}
          >
            {child.type === Button ? child : withClassName(child, position)}
          </ButtonClassContext.Provider>
        )
      })}
    </View>
  )
}

function ButtonGroupText({
  className,
  render,
  ...props
}: ViewProps & {
  render?: RenderProp<Record<string, unknown>, Record<string, never>>
}) {
  const element = useRender({
    defaultComponent: View,
    render,
    props: [
      {
        className: cn(
          "flex-row items-center gap-2 rounded-full bg-control px-2.5",
          className
        ),
      },
      props,
    ],
  })
  return (
    <TextClassContext.Provider value="text-sm text-label">
      <IconClassContext.Provider value="size-4 text-label">
        {element}
      </IconClassContext.Provider>
    </TextClassContext.Provider>
  )
}

function ButtonGroupSeparator({
  className,
  orientation = "vertical",
  ...props
}: React.ComponentProps<typeof Separator>) {
  return (
    <Separator
      orientation={orientation}
      className={(state) =>
        cn(
          "relative z-10 bg-label-20",
          state.orientation === "horizontal"
            ? "-mb-px mx-[0.5625rem] w-auto"
            : "-mr-px my-[0.5625rem]",
          resolveClassName(className, state)
        )
      }
      {...props}
    />
  )
}

export { ButtonGroup, ButtonGroupSeparator, ButtonGroupText }
```

4. Update the import paths to match your project.

**StyleSheet**

1. Add the pieces it builds on: [Button](/docs/components/button), [Icon](/docs/components/icon), [Separator](/docs/components/separator), [Text](/docs/components/text), and the primitives `components/primitives/types.tsx`, `components/primitives/use-render.tsx`.

2. Copy the source into `components/ui/button-group.tsx`:

```tsx title="stylesheet/components/ui/button-group.tsx"
import * as React from "react"
import {
  type StyleProp,
  StyleSheet,
  View,
  type ViewProps,
  type ViewStyle,
} from "react-native"
import type { RenderProp } from "@/components/primitives/types"
import { resolveStyle, useRender } from "@/components/primitives/use-render"
import {
  Button,
  ButtonStyleContext,
  type ButtonVariant,
} from "@/components/ui/button"
import { IconSizeContext } from "@/components/ui/icon"
import { Separator } from "@/components/ui/separator"
import { TextStyleContext } from "@/components/ui/text"
import { fontSize, radius, useTheme } from "@/components/ui/theme"

type ButtonGroupOrientation = "horizontal" | "vertical"

const styles = StyleSheet.create({
  root: { alignItems: "stretch", alignSelf: "flex-start" },
  horizontal: { flexDirection: "row" },
  vertical: { flexDirection: "column" },
  nested: { gap: 8 },
  text: {
    flexDirection: "row",
    alignItems: "center",
    gap: 8,
    borderRadius: radius.full,
    paddingHorizontal: 10,
  },
  separator: { position: "relative", zIndex: 10 },
  separatorHorizontal: { marginHorizontal: 9, marginBottom: -1, width: "auto" },
  separatorVertical: { marginVertical: 9, marginRight: -1 },
})

function positionStyle(
  orientation: ButtonGroupOrientation,
  first: boolean,
  last: boolean
): ViewStyle {
  if (orientation === "vertical") {
    const top = first ? radius["2xl"] : 0
    const bottom = last ? radius["2xl"] : 0
    return {
      borderTopLeftRadius: top,
      borderTopRightRadius: top,
      borderBottomLeftRadius: bottom,
      borderBottomRightRadius: bottom,
      ...(first ? null : { borderTopWidth: 0 }),
    }
  }
  const left = first ? radius.full : 0
  const right = last ? radius.full : 0
  return {
    borderTopLeftRadius: left,
    borderBottomLeftRadius: left,
    borderTopRightRadius: right,
    borderBottomRightRadius: right,
    ...(first ? null : { borderLeftWidth: 0 }),
  }
}

function joinedButtonStyle(style: ViewStyle) {
  return (variant: ButtonVariant) =>
    variant === "ghost" || variant === "plain" ? undefined : style
}

function withStyle(child: React.ReactElement, extra: ViewStyle) {
  const element = child as React.ReactElement<{ style?: unknown }>
  const current = element.props.style
  return React.cloneElement(element, {
    style:
      typeof current === "function"
        ? (state: unknown) => [extra, resolveStyle(current, state)]
        : [extra, current],
  })
}

function ButtonGroup({
  style,
  orientation = "horizontal",
  children,
  ...props
}: ViewProps & { orientation?: ButtonGroupOrientation }) {
  const items = React.Children.toArray(children).filter(React.isValidElement)
  const nested = items.some((child) => child.type === ButtonGroup)
  return (
    <View
      role="group"
      style={[
        styles.root,
        orientation === "vertical" ? styles.vertical : styles.horizontal,
        nested && styles.nested,
        style,
      ]}
      {...props}
    >
      {items.map((child, index) => {
        if (child.type === ButtonGroup || child.type === ButtonGroupSeparator) {
          return (
            <ButtonStyleContext.Provider key={child.key} value={undefined}>
              {child}
            </ButtonStyleContext.Provider>
          )
        }
        const position = positionStyle(
          orientation,
          index === 0,
          index === items.length - 1
        )
        return (
          <ButtonStyleContext.Provider
            key={child.key}
            value={joinedButtonStyle(position)}
          >
            {child.type === Button ? child : withStyle(child, position)}
          </ButtonStyleContext.Provider>
        )
      })}
    </View>
  )
}

function ButtonGroupText({
  style,
  render,
  ...props
}: ViewProps & {
  render?: RenderProp<Record<string, unknown>, Record<string, never>>
}) {
  const { colors } = useTheme()
  const element = useRender({
    defaultComponent: View,
    render,
    props: [
      {
        style: [styles.text, { backgroundColor: colors.control }, style],
      },
      props,
    ],
  })
  return (
    <TextStyleContext.Provider value={{ ...fontSize.sm, color: colors.label }}>
      <IconSizeContext.Provider value={16}>{element}</IconSizeContext.Provider>
    </TextStyleContext.Provider>
  )
}

function ButtonGroupSeparator({
  style,
  orientation = "vertical",
  ...props
}: React.ComponentProps<typeof Separator>) {
  const { colors } = useTheme()
  return (
    <Separator
      orientation={orientation}
      style={(state): StyleProp<ViewStyle> => [
        styles.separator,
        { backgroundColor: colors.label, opacity: 0.2 },
        state.orientation === "horizontal"
          ? styles.separatorHorizontal
          : styles.separatorVertical,
        typeof style === "function" ? style(state) : style,
      ]}
      {...props}
    />
  )
}

export { ButtonGroup, ButtonGroupSeparator, ButtonGroupText }
```

3. Update the import paths to match your project.

**SwiftUI**

1. Target iOS 17 or later.

2. Add the Swift package to your app:

```swift title="Package.swift"
.package(url: "https://github.com/phosphor-icons/swift", from: "2.1.0")
```

3. Copy the theme files every view uses:

```swift title="swift/Theme/Theme.swift"
import SwiftUI
import UIKit

struct RGBA: Sendable {
  let red: CGFloat
  let green: CGFloat
  let blue: CGFloat
  let alpha: CGFloat

  init(_ hex: UInt32, _ alpha: CGFloat = 1) {
    red = CGFloat((hex >> 16) & 0xFF) / 255
    green = CGFloat((hex >> 8) & 0xFF) / 255
    blue = CGFloat(hex & 0xFF) / 255
    self.alpha = alpha
  }

  var uiColor: UIColor {
    UIColor(red: red, green: green, blue: blue, alpha: alpha)
  }
}

extension Color {
  static func adaptive(light: RGBA, dark: RGBA) -> Color {
    let lightColor = light.uiColor
    let darkColor = dark.uiColor
    return Color(uiColor: UIColor { traits in
      traits.userInterfaceStyle == .dark ? darkColor : lightColor
    })
  }
}

public struct TextStyle: Sendable, Hashable {
  public let size: CGFloat
  public let lineHeight: CGFloat
  public let letterSpacing: CGFloat

  public init(size: CGFloat, lineHeight: CGFloat, letterSpacing: CGFloat) {
    self.size = size
    self.lineHeight = lineHeight
    self.letterSpacing = letterSpacing
  }

  public func font(weight: Font.Weight = .regular) -> Font {
    .system(size: size, weight: weight)
  }

  public var lineSpacing: CGFloat {
    max(0, lineHeight - UIFont.systemFont(ofSize: size).lineHeight)
  }
}

extension Hashable where Self == Font {
  public static func textStyle(_ style: TextStyle, weight: Font.Weight = .regular) -> Font {
    style.font(weight: weight)
  }
}

private struct TextStyleModifier: ViewModifier {
  let style: TextStyle
  let weight: Font.Weight

  func body(content: Content) -> some View {
    content
      .font(style.font(weight: weight))
      .tracking(style.letterSpacing)
      .lineSpacing(style.lineSpacing)
      .padding(.vertical, style.lineSpacing / 2)
  }
}

extension View {
  public func textStyle(_ style: TextStyle, weight: Font.Weight = .regular) -> some View {
    modifier(TextStyleModifier(style: style, weight: weight))
  }
}

public struct Shadow: Sendable, Hashable {
  public let color: Color
  public let radius: CGFloat
  public let x: CGFloat
  public let y: CGFloat

  public init(color: Color, radius: CGFloat, x: CGFloat = 0, y: CGFloat = 0) {
    self.color = color
    self.radius = radius
    self.x = x
    self.y = y
  }
}

extension View {
  public func shadow(_ shadow: Shadow) -> some View {
    self.shadow(color: shadow.color, radius: shadow.radius, x: shadow.x, y: shadow.y)
  }
}
```

```swift title="swift/Theme/Tokens.swift"
import SwiftUI

extension Color {
  public static let surface = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x000000))
  public static let surfaceSecondary = Color.adaptive(light: .init(0xF5F5F7), dark: .init(0x161617))
  public static let surfaceTertiary = Color.adaptive(light: .init(0xE8E8ED), dark: .init(0x2C2C2E))
  public static let surfaceRaised = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x1D1D1F))
  public static let label = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let labelSecondary = Color.adaptive(light: .init(0x6E6E73), dark: .init(0xA1A1A6))
  public static let labelTertiary = Color.adaptive(light: .init(0x86868B), dark: .init(0x86868B))
  public static let labelQuaternary = Color.adaptive(light: .init(0xD2D2D7), dark: .init(0x424245))
  public static let control = Color.adaptive(light: .init(0x000000, 0.04), dark: .init(0xFFFFFF, 0.1))
  public static let controlPressed = Color.adaptive(light: .init(0x000000, 0.12), dark: .init(0xFFFFFF, 0.22))
  public static let controlSelected = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let controlDisabled = Color.adaptive(light: .init(0x000000, 0.03), dark: .init(0xFFFFFF, 0.05))
  public static let onControlSelected = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x000000))
  public static let itemPressed = Color.adaptive(light: .init(0x000000, 0.08), dark: .init(0xFFFFFF, 0.12))
  public static let itemSelected = Color.adaptive(light: .init(0x000000, 0.06), dark: .init(0xFFFFFF, 0.1))
  public static let separator = Color.adaptive(light: .init(0xD2D2D7), dark: .init(0x424245))
  public static let separatorStrong = Color.adaptive(light: .init(0x86868B), dark: .init(0x6E6E73))
  public static let accent = Color.adaptive(light: .init(0x0071E3), dark: .init(0x0071E3))
  public static let accentPressed = Color.adaptive(light: .init(0x005BB8), dark: .init(0x004D9E))
  public static let accentSelected = Color.adaptive(light: .init(0x0071E3), dark: .init(0x0071E3))
  public static let accentDisabled = Color.adaptive(light: .init(0x0071E3, 0.4), dark: .init(0x0071E3, 0.4))
  public static let onAccent = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0xFFFFFF))
  public static let accentSurface = Color.adaptive(light: .init(0x0071E3, 0.09), dark: .init(0x0071E3, 0.18))
  public static let accentSurfacePressed = Color.adaptive(light: .init(0x0071E3, 0.18), dark: .init(0x0071E3, 0.3))
  public static let link = Color.adaptive(light: .init(0x0066CC), dark: .init(0x2997FF))
  public static let focus = Color.adaptive(light: .init(0x0071E3), dark: .init(0x0071E3))
  public static let scrim = Color.adaptive(light: .init(0x000000, 0.48), dark: .init(0x000000, 0.48))
  public static let media = Color.adaptive(light: .init(0x000000), dark: .init(0x000000))
  public static let onMedia = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0xFFFFFF))
  public static let danger = Color.adaptive(light: .init(0xD0000A), dark: .init(0xFF5447))
  public static let dangerSurface = Color.adaptive(light: .init(0xD70015, 0.08), dark: .init(0xFF453A, 0.2))
  public static let dangerSurfacePressed = Color.adaptive(light: .init(0xD70015, 0.16), dark: .init(0xFF453A, 0.36))
  public static let success = Color.adaptive(light: .init(0x008009), dark: .init(0x30D158))
  public static let successSurface = Color.adaptive(light: .init(0xEFFAF1), dark: .init(0x30D158, 0.16))
  public static let warning = Color.adaptive(light: .init(0xB64400), dark: .init(0xFF9F0A))
  public static let warningSurface = Color.adaptive(light: .init(0xFFF5EA), dark: .init(0xFF9F0A, 0.16))
}

public enum Radius {
  public static let xs: CGFloat = 3
  public static let sm: CGFloat = 5
  public static let md: CGFloat = 8
  public static let lg: CGFloat = 10
  public static let xl: CGFloat = 12
  public static let xl2: CGFloat = 18
  public static let xl3: CGFloat = 28
  public static let full: CGFloat = 9999
}

extension TextStyle {
  public static let xs3 = TextStyle(size: 11, lineHeight: 13, letterSpacing: 0.066)
  public static let xs2 = TextStyle(size: 12, lineHeight: 16, letterSpacing: 0)
  public static let xs = TextStyle(size: 13, lineHeight: 18, letterSpacing: -0.078)
  public static let sm = TextStyle(size: 15, lineHeight: 20, letterSpacing: -0.24)
  public static let md = TextStyle(size: 16, lineHeight: 21, letterSpacing: -0.32)
  public static let base = TextStyle(size: 17, lineHeight: 22, letterSpacing: -0.442)
  public static let lg = TextStyle(size: 20, lineHeight: 25, letterSpacing: -0.46)
  public static let xl = TextStyle(size: 22, lineHeight: 28, letterSpacing: -0.264)
  public static let xl2 = TextStyle(size: 28, lineHeight: 34, letterSpacing: 0.392)
  public static let xl3 = TextStyle(size: 34, lineHeight: 41, letterSpacing: 0.408)

  public static let allCases: [TextStyle] = [.xs3, .xs2, .xs, .sm, .md, .base, .lg, .xl, .xl2, .xl3]
}

extension Shadow {
  public static let md = Shadow(color: .black.opacity(0.08), radius: 6, x: 2, y: 4)
  public static let lg = Shadow(color: .black.opacity(0.12), radius: 12, y: 4)
}
```

4. Copy the source and every file it uses:

```swift title="swift/Components/ButtonGroup.swift"
import SwiftUI

extension EnvironmentValues {
  @Entry var buttonGroup: Axis? = nil
  @Entry var buttonGroupSize: CGSize = .zero
}

enum ButtonGroupSpace: Hashable {
  case group
}

struct ButtonGroupFrame {
  let bounds: Anchor<CGRect>
  let outlined: Bool
}

struct ButtonGroupFramesKey: PreferenceKey {
  static var defaultValue: [ButtonGroupFrame] { [] }

  static func reduce(value: inout [ButtonGroupFrame], nextValue: () -> [ButtonGroupFrame]) {
    value.append(contentsOf: nextValue())
  }
}

struct ButtonGroupNestedKey: PreferenceKey {
  static var defaultValue: Bool { false }

  static func reduce(value: inout Bool, nextValue: () -> Bool) {
    value = value || nextValue()
  }
}

public struct ButtonGroup<Content: View>: View {
  let orientation: Axis
  let content: Content

  @State private var nested = false
  @State private var size: CGSize = .zero

  public init(orientation: Axis = .horizontal, @ViewBuilder content: () -> Content) {
    self.orientation = orientation
    self.content = content()
  }

  public var body: some View {
    let shape = orientation == .horizontal
      ? AnyShape(Capsule())
      : AnyShape(RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous))
    stack
      .coordinateSpace(.named(ButtonGroupSpace.group))
      .onGeometryChange(for: CGSize.self) { $0.size } action: { size = $0 }
      .environment(\.buttonGroup, nested ? nil : orientation)
      .environment(\.buttonGroupSize, size)
      .onPreferenceChange(ButtonGroupNestedKey.self) { nested = $0 }
      .modifier(ButtonGroupClip(shape: nested ? nil : shape))
      .overlayPreferenceValue(ButtonGroupFramesKey.self) { frames in
        if !nested {
          GeometryReader { proxy in
            outline(frames.map { (proxy[$0.bounds], $0.outlined) }, shape: shape)
          }
        }
      }
      .transformPreference(ButtonGroupFramesKey.self) { $0 = [] }
      .transformPreference(ButtonGroupNestedKey.self) { $0 = true }
      .fixedSize(horizontal: orientation == .vertical, vertical: orientation == .horizontal)
      .accessibilityElement(children: .contain)
  }

  @ViewBuilder private var stack: some View {
    switch orientation {
    case .horizontal:
      HStack(spacing: nested ? 8 : 0) { content }
    case .vertical:
      VStack(spacing: nested ? 8 : 0) { content }
    }
  }

  @ViewBuilder private func outline(_ frames: [(CGRect, Bool)], shape: AnyShape) -> some View {
    if frames.contains(where: \.1) {
      ZStack(alignment: .topLeading) {
        shape
          .stroke(Color.separator, lineWidth: 1)
          .padding(0.5)
          .mask {
            Path { path in
              for (rect, outlined) in frames where outlined {
                path.addRect(rect)
              }
            }
          }
        ForEach(Array(frames.dropLast().enumerated()), id: \.offset) { _, frame in
          if frame.1 {
            divider(frame.0)
          }
        }
      }
      .clipShape(shape)
      .allowsHitTesting(false)
    }
  }

  private func divider(_ rect: CGRect) -> some View {
    let horizontal = orientation == .horizontal
    return Rectangle()
      .fill(Color.separator)
      .frame(width: horizontal ? 1 : rect.width, height: horizontal ? rect.height : 1)
      .position(
        x: horizontal ? rect.maxX - 0.5 : rect.midX,
        y: horizontal ? rect.midY : rect.maxY - 0.5
      )
  }
}

struct ButtonGroupItem<Content: View>: View {
  let radius: CGFloat
  let content: (UnevenRoundedRectangle) -> Content

  @State private var frame: CGRect = .zero
  @Environment(\.buttonGroup) private var group
  @Environment(\.buttonGroupSize) private var groupSize

  init(radius: CGFloat, @ViewBuilder content: @escaping (UnevenRoundedRectangle) -> Content) {
    self.radius = radius
    self.content = content
  }

  var body: some View {
    if let group {
      content(shape(group))
        .onGeometryChange(for: CGRect.self) { $0.frame(in: .named(ButtonGroupSpace.group)) } action: { frame = $0 }
    } else {
      content(UnevenRoundedRectangle(cornerRadii: RectangleCornerRadii(
        topLeading: radius,
        bottomLeading: radius,
        bottomTrailing: radius,
        topTrailing: radius
      ), style: .continuous))
    }
  }

  private func shape(_ group: Axis) -> UnevenRoundedRectangle {
    let horizontal = group == .horizontal
    let first = horizontal ? frame.minX <= 0.5 : frame.minY <= 0.5
    let last = horizontal
      ? frame.maxX >= groupSize.width - 0.5
      : frame.maxY >= groupSize.height - 0.5
    let round = horizontal ? frame.height / 2 : Radius.xl2
    let start: CGFloat = first ? round : 0
    let end: CGFloat = last ? round : 0
    let radii = horizontal
      ? RectangleCornerRadii(topLeading: start, bottomLeading: start, bottomTrailing: end, topTrailing: end)
      : RectangleCornerRadii(topLeading: start, bottomLeading: end, bottomTrailing: end, topTrailing: start)
    return UnevenRoundedRectangle(cornerRadii: radii, style: .continuous)
  }
}

private struct ButtonGroupClip: ViewModifier {
  let shape: AnyShape?

  func body(content: Content) -> some View {
    if let shape {
      content.clipShape(shape)
    } else {
      content
    }
  }
}

public struct ButtonGroupText<Content: View>: View {
  let content: Content

  @Environment(\.buttonGroup) private var group

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    let shape = group == nil ? AnyShape(Capsule()) : AnyShape(Rectangle())
    HStack(spacing: 8) {
      content
    }
    .labelStyle(ButtonLabelStyle(spacing: 8, iconSize: 16))
    .scaledFont(.sm)
    .lineLimit(1)
    .foregroundStyle(Color.label)
    .padding(.horizontal, 10)
    .frame(minHeight: 36)
    .frame(maxWidth: group == .vertical ? .infinity : nil, maxHeight: group == .horizontal ? .infinity : nil)
    .background(Color.control, in: shape)
    .anchorPreference(key: ButtonGroupFramesKey.self, value: .bounds) { anchor in
      group == nil ? [] : [ButtonGroupFrame(bounds: anchor, outlined: false)]
    }
  }
}

extension ButtonGroupText where Content == Text {
  public init(_ title: LocalizedStringKey) {
    self.init { Text(title) }
  }

  public init(verbatim title: String) {
    self.init { Text(verbatim: title) }
  }
}

public struct ButtonGroupSeparator: View {
  let orientation: Axis

  public init(_ orientation: Axis = .vertical) {
    self.orientation = orientation
  }

  public var body: some View {
    let vertical = orientation == .vertical
    Rectangle()
      .fill(Color.label.opacity(0.2))
      .frame(width: vertical ? 1 : nil, height: vertical ? nil : 1)
      .padding(vertical ? .vertical : .horizontal, 9)
      .frame(maxWidth: vertical ? nil : .infinity, maxHeight: vertical ? .infinity : nil)
      .padding(vertical ? .trailing : .bottom, -1)
      .zIndex(1)
      .accessibilityHidden(true)
  }
}
```

```swift title="swift/Components/Button.swift"
import SwiftUI

public struct VariantButtonStyle: ButtonStyle {
  public enum Variant: CaseIterable, Sendable {
    case `default`, outline, secondary, tinted, ghost, plain, destructive, link
  }

  public enum Size: CaseIterable, Sendable {
    case `default`, xs, sm, lg, xl, icon, iconXs, iconSm, iconLg, iconXl

    var height: CGFloat {
      switch self {
      case .xs, .iconXs: 24
      case .sm, .iconSm: 32
      case .default, .icon: 36
      case .lg, .iconLg: 44
      case .xl, .iconXl: 56
      }
    }

    var horizontalPadding: CGFloat {
      switch self {
      case .xs: 11
      case .sm: 12
      case .default: 16
      case .lg: 22
      case .xl: 31
      case .icon, .iconXs, .iconSm, .iconLg, .iconXl: 0
      }
    }

    var spacing: CGFloat {
      switch self {
      case .xs, .sm, .iconXs, .iconSm: 4
      case .xl, .iconXl: 8
      default: 6
      }
    }

    var textStyle: TextStyle {
      switch self {
      case .xs, .iconXs: .xs2
      case .lg, .xl: .base
      default: .sm
      }
    }

    public var iconSize: CGFloat {
      switch self {
      case .xs, .iconXs: 12
      default: 16
      }
    }

    var blockRadius: CGFloat {
      switch self {
      case .xs, .iconXs: Radius.sm
      case .lg, .iconLg: Radius.lg
      case .xl, .iconXl: Radius.xl
      default: Radius.md
      }
    }

    var isIcon: Bool {
      switch self {
      case .icon, .iconXs, .iconSm, .iconLg, .iconXl: true
      default: false
      }
    }
  }

  let variant: Variant
  let size: Size
  let block: Bool
  var metrics: ButtonMetrics?

  public init(_ variant: Variant = .default, size: Size = .default, block: Bool = false) {
    self.variant = variant
    self.size = size
    self.block = block
  }

  init(_ variant: Variant, size: Size, metrics: ButtonMetrics) {
    self.variant = variant
    self.size = size
    self.block = false
    self.metrics = metrics
  }

  public func makeBody(configuration: Configuration) -> some View {
    StyledButton(configuration: configuration, variant: variant, size: size, block: block, metrics: metrics)
  }
}

struct ButtonMetrics: Sendable {
  var horizontalPadding: CGFloat
  var spacing: CGFloat
  var iconSize: CGFloat
  var textStyle: TextStyle
}

private struct StyledButton: View {
  let configuration: ButtonStyleConfiguration
  let variant: VariantButtonStyle.Variant
  let size: VariantButtonStyle.Size
  let block: Bool
  let metrics: ButtonMetrics?

  @Environment(\.colorScheme) private var colorScheme
  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.buttonGroup) private var group

  var body: some View {
    let joined = group != nil && variant != .ghost && variant != .plain
    let rounded = RoundedRectangle(
      cornerRadius: block ? size.blockRadius : Radius.full,
      style: .continuous
    )
    let shape = joined ? AnyShape(Rectangle()) : AnyShape(rounded)
    configuration.label
      .labelStyle(ButtonLabelStyle(spacing: metrics?.spacing ?? size.spacing, iconSize: metrics?.iconSize ?? size.iconSize))
    .font((metrics?.textStyle ?? size.textStyle).font())
    .tracking((metrics?.textStyle ?? size.textStyle).letterSpacing)
    .underline(variant == .link && pressed && isEnabled)
    .lineLimit(1)
    .foregroundStyle(foreground)
    .padding(.horizontal, metrics?.horizontalPadding ?? size.horizontalPadding)
    .frame(width: size.isIcon && !block ? size.height : nil, height: size.height)
    .frame(maxWidth: block || group == .vertical ? .infinity : nil)
    .background(background, in: shape)
    .overlay {
      if variant == .outline && !joined {
        rounded.strokeBorder(Color.separator)
      }
    }
    .contentShape(shape)
    .anchorPreference(key: ButtonGroupFramesKey.self, value: .bounds) { anchor in
      joined ? [ButtonGroupFrame(bounds: anchor, outlined: variant == .outline)] : []
    }
  }

  private var isDark: Bool { colorScheme == .dark }
  private var pressed: Bool { configuration.isPressed }

  private var foreground: Color {
    switch variant {
    case .default:
      .onAccent
    case .outline, .secondary, .ghost:
      isEnabled ? .label : .labelQuaternary
    case .tinted, .plain:
      isEnabled ? .link : .link.opacity(0.4)
    case .destructive:
      isEnabled ? .danger : .danger.opacity(0.4)
    case .link:
      isEnabled ? .link : .labelQuaternary
    }
  }

  private var background: Color {
    switch variant {
    case .default:
      !isEnabled ? .accentDisabled : pressed ? .accentPressed : .accent
    case .outline:
      isEnabled && pressed ? .itemPressed : isDark ? .clear : .surface
    case .secondary:
      !isEnabled ? .controlDisabled : pressed ? .controlPressed : .control
    case .tinted:
      isEnabled && pressed ? .accentSurfacePressed : .accentSurface
    case .ghost:
      isEnabled && pressed ? .itemPressed : .clear
    case .plain:
      isEnabled && pressed ? .itemPressed : .clear
    case .destructive:
      isEnabled && pressed ? .dangerSurfacePressed : .dangerSurface
    case .link:
      .clear
    }
  }
}

struct ButtonLabelStyle: LabelStyle {
  let spacing: CGFloat
  let iconSize: CGFloat

  func makeBody(configuration: Configuration) -> some View {
    HStack(spacing: spacing) {
      configuration.icon
        .frame(width: iconSize, height: iconSize)
      configuration.title
    }
  }
}

extension ButtonStyle where Self == VariantButtonStyle {
  public static func variant(
    _ variant: VariantButtonStyle.Variant = .default,
    size: VariantButtonStyle.Size = .default,
    block: Bool = false
  ) -> VariantButtonStyle {
    VariantButtonStyle(variant, size: size, block: block)
  }
}
```

```swift title="swift/Components/Checkbox.swift"
import PhosphorSwift
import SwiftUI

extension Shadow {
  static let control = Shadow(color: .black.opacity(0.08), radius: 0.5, y: 0.5)
  static let thumb = Shadow(color: .black.opacity(0.12), radius: 1.5, y: 1)
}

struct SelectionIndicator<Mark: View>: View {
  let checked: Bool
  let pressed: Bool
  let cornerRadius: CGFloat
  let mark: Mark

  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.isInvalid) private var invalid
  @Environment(\.colorScheme) private var colorScheme

  init(checked: Bool, pressed: Bool, cornerRadius: CGFloat, @ViewBuilder mark: () -> Mark) {
    self.checked = checked
    self.pressed = pressed
    self.cornerRadius = cornerRadius
    self.mark = mark()
  }

  var body: some View {
    let shape = RoundedRectangle(cornerRadius: cornerRadius, style: .continuous)
    ZStack {
      shape.fill(fill)
      shape.strokeBorder(border, lineWidth: 1)
      if checked {
        mark
      }
    }
    .frame(width: 16, height: 16)
    .shadow(raised ? .control : Shadow(color: .clear, radius: 0))
  }

  private var isDark: Bool { colorScheme == .dark }

  private var raised: Bool { !checked && isEnabled && !isDark }

  private var fill: Color {
    if checked {
      return !isEnabled ? .accentDisabled : pressed ? .accentPressed : .accent
    }
    if !isEnabled { return .controlDisabled }
    if isDark { return pressed ? .labelTertiary.opacity(0.6) : .labelQuaternary }
    return pressed ? .control : .surface
  }

  private var border: Color {
    if checked {
      return !isEnabled ? .clear : pressed ? .accentPressed : .accent
    }
    if !isEnabled { return isDark ? .clear : .label.opacity(0.1) }
    if invalid { return .danger }
    return isDark ? .clear : .label.opacity(0.25)
  }
}

struct PressReader<Content: View>: ButtonStyle {
  let content: (Bool) -> Content

  init(@ViewBuilder content: @escaping (Bool) -> Content) {
    self.content = content
  }

  func makeBody(configuration: Configuration) -> some View {
    content(configuration.isPressed)
  }
}

public struct CheckboxStyle: ToggleStyle {
  public init() {}

  public func makeBody(configuration: Configuration) -> some View {
    HapticButton(style: PressReader { pressed in
      HStack(spacing: 12) {
        SelectionIndicator(
          checked: configuration.isOn || configuration.isMixed,
          pressed: pressed,
          cornerRadius: 4
        ) {
          (configuration.isMixed ? Ph.minus.regular : Ph.check.regular)
            .frame(width: 14, height: 14)
            .foregroundStyle(Color.onAccent)
        }
        configuration.label
      }
      .contentShape(Rectangle().inset(by: -8))
    }) {
      configuration.isOn.toggle()
      return true
    }
    .accessibilityElement(children: .combine)
    .accessibilityRemoveTraits(.isButton)
    .accessibilityAddTraits(.isToggle)
    .accessibilityValue(
      configuration.isMixed
        ? Text("Mixed")
        : configuration.isOn ? Text("Checked") : Text("Unchecked")
    )
  }
}

extension ToggleStyle where Self == CheckboxStyle {
  public static var checkbox: CheckboxStyle { CheckboxStyle() }
}
```

```swift title="swift/Components/Field.swift"
import SwiftUI

extension EnvironmentValues {
  @Entry public var isInvalid = false
  @Entry var fieldInset = false
  @Entry var fieldGroupInset = false
  @Entry var fieldSetInset = false
}

extension View {
  public func invalid(_ isInvalid: Bool = true) -> some View {
    environment(\.isInvalid, isInvalid)
  }
}

public enum FieldOrientation: CaseIterable, Sendable {
  case vertical, horizontal
}

public struct Field<Content: View>: View {
  let orientation: FieldOrientation
  let invalid: Bool?
  let content: Content

  @Environment(\.fieldGroupInset) private var inset
  @Environment(\.isInvalid) private var inheritedInvalid

  public init(
    orientation: FieldOrientation = .vertical,
    invalid: Bool? = nil,
    @ViewBuilder content: () -> Content
  ) {
    self.orientation = orientation
    self.invalid = invalid
    self.content = content()
  }

  public var body: some View {
    Group {
      switch orientation {
      case .vertical:
        VStack(alignment: .leading, spacing: 12) { content }
      case .horizontal:
        HStack(alignment: .center, spacing: 12) { content }
      }
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .padding(.horizontal, inset ? 16 : 0)
    .padding(.vertical, inset ? 6 : 0)
    .frame(minHeight: inset ? 44 : nil)
    .overlay(alignment: .top) {
      if inset {
        Color.separator
          .frame(height: 1)
          .padding(.leading, 16)
          .offset(y: -1)
      }
    }
    .environment(\.fieldInset, inset)
    .environment(\.fieldGroupInset, false)
    .environment(\.isInvalid, invalid ?? inheritedInvalid)
  }
}

public struct FieldContent<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    VStack(alignment: .leading, spacing: 4) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}

public struct FieldTitle: View {
  let text: Text

  @Environment(\.isEnabled) private var isEnabled

  public init(_ title: LocalizedStringKey) {
    text = Text(title)
  }

  public init<S: StringProtocol>(_ title: S) {
    text = Text(title)
  }

  public var body: some View {
    text
      .scaledTextStyle(.base, weight: .semibold)
      .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
  }
}

public struct FieldDescription: View {
  let text: Text

  @Environment(\.fieldSetInset) private var inset

  public init(_ description: LocalizedStringKey) {
    text = Text(description)
  }

  public init<S: StringProtocol>(_ description: S) {
    text = Text(description)
  }

  public var body: some View {
    text
      .scaledTextStyle(inset ? .xs : .sm)
      .foregroundStyle(Color.labelSecondary)
      .multilineTextAlignment(.leading)
      .fixedSize(horizontal: false, vertical: true)
      .padding(.leading, inset ? 16 : 0)
  }
}

public struct FieldError: View {
  let messages: [String]
  let text: Text?

  public init(_ message: LocalizedStringKey) {
    messages = []
    text = Text(message)
  }

  public init(errors: [String?]) {
    var seen = Set<String>()
    messages = errors.compactMap { $0 }.filter { !$0.isEmpty && seen.insert($0).inserted }
    text = nil
  }

  public var body: some View {
    if let content {
      content
        .scaledTextStyle(.sm)
        .foregroundStyle(Color.danger)
        .multilineTextAlignment(.leading)
        .fixedSize(horizontal: false, vertical: true)
    }
  }

  private var content: Text? {
    if let text { return text }
    switch messages.count {
    case 0: return nil
    case 1: return Text(verbatim: messages[0])
    default: return Text(verbatim: messages.map { "\u{2022} \($0)" }.joined(separator: "\n"))
    }
  }
}

public enum FieldGroupVariant: CaseIterable, Sendable {
  case `default`, inset
}

public struct FieldGroup<Content: View>: View {
  let variant: FieldGroupVariant
  let content: Content

  public init(_ variant: FieldGroupVariant = .default, @ViewBuilder content: () -> Content) {
    self.variant = variant
    self.content = content()
  }

  public var body: some View {
    styled
      .environment(\.fieldGroupInset, variant == .inset)
      .environment(\.fieldSetInset, false)
      .transformPreference(FieldSetInsetKey.self) { $0 = variant == .inset }
  }

  @ViewBuilder private var styled: some View {
    let stack = VStack(alignment: .leading, spacing: variant == .inset ? 0 : 28) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    if variant == .inset {
      let shape = RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous)
      stack
        .background(Color.surfaceSecondary, in: shape)
        .clipShape(shape)
    } else {
      stack
    }
  }
}

struct FieldSetInsetKey: PreferenceKey {
  static let defaultValue = false

  static func reduce(value: inout Bool, nextValue: () -> Bool) {
    value = value || nextValue()
  }
}

public struct FieldSet<Content: View>: View {
  let content: Content

  @State private var inset = false

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    VStack(alignment: .leading, spacing: inset ? 8 : 24) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .environment(\.fieldSetInset, inset)
    .onPreferenceChange(FieldSetInsetKey.self) { inset = $0 }
    .transformPreference(FieldSetInsetKey.self) { $0 = false }
    .accessibilityElement(children: .contain)
  }
}

public struct FieldLegend: View {
  public enum Variant: CaseIterable, Sendable {
    case legend, label
  }

  let text: Text
  let variant: Variant

  @Environment(\.fieldSetInset) private var inset
  @Environment(\.isEnabled) private var isEnabled

  public init(_ title: LocalizedStringKey, variant: Variant = .legend) {
    text = Text(title)
    self.variant = variant
  }

  public init<S: StringProtocol>(_ title: S, variant: Variant = .legend) {
    text = Text(title)
    self.variant = variant
  }

  public var body: some View {
    Group {
      if inset {
        text
          .textCase(.uppercase)
          .scaledTextStyle(.xs)
          .foregroundStyle(isEnabled ? Color.labelSecondary : .labelQuaternary)
          .padding(.leading, 16)
      } else {
        text
          .scaledTextStyle(.base, weight: .semibold)
          .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
          .padding(.bottom, 12)
      }
    }
    .accessibilityAddTraits(variant == .legend ? .isHeader : [])
  }
}

public struct FieldSeparator<Content: View>: View {
  let content: Content

  public init(@ViewBuilder content: () -> Content) {
    self.content = content()
  }

  public var body: some View {
    ZStack {
      Separator()
      content
        .scaledTextStyle(.sm)
        .foregroundStyle(Color.labelSecondary)
        .padding(.horizontal, 8)
        .background(Color.surface)
    }
    .frame(minHeight: 20)
    .padding(.vertical, -8)
  }
}

extension FieldSeparator where Content == EmptyView {
  public init() {
    self.init { EmptyView() }
  }
}

extension FieldSeparator where Content == Text {
  public init(_ title: LocalizedStringKey) {
    self.init { Text(title) }
  }
}
```

```swift title="swift/Components/Haptics.swift"
import SwiftUI

extension EnvironmentValues {
  @Entry public var hapticsEnabled = true
}

extension View {
  public func haptics(_ enabled: Bool) -> some View {
    environment(\.hapticsEnabled, enabled)
  }

  func hapticFeedback<Trigger: Equatable>(_ feedback: SensoryFeedback, trigger: Trigger) -> some View {
    modifier(HapticFeedbackModifier(feedback: feedback, trigger: trigger) { _, _ in true })
  }

  func hapticFeedback<Trigger: Equatable>(
    _ feedback: SensoryFeedback,
    trigger: Trigger,
    condition: @escaping (Trigger, Trigger) -> Bool
  ) -> some View {
    modifier(HapticFeedbackModifier(feedback: feedback, trigger: trigger, condition: condition))
  }
}

private struct HapticFeedbackModifier<Trigger: Equatable>: ViewModifier {
  let feedback: SensoryFeedback
  let trigger: Trigger
  let condition: (Trigger, Trigger) -> Bool

  @Environment(\.hapticsEnabled) private var enabled

  func body(content: Content) -> some View {
    let enabled = enabled
    let condition = condition
    content.sensoryFeedback(feedback, trigger: trigger) { old, new in
      enabled && condition(old, new)
    }
  }
}

enum HapticMoments {
  static func step(_ value: Double, bounds: ClosedRange<Double>, step: Double?) -> Int? {
    guard let step, step > 0 else { return nil }
    return Int(((value - bounds.lowerBound) / step).rounded())
  }

  static func lifted<Value: Equatable>(_ old: Value?, _ new: Value?) -> Bool {
    new != nil && old != new
  }

  static func crossed<Value: Equatable>(_ old: Value?, _ new: Value?) -> Bool {
    old == nil && new != nil
  }

  static func moved(_ old: Int?, _ new: Int?) -> Bool {
    guard let old, let new else { return false }
    return old != new
  }
}

struct HapticButton<Style: ButtonStyle>: View {
  let feedback: SensoryFeedback
  let action: () -> Bool
  let style: Style

  @State private var count = 0

  init(_ feedback: SensoryFeedback = .selection, style: Style, action: @escaping () -> Bool) {
    self.feedback = feedback
    self.style = style
    self.action = action
  }

  var body: some View {
    Button {
      if action() { count += 1 }
    } label: {
      EmptyView()
    }
    .buttonStyle(style)
    .hapticFeedback(feedback, trigger: count)
  }
}
```

```swift title="swift/Components/Separator.swift"
import SwiftUI

public struct Separator: View {
  let orientation: Axis

  public init(_ orientation: Axis = .horizontal) {
    self.orientation = orientation
  }

  public var body: some View {
    Rectangle()
      .fill(Color.separator)
      .frame(width: orientation == .vertical ? 1 : nil, height: orientation == .horizontal ? 1 : nil)
      .frame(maxWidth: orientation == .horizontal ? .infinity : nil, maxHeight: orientation == .vertical ? .infinity : nil)
      .accessibilityHidden(true)
  }
}
```

```swift title="swift/Components/TextVariant.swift"
import SwiftUI

public enum TextVariant: CaseIterable, Sendable {
  case `default`, h1, h2, h3, h4, p, blockquote, code, lead, large, small, muted

  var style: TextStyle {
    switch self {
    case .h1: .xl3
    case .h2: .xl2
    case .h3: .xl
    case .h4, .lead, .large: .lg
    case .code, .small, .muted: .sm
    default: .base
    }
  }

  var weight: Font.Weight {
    switch self {
    case .h1, .h2: .bold
    case .h3, .h4, .large, .code: .semibold
    case .small: .medium
    default: .regular
    }
  }

  var color: Color {
    switch self {
    case .lead, .muted: .labelSecondary
    default: .label
    }
  }

  var isHeading: Bool {
    switch self {
    case .h1, .h2, .h3, .h4: true
    default: false
    }
  }
}

private struct TextVariantModifier: ViewModifier {
  let variant: TextVariant

  func body(content: Content) -> some View {
    switch variant {
    case .blockquote:
      styled(content)
        .italic()
        .padding(.leading, 12)
        .overlay(alignment: .leading) {
          Rectangle().fill(Color.separator).frame(width: 2)
        }
        .padding(.top, 16)
    case .code:
      styled(content)
        .monospaced()
        .padding(.horizontal, 4)
        .padding(.vertical, 2)
        .background(Color.surfaceSecondary, in: RoundedRectangle(cornerRadius: Radius.sm, style: .continuous))
    case .p:
      styled(content).padding(.top, 12)
    default:
      styled(content)
    }
  }

  private func styled(_ content: Content) -> some View {
    content
      .scaledTextStyle(variant.style, weight: variant.weight)
      .foregroundStyle(variant.color)
      .accessibilityAddTraits(variant.isHeading ? .isHeader : [])
  }
}

extension View {
  public func textVariant(_ variant: TextVariant) -> some View {
    modifier(TextVariantModifier(variant: variant))
  }
}

private struct ScaledTextStyleModifier: ViewModifier {
  let style: TextStyle
  let weight: Font.Weight

  @ScaledMetric(relativeTo: .body) private var scale: CGFloat = 1

  func body(content: Content) -> some View {
    let size = style.size * scale
    let lineSpacing = max(0, style.lineHeight * scale - UIFont.systemFont(ofSize: size).lineHeight)
    content
      .font(.system(size: size, weight: weight))
      .tracking(style.letterSpacing)
      .lineSpacing(lineSpacing)
      .padding(.vertical, lineSpacing / 2)
  }
}

extension View {
  func scaledTextStyle(_ style: TextStyle, weight: Font.Weight = .regular) -> some View {
    modifier(ScaledTextStyleModifier(style: style, weight: weight))
  }

  func scaledFont(_ style: TextStyle, weight: Font.Weight = .regular) -> some View {
    modifier(ScaledFontModifier(style: style, weight: weight))
  }
}

private struct ScaledFontModifier: ViewModifier {
  let style: TextStyle
  let weight: Font.Weight

  @ScaledMetric(relativeTo: .body) private var scale: CGFloat = 1

  func body(content: Content) -> some View {
    content
      .font(.system(size: style.size * scale, weight: weight))
      .tracking(style.letterSpacing)
  }
}
```

5. Add the files to your app target.

**Jetpack Compose**

1. Set `minSdk` to 24 or higher and add the dependencies:

```kotlin title="build.gradle.kts"
implementation(platform("androidx.compose:compose-bom:2026.09.00"))
implementation("androidx.compose.foundation:foundation")
implementation("androidx.compose.ui:ui")
```

2. Copy the theme files every view uses:

```kt title="kotlin/theme/Theme.kt"
package com.esuiss.ui.theme

import androidx.compose.foundation.isSystemInDarkTheme
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.dropShadow
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.graphics.shadow.Shadow as DropShadow
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.style.LineHeightStyle
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.DpOffset
import androidx.compose.ui.unit.em
import androidx.compose.ui.unit.sp

internal fun textStyle(size: Double, lineHeight: Double, letterSpacing: Double) = TextStyle(
    fontSize = size.sp,
    lineHeight = lineHeight.sp,
    letterSpacing = letterSpacing.em,
    lineHeightStyle = LineHeightStyle(
        alignment = LineHeightStyle.Alignment.Center,
        trim = LineHeightStyle.Trim.None,
    ),
)

@Immutable
data class Shadow(
    val offsetX: Dp,
    val offsetY: Dp,
    val blur: Dp,
    val color: Color,
)

fun Modifier.shadow(shadow: Shadow, shape: Shape): Modifier = dropShadow(
    shape,
    DropShadow(
        radius = shadow.blur,
        color = shadow.color,
        offset = DpOffset(shadow.offsetX, shadow.offsetY),
    ),
)

val LocalColors = staticCompositionLocalOf { LightColors }

object EsuissTheme {
    val colors: Colors
        @Composable get() = LocalColors.current

    val typography: Typography
        get() = Typography

    val radius: Radius
        get() = Radius

    val shadows: Shadows
        get() = Shadows
}

@Composable
fun EsuissTheme(
    darkTheme: Boolean = isSystemInDarkTheme(),
    content: @Composable () -> Unit,
) {
    CompositionLocalProvider(
        LocalColors provides if (darkTheme) DarkColors else LightColors,
        content = content,
    )
}
```

```kt title="kotlin/theme/Tokens.kt"
package com.esuiss.ui.theme

import androidx.compose.runtime.Immutable
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp

@Immutable
data class Colors(
    val surface: Color,
    val surfaceSecondary: Color,
    val surfaceTertiary: Color,
    val surfaceRaised: Color,
    val label: Color,
    val labelSecondary: Color,
    val labelTertiary: Color,
    val labelQuaternary: Color,
    val control: Color,
    val controlPressed: Color,
    val controlSelected: Color,
    val controlDisabled: Color,
    val onControlSelected: Color,
    val itemPressed: Color,
    val itemSelected: Color,
    val separator: Color,
    val separatorStrong: Color,
    val accent: Color,
    val accentPressed: Color,
    val accentSelected: Color,
    val accentDisabled: Color,
    val onAccent: Color,
    val accentSurface: Color,
    val accentSurfacePressed: Color,
    val link: Color,
    val focus: Color,
    val scrim: Color,
    val media: Color,
    val onMedia: Color,
    val danger: Color,
    val dangerSurface: Color,
    val dangerSurfacePressed: Color,
    val success: Color,
    val successSurface: Color,
    val warning: Color,
    val warningSurface: Color,
    val blue: Color,
    val green: Color,
    val orange: Color,
    val red: Color,
    val yellow: Color,
    val purple: Color,
    val pink: Color,
    val indigo: Color,
    val teal: Color,
    val mint: Color,
    val cyan: Color,
    val brown: Color,
    val gray: Color,
    val isDark: Boolean,
)

val LightColors = Colors(
    surface = Color(0xFFFFFFFF),
    surfaceSecondary = Color(0xFFF5F5F7),
    surfaceTertiary = Color(0xFFE8E8ED),
    surfaceRaised = Color(0xFFFFFFFF),
    label = Color(0xFF1D1D1F),
    labelSecondary = Color(0xFF6E6E73),
    labelTertiary = Color(0xFF86868B),
    labelQuaternary = Color(0xFFD2D2D7),
    control = Color(0xFF000000).copy(alpha = 0.04f),
    controlPressed = Color(0xFF000000).copy(alpha = 0.12f),
    controlSelected = Color(0xFF1D1D1F),
    controlDisabled = Color(0xFF000000).copy(alpha = 0.03f),
    onControlSelected = Color(0xFFFFFFFF),
    itemPressed = Color(0xFF000000).copy(alpha = 0.08f),
    itemSelected = Color(0xFF000000).copy(alpha = 0.06f),
    separator = Color(0xFFD2D2D7),
    separatorStrong = Color(0xFF86868B),
    accent = Color(0xFF0071E3),
    accentPressed = Color(0xFF005BB8),
    accentSelected = Color(0xFF0071E3),
    accentDisabled = Color(0xFF0071E3).copy(alpha = 0.4f),
    onAccent = Color(0xFFFFFFFF),
    accentSurface = Color(0xFF0071E3).copy(alpha = 0.09f),
    accentSurfacePressed = Color(0xFF0071E3).copy(alpha = 0.18f),
    link = Color(0xFF0066CC),
    focus = Color(0xFF0071E3),
    scrim = Color(0xFF000000).copy(alpha = 0.48f),
    media = Color(0xFF000000),
    onMedia = Color(0xFFFFFFFF),
    danger = Color(0xFFD0000A),
    dangerSurface = Color(0xFFD70015).copy(alpha = 0.08f),
    dangerSurfacePressed = Color(0xFFD70015).copy(alpha = 0.16f),
    success = Color(0xFF008009),
    successSurface = Color(0xFFEFFAF1),
    warning = Color(0xFFB64400),
    warningSurface = Color(0xFFFFF5EA),
    blue = Color(0xFF007AFF),
    green = Color(0xFF34C759),
    orange = Color(0xFFFF9500),
    red = Color(0xFFFF3B30),
    yellow = Color(0xFFFFCC00),
    purple = Color(0xFFAF52DE),
    pink = Color(0xFFFF2D55),
    indigo = Color(0xFF5856D6),
    teal = Color(0xFF30B0C7),
    mint = Color(0xFF00C7BE),
    cyan = Color(0xFF32ADE6),
    brown = Color(0xFFA2845E),
    gray = Color(0xFF8E8E93),
    isDark = false,
)

val DarkColors = Colors(
    surface = Color(0xFF000000),
    surfaceSecondary = Color(0xFF161617),
    surfaceTertiary = Color(0xFF2C2C2E),
    surfaceRaised = Color(0xFF1D1D1F),
    label = Color(0xFFF5F5F7),
    labelSecondary = Color(0xFFA1A1A6),
    labelTertiary = Color(0xFF86868B),
    labelQuaternary = Color(0xFF424245),
    control = Color(0xFFFFFFFF).copy(alpha = 0.1f),
    controlPressed = Color(0xFFFFFFFF).copy(alpha = 0.22f),
    controlSelected = Color(0xFFF5F5F7),
    controlDisabled = Color(0xFFFFFFFF).copy(alpha = 0.05f),
    onControlSelected = Color(0xFF000000),
    itemPressed = Color(0xFFFFFFFF).copy(alpha = 0.12f),
    itemSelected = Color(0xFFFFFFFF).copy(alpha = 0.1f),
    separator = Color(0xFF424245),
    separatorStrong = Color(0xFF6E6E73),
    accent = Color(0xFF0071E3),
    accentPressed = Color(0xFF004D9E),
    accentSelected = Color(0xFF0071E3),
    accentDisabled = Color(0xFF0071E3).copy(alpha = 0.4f),
    onAccent = Color(0xFFFFFFFF),
    accentSurface = Color(0xFF0071E3).copy(alpha = 0.18f),
    accentSurfacePressed = Color(0xFF0071E3).copy(alpha = 0.3f),
    link = Color(0xFF2997FF),
    focus = Color(0xFF0071E3),
    scrim = Color(0xFF000000).copy(alpha = 0.48f),
    media = Color(0xFF000000),
    onMedia = Color(0xFFFFFFFF),
    danger = Color(0xFFFF5447),
    dangerSurface = Color(0xFFFF453A).copy(alpha = 0.2f),
    dangerSurfacePressed = Color(0xFFFF453A).copy(alpha = 0.36f),
    success = Color(0xFF30D158),
    successSurface = Color(0xFF30D158).copy(alpha = 0.16f),
    warning = Color(0xFFFF9F0A),
    warningSurface = Color(0xFFFF9F0A).copy(alpha = 0.16f),
    blue = Color(0xFF0A84FF),
    green = Color(0xFF30D158),
    orange = Color(0xFFFF9F0A),
    red = Color(0xFFFF453A),
    yellow = Color(0xFFFFD60A),
    purple = Color(0xFFBF5AF2),
    pink = Color(0xFFFF375F),
    indigo = Color(0xFF5E5CE6),
    teal = Color(0xFF40C8E0),
    mint = Color(0xFF66D4CF),
    cyan = Color(0xFF64D2FF),
    brown = Color(0xFFAC8E68),
    gray = Color(0xFF8E8E93),
    isDark = true,
)

object Radius {
    val xs = 3.dp
    val sm = 5.dp
    val md = 8.dp
    val lg = 10.dp
    val xl = 12.dp
    val xl2 = 18.dp
    val xl3 = 28.dp
    val full = 9999.dp
}

object Typography {
    val xs3 = textStyle(11.0, 13.0, 0.006)
    val xs2 = textStyle(12.0, 16.0, 0.0)
    val xs = textStyle(13.0, 18.0, -0.006)
    val sm = textStyle(15.0, 20.0, -0.016)
    val md = textStyle(16.0, 21.0, -0.02)
    val base = textStyle(17.0, 22.0, -0.026)
    val lg = textStyle(20.0, 25.0, -0.023)
    val xl = textStyle(22.0, 28.0, -0.012)
    val xl2 = textStyle(28.0, 34.0, 0.014)
    val xl3 = textStyle(34.0, 41.0, 0.012)

    val all = listOf(xs3, xs2, xs, sm, md, base, lg, xl, xl2, xl3)
}

object Shadows {
    val md = Shadow(2.dp, 4.dp, 12.dp, Color.Black.copy(alpha = 0.08f))
    val lg = Shadow(0.dp, 4.dp, 24.dp, Color.Black.copy(alpha = 0.12f))
}
```

3. Copy the source and every file it uses:

```kt title="kotlin/components/ButtonGroup.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.shape.CornerSize
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.DisposableEffect
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.Stable
import androidx.compose.runtime.compositionLocalOf
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableIntStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.draw.drawBehind
import androidx.compose.ui.draw.drawWithContent
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.RectangleShape
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.graphics.drawOutline
import androidx.compose.ui.graphics.drawscope.Stroke
import androidx.compose.ui.graphics.drawscope.translate
import androidx.compose.ui.graphics.takeOrElse
import androidx.compose.ui.layout.Layout
import androidx.compose.ui.layout.Placeable
import androidx.compose.ui.layout.layout
import androidx.compose.ui.layout.layoutId
import androidx.compose.ui.layout.onPlaced
import androidx.compose.ui.platform.LocalLayoutDirection
import androidx.compose.ui.semantics.isTraversalGroup
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.Constraints
import androidx.compose.ui.unit.LayoutDirection
import androidx.compose.ui.unit.constrainHeight
import androidx.compose.ui.unit.constrainWidth
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography

enum class ButtonGroupOrientation { Horizontal, Vertical }

@Stable
internal class ButtonGroupState(val orientation: ButtonGroupOrientation) {
    var nested by mutableIntStateOf(0)
    var outlined by mutableIntStateOf(0)
}

internal val LocalButtonGroup = compositionLocalOf<ButtonGroupState?> { null }

internal object ButtonGroupFill

private object ButtonGroupDivider

internal fun ButtonGroupState?.itemShape(default: Shape): Shape = if (this == null) default else RectangleShape

@Immutable
internal class ButtonGroupItem(val shape: Shape, val modifier: Modifier)

@Composable
internal fun rememberButtonGroupItem(group: ButtonGroupState?, default: Shape): ButtonGroupItem {
    var edges by remember { mutableIntStateOf(0) }
    val horizontal = group?.orientation != ButtonGroupOrientation.Vertical
    val rtl = LocalLayoutDirection.current == LayoutDirection.Rtl
    val shape = remember(edges, horizontal) {
        val round = if (horizontal) CornerSize(50) else CornerSize(Radius.xl2)
        val square = CornerSize(0)
        val start = if (edges and 1 != 0) round else square
        val end = if (edges and 2 != 0) round else square
        if (horizontal) {
            RoundedCornerShape(topStart = start, topEnd = end, bottomEnd = end, bottomStart = start)
        } else {
            RoundedCornerShape(topStart = start, topEnd = start, bottomEnd = end, bottomStart = end)
        }
    }
    if (group == null || group.nested > 0) return ButtonGroupItem(default, Modifier)
    return ButtonGroupItem(
        shape = shape,
        modifier = Modifier.onPlaced { coordinates ->
            val parent = coordinates.parentLayoutCoordinates ?: return@onPlaced
            val bounds = parent.localBoundingBoxOf(coordinates, clipBounds = false)
            val first: Boolean
            val last: Boolean
            if (horizontal) {
                val left = bounds.left <= 0.5f
                val right = bounds.right >= parent.size.width - 0.5f
                first = if (rtl) right else left
                last = if (rtl) left else right
            } else {
                first = bounds.top <= 0.5f
                last = bounds.bottom >= parent.size.height - 0.5f
            }
            edges = (if (first) 1 else 0) or (if (last) 2 else 0)
        },
    )
}

internal fun Modifier.buttonGroupEdge(group: ButtonGroupState?, color: Color): Modifier {
    if (group == null) return this
    return drawBehind {
        val stroke = 1.dp.toPx()
        if (group.orientation == ButtonGroupOrientation.Horizontal) {
            val x = if (layoutDirection == LayoutDirection.Rtl) 0f else size.width - stroke
            drawRect(color, Offset(x, 0f), Size(stroke, size.height))
        } else {
            drawRect(color, Offset(0f, size.height - stroke), Size(size.width, stroke))
        }
    }
}

@Composable
internal fun RegisterButtonGroupOutline(group: ButtonGroupState?, outlined: Boolean) {
    DisposableEffect(group, outlined) {
        if (group != null && outlined) group.outlined += 1
        onDispose {
            if (group != null && outlined) group.outlined -= 1
        }
    }
}

@Composable
fun ButtonGroup(
    modifier: Modifier = Modifier,
    orientation: ButtonGroupOrientation = ButtonGroupOrientation.Horizontal,
    content: @Composable () -> Unit,
) {
    val parent = LocalButtonGroup.current
    DisposableEffect(parent) {
        parent?.let { it.nested += 1 }
        onDispose { parent?.let { it.nested -= 1 } }
    }
    val state = remember(orientation) { ButtonGroupState(orientation) }
    val colors = EsuissTheme.colors
    val joined = state.nested == 0
    val horizontal = orientation == ButtonGroupOrientation.Horizontal
    val shape = if (horizontal) CircleShape else RoundedCornerShape(Radius.xl2)
    val outline = colors.separator
    Layout(
        content = {
            CompositionLocalProvider(LocalButtonGroup provides state, content = content)
        },
        modifier = modifier
            .semantics { isTraversalGroup = true }
            .then(
                if (joined) {
                    Modifier
                        .clip(shape)
                        .drawWithContent {
                            drawContent()
                            if (state.outlined > 0) {
                                val stroke = 1.dp.toPx()
                                val inset = stroke / 2
                                val path = shape.createOutline(
                                    Size(size.width - stroke, size.height - stroke),
                                    layoutDirection,
                                    this,
                                )
                                translate(inset, inset) {
                                    drawOutline(path, outline, style = Stroke(stroke))
                                }
                            }
                        }
                } else {
                    Modifier
                },
            ),
    ) { measurables, constraints ->
        val gap = if (joined) 0 else 8.dp.roundToPx()
        val items = measurables.filter { it.layoutId != ButtonGroupDivider }
        if (horizontal) {
            val height = if (constraints.hasFixedHeight) {
                constraints.maxHeight
            } else {
                constraints.constrainHeight(items.maxOfOrNull { it.maxIntrinsicHeight(Constraints.Infinity) } ?: 0)
            }
            val fills = measurables.count { it.layoutId == ButtonGroupFill }
            val placeables = arrayOfNulls<Placeable>(measurables.size)
            var used = 0
            measurables.forEachIndexed { index, measurable ->
                if (measurable.layoutId != ButtonGroupFill) {
                    val placeable = measurable.measure(Constraints(minHeight = height, maxHeight = height))
                    placeables[index] = placeable
                    used += placeable.width
                }
            }
            val gaps = gap * (items.size - 1).coerceAtLeast(0)
            val remaining = if (constraints.hasBoundedWidth) {
                (constraints.maxWidth - used - gaps).coerceAtLeast(0)
            } else {
                0
            }
            measurables.forEachIndexed { index, measurable ->
                if (measurable.layoutId == ButtonGroupFill) {
                    val placeable = if (constraints.hasBoundedWidth) {
                        val width = remaining / fills
                        measurable.measure(Constraints(width, width, height, height))
                    } else {
                        measurable.measure(Constraints(minHeight = height, maxHeight = height))
                    }
                    placeables[index] = placeable
                    used += placeable.width
                }
            }
            val width = constraints.constrainWidth(used + gaps)
            layout(width, height) {
                var x = 0
                measurables.forEachIndexed { index, measurable ->
                    val placeable = placeables[index] ?: return@forEachIndexed
                    val divider = measurable.layoutId == ButtonGroupDivider
                    placeable.placeRelative(x, 0, zIndex = if (divider) 1f else 0f)
                    if (!divider) x += placeable.width + gap
                }
            }
        } else {
            val width = if (constraints.hasFixedWidth) {
                constraints.maxWidth
            } else {
                constraints.constrainWidth(items.maxOfOrNull { it.maxIntrinsicWidth(Constraints.Infinity) } ?: 0)
            }
            val placeables = measurables.map { it.measure(Constraints(minWidth = width, maxWidth = width)) }
            val gaps = gap * (items.size - 1).coerceAtLeast(0)
            val height = constraints.constrainHeight(
                placeables.filterIndexed { index, _ -> measurables[index].layoutId != ButtonGroupDivider }.sumOf { it.height } + gaps,
            )
            layout(width, height) {
                var y = 0
                measurables.forEachIndexed { index, measurable ->
                    val divider = measurable.layoutId == ButtonGroupDivider
                    placeables[index].placeRelative(0, y, zIndex = if (divider) 1f else 0f)
                    if (!divider) y += placeables[index].height + gap
                }
            }
        }
    }
}

@Composable
fun ButtonGroupText(
    modifier: Modifier = Modifier,
    content: @Composable RowScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val shape = LocalButtonGroup.current.itemShape(CircleShape)
    Row(
        modifier = modifier
            .clip(shape)
            .background(colors.control, shape)
            .padding(horizontal = 10.dp),
        horizontalArrangement = Arrangement.spacedBy(8.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        CompositionLocalProvider(
            LocalButtonGroup provides null,
            LocalContentStyle provides Typography.sm.copy(color = colors.label),
            LocalContentColor provides colors.label,
            LocalIconSize provides 16.dp,
        ) {
            content()
        }
    }
}

@Composable
fun ButtonGroupSeparator(
    modifier: Modifier = Modifier,
    orientation: Orientation = Orientation.Vertical,
    color: Color = Color.Unspecified,
) {
    val line = color.takeOrElse { EsuissTheme.colors.label.copy(alpha = 0.2f) }
    Box(
        modifier = modifier
            .layoutId(ButtonGroupDivider)
            .then(
                if (orientation == Orientation.Vertical) {
                    Modifier.layout { measurable, constraints ->
                        val placeable = measurable.measure(constraints.copy(minWidth = 0, maxWidth = 0))
                        layout(0, placeable.height) { placeable.place(0, 0) }
                    }
                } else {
                    Modifier.layout { measurable, constraints ->
                        val placeable = measurable.measure(constraints.copy(minHeight = 0, maxHeight = 0))
                        layout(placeable.width, 0) { placeable.place(0, 0) }
                    }
                },
            )
            .drawBehind {
                val stroke = 1.dp.toPx()
                val inset = 9.dp.toPx()
                if (orientation == Orientation.Vertical) {
                    val x = if (layoutDirection == LayoutDirection.Rtl) -stroke else 0f
                    drawRect(line, Offset(x, inset), Size(stroke, (size.height - inset * 2).coerceAtLeast(0f)))
                } else {
                    drawRect(line, Offset(inset, 0f), Size((size.width - inset * 2).coerceAtLeast(0f), stroke))
                }
            },
    )
}
```

```kt title="kotlin/components/Content.kt"
package com.esuiss.ui.components

import androidx.compose.runtime.compositionLocalOf
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp

val LocalContentStyle = compositionLocalOf { TextStyle.Default }

val LocalContentColor = compositionLocalOf { Color.Unspecified }

val LocalIconSize = compositionLocalOf { 20.dp }
```

4. Update the `com.esuiss.ui` package names to match your project.

## Usage

```tsx
import { ButtonGroup, ButtonGroupText, ButtonGroupSeparator } from "@/components/ui/button-group"
```

```tsx
<ButtonGroup>
  <ButtonGroup>
    <Button variant="secondary" size="icon" accessibilityLabel="Go back">
      <Icon as={ArrowLeftIcon} />
    </Button>
  </ButtonGroup>
  <ButtonGroup>
    <Button variant="secondary">
      <Text>Archive</Text>
    </Button>
    <ButtonGroupSeparator />
    <Button variant="secondary">
      <Text>Report</Text>
    </Button>
  </ButtonGroup>
  <ButtonGroup>
    <Button variant="secondary">
      <Text>Snooze</Text>
    </Button>
    <ButtonGroupSeparator />
    <DropdownMenu>
      <DropdownMenuTrigger
        accessibilityLabel="More options"
        render={<Button variant="secondary" size="icon" />}
      >
        <Icon as={DotsThreeIcon} />
      </DropdownMenuTrigger>
      <MailMenuContent />
    </DropdownMenu>
  </ButtonGroup>
</ButtonGroup>
```

Set `orientation="vertical"` to stack the buttons. Use a separator between buttons of the same filled variant, such as in a split button, where there is no border to divide them.

Give icon-only buttons an `accessibilityLabel`, and give the group one when its purpose is not clear from its contents.

## Examples

### Outline

Nested groups of `outline` buttons.

![Preview](https://uim.suiss.app/previews/components-button-group--outline.light.webp)

```tsx
import { ArchiveIcon, ArrowLeftIcon, CalendarPlusIcon, ClockIcon, DotsThreeIcon, ListPlusIcon, TagIcon, TrashIcon } from "phosphor-react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup } from "@/components/ui/button-group"
import { DropdownMenu, DropdownMenuContent, DropdownMenuGroup, DropdownMenuItem, DropdownMenuSeparator, DropdownMenuTrigger } from "@/components/ui/dropdown-menu"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"

function MailMenuContent() {
  return (
    <DropdownMenuContent align="end" className="w-52">
      <DropdownMenuGroup>
        <DropdownMenuItem>
          <Icon as={ListPlusIcon} className="size-4" />
          <Text>Mark as read</Text>
        </DropdownMenuItem>
        <DropdownMenuItem>
          <Icon as={ArchiveIcon} className="size-4" />
          <Text>Archive</Text>
        </DropdownMenuItem>
      </DropdownMenuGroup>
      <DropdownMenuSeparator />
      <DropdownMenuGroup>
        <DropdownMenuItem>
          <Icon as={ClockIcon} className="size-4" />
          <Text>Snooze</Text>
        </DropdownMenuItem>
        <DropdownMenuItem>
          <Icon as={CalendarPlusIcon} className="size-4" />
          <Text>Add to calendar</Text>
        </DropdownMenuItem>
        <DropdownMenuItem>
          <Icon as={TagIcon} className="size-4" />
          <Text>Label as</Text>
        </DropdownMenuItem>
      </DropdownMenuGroup>
      <DropdownMenuSeparator />
      <DropdownMenuGroup>
        <DropdownMenuItem variant="destructive">
          <Icon as={TrashIcon} className="size-4" />
          <Text>Trash</Text>
        </DropdownMenuItem>
      </DropdownMenuGroup>
    </DropdownMenuContent>
  )
}

export function ButtonGroupOutlineExample() {
  return (
    <ButtonGroup>
      <ButtonGroup>
        <Button variant="outline" size="icon" accessibilityLabel="Go back">
          <Icon as={ArrowLeftIcon} />
        </Button>
      </ButtonGroup>
      <ButtonGroup>
        <Button variant="outline">
          <Text>Archive</Text>
        </Button>
        <Button variant="outline">
          <Text>Report</Text>
        </Button>
      </ButtonGroup>
      <ButtonGroup>
        <Button variant="outline">
          <Text>Snooze</Text>
        </Button>
        <DropdownMenu>
          <DropdownMenuTrigger
            accessibilityLabel="More options"
            render={<Button variant="outline" size="icon" />}
          >
            <Icon as={DotsThreeIcon} />
          </DropdownMenuTrigger>
          <MailMenuContent />
        </DropdownMenu>
      </ButtonGroup>
    </ButtonGroup>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupOutlineExample: View {
  var body: some View {
    ButtonGroup {
      ButtonGroup {
        ButtonGroupIconButton(icon: Ph.arrowLeft.regular, label: "Go back", variant: .outline)
      }
      ButtonGroup {
        Button("Archive") {}.buttonStyle(.variant(.outline))
        Button("Report") {}.buttonStyle(.variant(.outline))
      }
      ButtonGroup {
        Button("Snooze") {}.buttonStyle(.variant(.outline))
        ButtonGroupMailMenu(variant: .outline)
      }
    }
  }
}

struct ButtonGroupIcon: View {
  let icon: Image
  let size: VariantButtonStyle.Size

  var body: some View {
    icon.frame(width: size.iconSize, height: size.iconSize)
  }
}

struct ButtonGroupIconButton: View {
  let icon: Image
  let label: LocalizedStringKey
  let variant: VariantButtonStyle.Variant
  var size: VariantButtonStyle.Size = .icon

  var body: some View {
    Button {} label: {
      ButtonGroupIcon(icon: icon, size: size)
    }
    .buttonStyle(.variant(variant, size: size))
    .accessibilityLabel(Text(label))
  }
}

struct ButtonGroupMailMenu: View {
  let variant: VariantButtonStyle.Variant

  var body: some View {
    DropdownMenu(align: .end) {
      DropdownMenuGroup {
        DropdownMenuItem("Mark as read", icon: Ph.listPlus.regular) {}
        DropdownMenuItem("Archive", icon: Ph.archive.regular) {}
      }
      DropdownMenuSeparator()
      DropdownMenuGroup {
        DropdownMenuItem("Snooze", icon: Ph.clock.regular) {}
        DropdownMenuItem("Add to calendar", icon: Ph.calendarPlus.regular) {}
        DropdownMenuItem("Label as", icon: Ph.tag.regular) {}
      }
      DropdownMenuSeparator()
      DropdownMenuGroup {
        DropdownMenuItem("Trash", icon: Ph.trash.regular, variant: .destructive) {}
      }
    } label: {
      ButtonGroupIcon(icon: Ph.dotsThree.bold, size: .icon)
    }
    .buttonStyle(.variant(variant, size: .icon))
    .accessibilityLabel(Text("More options"))
  }
}
```

```kotlin
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.semantics.contentDescription
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Archive
import com.adamglin.phosphoricons.regular.ArrowLeft
import com.adamglin.phosphoricons.regular.CalendarPlus
import com.adamglin.phosphoricons.regular.Clock
import com.adamglin.phosphoricons.regular.DotsThree
import com.adamglin.phosphoricons.regular.ListPlus
import com.adamglin.phosphoricons.regular.Tag
import com.adamglin.phosphoricons.regular.Trash
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonGroupSeparator
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.DropdownMenu
import com.esuiss.ui.components.DropdownMenuGroup
import com.esuiss.ui.components.DropdownMenuItem
import com.esuiss.ui.components.DropdownMenuSeparator
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.MenuItemVariant
import com.esuiss.ui.components.PopupAlign

@Composable
fun ButtonGroupOutlineExample() {
    ButtonGroupMail(ButtonVariant.Outline, separators = false)
}

@Composable
fun ButtonGroupIconButton(
    label: String,
    icon: androidx.compose.ui.graphics.vector.ImageVector,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Icon,
    onClick: () -> Unit = {},
) {
    Button(onClick = onClick, variant = variant, size = size) {
        Icon(icon, contentDescription = label)
    }
}

@Composable
fun ButtonGroupMailMenu(variant: ButtonVariant) {
    var open by rememberSaveable { mutableStateOf(false) }
    DropdownMenu(
        expanded = open,
        onExpandedChange = { open = it },
        trigger = { ButtonGroupIconButton("More options", PhosphorIcons.Regular.DotsThree, variant) { open = true } },
        align = PopupAlign.End,
    ) {
        DropdownMenuGroup {
            DropdownMenuItem("Mark as read", onClick = {}, icon = PhosphorIcons.Regular.ListPlus)
            DropdownMenuItem("Archive", onClick = {}, icon = PhosphorIcons.Regular.Archive)
        }
        DropdownMenuSeparator()
        DropdownMenuGroup {
            DropdownMenuItem("Snooze", onClick = {}, icon = PhosphorIcons.Regular.Clock)
            DropdownMenuItem("Add to calendar", onClick = {}, icon = PhosphorIcons.Regular.CalendarPlus)
            DropdownMenuItem("Label as", onClick = {}, icon = PhosphorIcons.Regular.Tag)
        }
        DropdownMenuSeparator()
        DropdownMenuGroup {
            DropdownMenuItem("Trash", onClick = {}, icon = PhosphorIcons.Regular.Trash, variant = MenuItemVariant.Destructive)
        }
    }
}

@Composable
fun ButtonGroupMail(variant: ButtonVariant, separators: Boolean) {
    ButtonGroup {
        ButtonGroup {
            ButtonGroupIconButton("Go back", PhosphorIcons.Regular.ArrowLeft, variant)
        }
        ButtonGroup {
            Button("Archive", onClick = {}, variant = variant)
            if (separators) ButtonGroupSeparator()
            Button("Report", onClick = {}, variant = variant)
        }
        ButtonGroup {
            Button("Snooze", onClick = {}, variant = variant)
            if (separators) ButtonGroupSeparator()
            ButtonGroupMailMenu(variant)
        }
    }
}
```

### Orientation

A vertical group of zoom buttons with a horizontal separator.

![Preview](https://uim.suiss.app/previews/components-button-group--orientation.light.webp)

```tsx
import { MinusIcon, PlusIcon } from "phosphor-react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup, ButtonGroupSeparator } from "@/components/ui/button-group"
import { Icon } from "@/components/ui/icon"

export function ButtonGroupOrientationExample() {
  return (
    <ButtonGroup orientation="vertical" accessibilityLabel="Media controls">
      <Button variant="secondary" size="icon" accessibilityLabel="Zoom in">
        <Icon as={PlusIcon} />
      </Button>
      <ButtonGroupSeparator orientation="horizontal" />
      <Button variant="secondary" size="icon" accessibilityLabel="Zoom out">
        <Icon as={MinusIcon} />
      </Button>
    </ButtonGroup>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupOrientationExample: View {
  var body: some View {
    ButtonGroup(orientation: .vertical) {
      ButtonGroupIconButton(icon: Ph.plus.regular, label: "Zoom in", variant: .secondary)
      ButtonGroupSeparator(.horizontal)
      ButtonGroupIconButton(icon: Ph.minus.regular, label: "Zoom out", variant: .secondary)
    }
    .accessibilityLabel(Text("Media controls"))
  }
}

struct ButtonGroupIcon: View {
  let icon: Image
  let size: VariantButtonStyle.Size

  var body: some View {
    icon.frame(width: size.iconSize, height: size.iconSize)
  }
}

struct ButtonGroupIconButton: View {
  let icon: Image
  let label: LocalizedStringKey
  let variant: VariantButtonStyle.Variant
  var size: VariantButtonStyle.Size = .icon

  var body: some View {
    Button {} label: {
      ButtonGroupIcon(icon: icon, size: size)
    }
    .buttonStyle(.variant(variant, size: size))
    .accessibilityLabel(Text(label))
  }
}
```

```kotlin
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Minus
import com.adamglin.phosphoricons.regular.Plus
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonGroupOrientation
import com.esuiss.ui.components.ButtonGroupSeparator
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon

@Composable
fun ButtonGroupIconButton(
    label: String,
    icon: androidx.compose.ui.graphics.vector.ImageVector,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Icon,
    onClick: () -> Unit = {},
) {
    Button(onClick = onClick, variant = variant, size = size) {
        Icon(icon, contentDescription = label)
    }
}

@Composable
fun ButtonGroupOrientationStory() {
    ButtonGroup(
        modifier = Modifier.semantics { contentDescription = "Media controls" },
        orientation = ButtonGroupOrientation.Vertical,
    ) {
        ButtonGroupIconButton("Zoom in", PhosphorIcons.Regular.Plus, ButtonVariant.Secondary)
        ButtonGroupSeparator(orientation = Orientation.Horizontal)
        ButtonGroupIconButton("Zoom out", PhosphorIcons.Regular.Minus, ButtonVariant.Secondary)
    }
}
```

### Sizes

Groups at different button sizes.

![Preview](https://uim.suiss.app/previews/components-button-group--sizes.light.webp)

```tsx
import { PlusIcon } from "phosphor-react-native"
import { View } from "react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup } from "@/components/ui/button-group"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"

export function ButtonGroupSizesExample() {
  return (
    <View className="items-start gap-6">
      <ButtonGroup>
        <Button variant="outline" size="sm">
          <Text>Small</Text>
        </Button>
        <Button variant="outline" size="sm">
          <Text>Button</Text>
        </Button>
        <Button variant="outline" size="sm">
          <Text>Group</Text>
        </Button>
        <Button variant="outline" size="icon-sm" accessibilityLabel="Add">
          <Icon as={PlusIcon} />
        </Button>
      </ButtonGroup>
      <ButtonGroup>
        <Button variant="outline">
          <Text>Default</Text>
        </Button>
        <Button variant="outline">
          <Text>Button</Text>
        </Button>
        <Button variant="outline">
          <Text>Group</Text>
        </Button>
        <Button variant="outline" size="icon" accessibilityLabel="Add">
          <Icon as={PlusIcon} />
        </Button>
      </ButtonGroup>
      <ButtonGroup>
        <Button variant="outline" size="lg">
          <Text>Large</Text>
        </Button>
        <Button variant="outline" size="lg">
          <Text>Button</Text>
        </Button>
        <Button variant="outline" size="lg">
          <Text>Group</Text>
        </Button>
        <Button variant="outline" size="icon-lg" accessibilityLabel="Add">
          <Icon as={PlusIcon} />
        </Button>
      </ButtonGroup>
    </View>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupSizesExample: View {
  var body: some View {
    VStack(alignment: .leading, spacing: 24) {
      ButtonGroupSizeRow(title: "Small", size: .sm, iconSize: .iconSm)
      ButtonGroupSizeRow(title: "Default", size: .default, iconSize: .icon)
      ButtonGroupSizeRow(title: "Large", size: .lg, iconSize: .iconLg)
    }
  }
}

struct ButtonGroupIcon: View {
  let icon: Image
  let size: VariantButtonStyle.Size

  var body: some View {
    icon.frame(width: size.iconSize, height: size.iconSize)
  }
}

struct ButtonGroupIconButton: View {
  let icon: Image
  let label: LocalizedStringKey
  let variant: VariantButtonStyle.Variant
  var size: VariantButtonStyle.Size = .icon

  var body: some View {
    Button {} label: {
      ButtonGroupIcon(icon: icon, size: size)
    }
    .buttonStyle(.variant(variant, size: size))
    .accessibilityLabel(Text(label))
  }
}

struct ButtonGroupSizeRow: View {
  let title: LocalizedStringKey
  let size: VariantButtonStyle.Size
  let iconSize: VariantButtonStyle.Size

  var body: some View {
    ButtonGroup {
      Button(title) {}.buttonStyle(.variant(.outline, size: size))
      Button("Button") {}.buttonStyle(.variant(.outline, size: size))
      Button("Group") {}.buttonStyle(.variant(.outline, size: size))
      ButtonGroupIconButton(icon: Ph.plus.regular, label: "Add", variant: .outline, size: iconSize)
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.runtime.Composable
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Plus
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon

@Composable
fun ButtonGroupIconButton(
    label: String,
    icon: androidx.compose.ui.graphics.vector.ImageVector,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Icon,
    onClick: () -> Unit = {},
) {
    Button(onClick = onClick, variant = variant, size = size) {
        Icon(icon, contentDescription = label)
    }
}

@Composable
fun ButtonGroupSizes() {
    Column(verticalArrangement = Arrangement.spacedBy(24.dp)) {
        listOf(
            Triple("Small", ButtonSize.Sm, ButtonSize.IconSm),
            Triple("Default", ButtonSize.Default, ButtonSize.Icon),
            Triple("Large", ButtonSize.Lg, ButtonSize.IconLg),
        ).forEach { (label, size, icon) ->
            ButtonGroup {
                Button(label, onClick = {}, variant = ButtonVariant.Outline, size = size)
                Button("Button", onClick = {}, variant = ButtonVariant.Outline, size = size)
                Button("Group", onClick = {}, variant = ButtonVariant.Outline, size = size)
                ButtonGroupIconButton("Add", PhosphorIcons.Regular.Plus, ButtonVariant.Outline, icon)
            }
        }
    }
}
```

### Nested

Groups inside a group, spaced apart.

![Preview](https://uim.suiss.app/previews/components-button-group--nested.light.webp)

```tsx
import { ArrowLeftIcon, ArrowRightIcon } from "phosphor-react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup } from "@/components/ui/button-group"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"

export function ButtonGroupNestedExample() {
  return (
    <ButtonGroup>
      <ButtonGroup>
        {["1", "2", "3", "4", "5"].map((page) => (
          <Button key={page} variant="outline" size="sm">
            <Text>{page}</Text>
          </Button>
        ))}
      </ButtonGroup>
      <ButtonGroup>
        <Button variant="outline" size="icon-sm" accessibilityLabel="Previous">
          <Icon as={ArrowLeftIcon} />
        </Button>
        <Button variant="outline" size="icon-sm" accessibilityLabel="Next">
          <Icon as={ArrowRightIcon} />
        </Button>
      </ButtonGroup>
    </ButtonGroup>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupNestedExample: View {
  var body: some View {
    ButtonGroup {
      ButtonGroup {
        ForEach(["1", "2", "3", "4", "5"], id: \.self) { page in
          Button {} label: { Text(verbatim: page) }
            .buttonStyle(.variant(.outline, size: .sm))
        }
      }
      ButtonGroup {
        ButtonGroupIconButton(icon: Ph.arrowLeft.regular, label: "Previous", variant: .outline, size: .iconSm)
        ButtonGroupIconButton(icon: Ph.arrowRight.regular, label: "Next", variant: .outline, size: .iconSm)
      }
    }
  }
}

struct ButtonGroupIcon: View {
  let icon: Image
  let size: VariantButtonStyle.Size

  var body: some View {
    icon.frame(width: size.iconSize, height: size.iconSize)
  }
}

struct ButtonGroupIconButton: View {
  let icon: Image
  let label: LocalizedStringKey
  let variant: VariantButtonStyle.Variant
  var size: VariantButtonStyle.Size = .icon

  var body: some View {
    Button {} label: {
      ButtonGroupIcon(icon: icon, size: size)
    }
    .buttonStyle(.variant(variant, size: size))
    .accessibilityLabel(Text(label))
  }
}
```

```kotlin
import androidx.compose.runtime.Composable
import androidx.compose.ui.semantics.contentDescription
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.ArrowLeft
import com.adamglin.phosphoricons.regular.ArrowRight
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon

@Composable
fun ButtonGroupIconButton(
    label: String,
    icon: androidx.compose.ui.graphics.vector.ImageVector,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Icon,
    onClick: () -> Unit = {},
) {
    Button(onClick = onClick, variant = variant, size = size) {
        Icon(icon, contentDescription = label)
    }
}

@Composable
fun ButtonGroupNested() {
    ButtonGroup {
        ButtonGroup {
            listOf("1", "2", "3", "4", "5").forEach { page ->
                Button(page, onClick = {}, variant = ButtonVariant.Outline, size = ButtonSize.Sm)
            }
        }
        ButtonGroup {
            ButtonGroupIconButton("Previous", PhosphorIcons.Regular.ArrowLeft, ButtonVariant.Outline, ButtonSize.IconSm)
            ButtonGroupIconButton("Next", PhosphorIcons.Regular.ArrowRight, ButtonVariant.Outline, ButtonSize.IconSm)
        }
    }
}
```

### With separator

Buttons divided by `ButtonGroupSeparator`.

![Preview](https://uim.suiss.app/previews/components-button-group--with-separator.light.webp)

```tsx
import { CopyIcon, ShareIcon } from "phosphor-react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup, ButtonGroupSeparator } from "@/components/ui/button-group"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"

export function ButtonGroupWithSeparatorExample() {
  return (
    <ButtonGroup>
      <Button variant="secondary">
        <Icon as={CopyIcon} />
        <Text>Copy</Text>
      </Button>
      <ButtonGroupSeparator />
      <Button variant="secondary">
        <Icon as={ShareIcon} />
        <Text>Share</Text>
      </Button>
    </ButtonGroup>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupWithSeparatorExample: View {
  var body: some View {
    ButtonGroup {
      Button {} label: {
        Label { Text("Copy") } icon: { Ph.copy.regular }
      }
      .buttonStyle(.variant(.secondary))
      ButtonGroupSeparator()
      Button {} label: {
        Label { Text("Share") } icon: { Ph.share.regular }
      }
      .buttonStyle(.variant(.secondary))
    }
  }
}
```

```kotlin
import androidx.compose.runtime.Composable
import androidx.compose.ui.semantics.contentDescription
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Copy
import com.adamglin.phosphoricons.regular.Share
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonGroupSeparator
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.Text

@Composable
fun ButtonGroupWithSeparator() {
    ButtonGroup {
        Button(onClick = {}, variant = ButtonVariant.Secondary) {
            Icon(PhosphorIcons.Regular.Copy, contentDescription = null)
            Text("Copy")
        }
        ButtonGroupSeparator()
        Button(onClick = {}, variant = ButtonVariant.Secondary) {
            Icon(PhosphorIcons.Regular.Share, contentDescription = null)
            Text("Share")
        }
    }
}
```

### Plain

`plain` buttons, which stay unjoined.

![Preview](https://uim.suiss.app/previews/components-button-group--plain.light.webp)

```tsx
import { ArrowLeftIcon, ArrowRightIcon, ShareIcon } from "phosphor-react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup } from "@/components/ui/button-group"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"

export function ButtonGroupPlainExample() {
  return (
    <ButtonGroup>
      <Button variant="plain">
        <Icon as={ArrowLeftIcon} />
        <Text>Back</Text>
      </Button>
      <Button variant="plain">
        <Text>Forward</Text>
        <Icon as={ArrowRightIcon} />
      </Button>
      <Button variant="plain">
        <Icon as={ShareIcon} />
        <Text>Share</Text>
      </Button>
    </ButtonGroup>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupPlainExample: View {
  var body: some View {
    ButtonGroup {
      Button {} label: {
        Label { Text("Back") } icon: { Ph.arrowLeft.regular }
      }
      .buttonStyle(.variant(.plain))
      Button {} label: {
        HStack(spacing: 6) {
          Text("Forward")
          Ph.arrowRight.regular
            .frame(width: VariantButtonStyle.Size.default.iconSize, height: VariantButtonStyle.Size.default.iconSize)
        }
      }
      .buttonStyle(.variant(.plain))
      Button {} label: {
        Label { Text("Share") } icon: { Ph.share.regular }
      }
      .buttonStyle(.variant(.plain))
    }
  }
}
```

```kotlin
import androidx.compose.runtime.Composable
import androidx.compose.ui.semantics.contentDescription
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.ArrowLeft
import com.adamglin.phosphoricons.regular.ArrowRight
import com.adamglin.phosphoricons.regular.Share
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.Text

@Composable
fun ButtonGroupPlain() {
    ButtonGroup {
        Button(onClick = {}, variant = ButtonVariant.Plain) {
            Icon(PhosphorIcons.Regular.ArrowLeft, contentDescription = null)
            Text("Back")
        }
        Button(onClick = {}, variant = ButtonVariant.Plain) {
            Text("Forward")
            Icon(PhosphorIcons.Regular.ArrowRight, contentDescription = null)
        }
        Button(onClick = {}, variant = ButtonVariant.Plain) {
            Icon(PhosphorIcons.Regular.Share, contentDescription = null)
            Text("Share")
        }
    }
}
```

### Split button

A main action with a joined icon button for more options.

![Preview](https://uim.suiss.app/previews/components-button-group--split-button.light.webp)

```tsx
import { CaretDownIcon } from "phosphor-react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup, ButtonGroupSeparator } from "@/components/ui/button-group"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"

export function ButtonGroupSplitButtonExample() {
  return (
    <ButtonGroup>
      <Button>
        <Text>Publish</Text>
      </Button>
      <ButtonGroupSeparator className="bg-on-accent/30" />
      <Button size="icon" accessibilityLabel="More options">
        <Icon as={CaretDownIcon} />
      </Button>
    </ButtonGroup>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupSplitButtonExample: View {
  var body: some View {
    ButtonGroup {
      Button("Publish") {}.buttonStyle(.variant())
      ButtonGroupSeparator()
      ButtonGroupIconButton(icon: Ph.caretDown.regular, label: "More options", variant: .default)
    }
  }
}

struct ButtonGroupIcon: View {
  let icon: Image
  let size: VariantButtonStyle.Size

  var body: some View {
    icon.frame(width: size.iconSize, height: size.iconSize)
  }
}

struct ButtonGroupIconButton: View {
  let icon: Image
  let label: LocalizedStringKey
  let variant: VariantButtonStyle.Variant
  var size: VariantButtonStyle.Size = .icon

  var body: some View {
    Button {} label: {
      ButtonGroupIcon(icon: icon, size: size)
    }
    .buttonStyle(.variant(variant, size: size))
    .accessibilityLabel(Text(label))
  }
}
```

```kotlin
import androidx.compose.runtime.Composable
import androidx.compose.ui.semantics.contentDescription
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.CaretDown
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonGroupSeparator
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon
import com.esuiss.ui.theme.EsuissTheme

@Composable
fun ButtonGroupIconButton(
    label: String,
    icon: androidx.compose.ui.graphics.vector.ImageVector,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Icon,
    onClick: () -> Unit = {},
) {
    Button(onClick = onClick, variant = variant, size = size) {
        Icon(icon, contentDescription = label)
    }
}

@Composable
fun ButtonGroupSplitButton() {
    ButtonGroup {
        Button("Publish", onClick = {})
        ButtonGroupSeparator(color = EsuissTheme.colors.onAccent.copy(alpha = 0.3f))
        ButtonGroupIconButton("More options", PhosphorIcons.Regular.CaretDown)
    }
}
```

### With input

An input joined to a search button.

![Preview](https://uim.suiss.app/previews/components-button-group--with-input.light.webp)

```tsx
import { MagnifyingGlassIcon } from "phosphor-react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup } from "@/components/ui/button-group"
import { Icon } from "@/components/ui/icon"
import { Input } from "@/components/ui/input"

export function ButtonGroupWithInputExample() {
  return (
    <ButtonGroup className="self-stretch">
      <Input
        accessibilityLabel="Search"
        placeholder="Search..."
        className="w-auto flex-1"
      />
      <Button variant="secondary" size="icon-lg" accessibilityLabel="Search">
        <Icon as={MagnifyingGlassIcon} />
      </Button>
    </ButtonGroup>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupIcon: View {
  let icon: Image
  let size: VariantButtonStyle.Size

  var body: some View {
    icon.frame(width: size.iconSize, height: size.iconSize)
  }
}

struct ButtonGroupIconButton: View {
  let icon: Image
  let label: LocalizedStringKey
  let variant: VariantButtonStyle.Variant
  var size: VariantButtonStyle.Size = .icon

  var body: some View {
    Button {} label: {
      ButtonGroupIcon(icon: icon, size: size)
    }
    .buttonStyle(.variant(variant, size: size))
    .accessibilityLabel(Text(label))
  }
}

struct ButtonGroupWithInputDemo: View {
  @State private var query = ""

  var body: some View {
    ButtonGroup {
      TextField("Search", text: $query, prompt: Text("Search..."))
        .textFieldStyle(.input)
      ButtonGroupIconButton(icon: Ph.magnifyingGlass.regular, label: "Search", variant: .secondary, size: .iconLg)
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.MagnifyingGlass
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.Input

@Composable
fun ButtonGroupIconButton(
    label: String,
    icon: androidx.compose.ui.graphics.vector.ImageVector,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Icon,
    onClick: () -> Unit = {},
) {
    Button(onClick = onClick, variant = variant, size = size) {
        Icon(icon, contentDescription = label)
    }
}

@Composable
fun ButtonGroupWithInput() {
    var search by rememberSaveable { mutableStateOf("") }
    ButtonGroup(Modifier.fillMaxWidth()) {
        Input(
            search,
            { search = it },
            Modifier.semantics { contentDescription = "Search" },
            placeholder = "Search...",
        )
        ButtonGroupIconButton("Search", PhosphorIcons.Regular.MagnifyingGlass, ButtonVariant.Secondary, ButtonSize.IconLg)
    }
}
```

### With input group

An input group joined with buttons.

![Preview](https://uim.suiss.app/previews/components-button-group--with-input-group.light.webp)

```tsx
import { MicrophoneIcon, PlusIcon } from "phosphor-react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup } from "@/components/ui/button-group"
import { Icon } from "@/components/ui/icon"
import { InputGroup, InputGroupAddon, InputGroupButton, InputGroupInput } from "@/components/ui/input-group"

export function ButtonGroupWithInputGroupExample() {
  return (
    <ButtonGroup className="self-stretch">
      <ButtonGroup>
        <Button variant="outline" size="icon-lg" accessibilityLabel="Add">
          <Icon as={PlusIcon} />
        </Button>
      </ButtonGroup>
      <ButtonGroup className="flex-1">
        <InputGroup className="flex-1">
          <InputGroupInput
            accessibilityLabel="Message"
            placeholder="Send a message..."
          />
          <InputGroupAddon align="inline-end">
            <InputGroupButton size="icon-xs" accessibilityLabel="Voice mode">
              <Icon as={MicrophoneIcon} />
            </InputGroupButton>
          </InputGroupAddon>
        </InputGroup>
      </ButtonGroup>
    </ButtonGroup>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupIcon: View {
  let icon: Image
  let size: VariantButtonStyle.Size

  var body: some View {
    icon.frame(width: size.iconSize, height: size.iconSize)
  }
}

struct ButtonGroupIconButton: View {
  let icon: Image
  let label: LocalizedStringKey
  let variant: VariantButtonStyle.Variant
  var size: VariantButtonStyle.Size = .icon

  var body: some View {
    Button {} label: {
      ButtonGroupIcon(icon: icon, size: size)
    }
    .buttonStyle(.variant(variant, size: size))
    .accessibilityLabel(Text(label))
  }
}

struct ButtonGroupWithInputGroupDemo: View {
  @State private var message = ""

  var body: some View {
    ButtonGroup {
      ButtonGroup {
        ButtonGroupIconButton(icon: Ph.plus.regular, label: "Add", variant: .outline, size: .iconLg)
      }
      ButtonGroup {
        InputGroup {
          InputGroupInput("Send a message...", text: $message)
            .accessibilityLabel(Text("Message"))
          InputGroupAddon(align: .inlineEnd) {
            InputGroupButton(size: .iconXs) {} label: {
              Ph.microphone.regular.frame(width: 14, height: 14)
            }
            .accessibilityLabel(Text("Voice mode"))
          }
        }
      }
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.BoxWithConstraints
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.width
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Microphone
import com.adamglin.phosphoricons.regular.Plus
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.InputGroup
import com.esuiss.ui.components.InputGroupAddon
import com.esuiss.ui.components.InputGroupAddonAlign
import com.esuiss.ui.components.InputGroupButton
import com.esuiss.ui.components.InputGroupButtonSize
import com.esuiss.ui.components.InputGroupInput

@Composable
fun ButtonGroupIconButton(
    label: String,
    icon: androidx.compose.ui.graphics.vector.ImageVector,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Icon,
    onClick: () -> Unit = {},
) {
    Button(onClick = onClick, variant = variant, size = size) {
        Icon(icon, contentDescription = label)
    }
}

@Composable
fun ButtonGroupWithInputGroup() {
    var message by rememberSaveable { mutableStateOf("") }
    BoxWithConstraints(Modifier.fillMaxWidth()) {
        val rest = maxWidth - 8.dp - ButtonSize.IconLg.height
        ButtonGroup(Modifier.fillMaxWidth()) {
            ButtonGroup {
                ButtonGroupIconButton("Add", PhosphorIcons.Regular.Plus, ButtonVariant.Outline, ButtonSize.IconLg)
            }
            ButtonGroup(Modifier.width(rest)) {
                InputGroup(Modifier.width(rest)) {
                    InputGroupInput(
                        message,
                        { message = it },
                        Modifier.semantics { contentDescription = "Message" },
                        placeholder = "Send a message...",
                    )
                    InputGroupAddon(align = InputGroupAddonAlign.InlineEnd) {
                        InputGroupButton(onClick = {}, size = InputGroupButtonSize.IconXs) {
                            Icon(PhosphorIcons.Regular.Microphone, contentDescription = "Voice mode")
                        }
                    }
                }
            }
        }
    }
}
```

### With text

A `ButtonGroupText` URL prefix joined to an input and a save button.

![Preview](https://uim.suiss.app/previews/components-button-group--with-text.light.webp)

```tsx
import { LinkIcon } from "phosphor-react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup, ButtonGroupText } from "@/components/ui/button-group"
import { Icon } from "@/components/ui/icon"
import { Input } from "@/components/ui/input"
import { Text } from "@/components/ui/text"

export function ButtonGroupWithTextExample() {
  return (
    <ButtonGroup className="self-stretch">
      <ButtonGroupText>
        <Icon as={LinkIcon} />
        <Text>https://</Text>
      </ButtonGroupText>
      <Input
        accessibilityLabel="Website"
        placeholder="example.com"
        className="w-auto flex-1"
      />
      <Button variant="secondary" size="lg">
        <Text>Save</Text>
      </Button>
    </ButtonGroup>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupWithTextDemo: View {
  @State private var url = ""

  var body: some View {
    ButtonGroup {
      ButtonGroupText {
        Label { Text(verbatim: "https://") } icon: { Ph.link.regular }
      }
      TextField("Website", text: $url, prompt: Text(verbatim: "example.com"))
        .textFieldStyle(.input)
        .keyboardType(.URL)
        .textInputAutocapitalization(.never)
      Button("Save") {}.buttonStyle(.variant(.secondary, size: .lg))
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Link
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonGroupText
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.Input
import com.esuiss.ui.components.Text

@Composable
fun ButtonGroupWithText() {
    var website by rememberSaveable { mutableStateOf("") }
    ButtonGroup(Modifier.fillMaxWidth()) {
        ButtonGroupText {
            Icon(PhosphorIcons.Regular.Link, contentDescription = null)
            Text("https://")
        }
        Input(
            website,
            { website = it },
            Modifier.semantics { contentDescription = "Website" },
            placeholder = "example.com",
        )
        Button("Save", onClick = {}, variant = ButtonVariant.Secondary, size = ButtonSize.Lg)
    }
}
```

### With dropdown menu

A button joined to a dropdown menu trigger.

![Preview](https://uim.suiss.app/previews/components-button-group--with-dropdown-menu.light.webp)

```tsx
import { CaretDownIcon, CopyIcon, ShareIcon, UserCircleMinusIcon, WarningCircleIcon } from "phosphor-react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup } from "@/components/ui/button-group"
import { DropdownMenu, DropdownMenuContent, DropdownMenuGroup, DropdownMenuItem, DropdownMenuSeparator, DropdownMenuTrigger } from "@/components/ui/dropdown-menu"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"

export function ButtonGroupWithDropdownMenuExample() {
  return (
    <ButtonGroup>
      <Button variant="outline">
        <Text>Follow</Text>
      </Button>
      <DropdownMenu>
        <DropdownMenuTrigger
          accessibilityLabel="More options"
          render={<Button variant="outline" size="icon" />}
        >
          <Icon as={CaretDownIcon} />
        </DropdownMenuTrigger>
        <DropdownMenuContent align="end" className="w-56">
          <DropdownMenuGroup>
            <DropdownMenuItem>
              <Icon as={WarningCircleIcon} className="size-4" />
              <Text>Mute conversation</Text>
            </DropdownMenuItem>
            <DropdownMenuItem>
              <Icon as={CopyIcon} className="size-4" />
              <Text>Copy link</Text>
            </DropdownMenuItem>
            <DropdownMenuItem>
              <Icon as={ShareIcon} className="size-4" />
              <Text>Share conversation</Text>
            </DropdownMenuItem>
          </DropdownMenuGroup>
          <DropdownMenuSeparator />
          <DropdownMenuGroup>
            <DropdownMenuItem variant="destructive">
              <Icon as={UserCircleMinusIcon} className="size-4" />
              <Text>Unfollow</Text>
            </DropdownMenuItem>
          </DropdownMenuGroup>
        </DropdownMenuContent>
      </DropdownMenu>
    </ButtonGroup>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupWithDropdownMenuExample: View {
  var body: some View {
    ButtonGroup {
      Button("Follow") {}.buttonStyle(.variant(.outline))
      DropdownMenu(align: .end) {
        DropdownMenuGroup {
          DropdownMenuItem("Mute conversation", icon: Ph.warningCircle.regular) {}
          DropdownMenuItem("Copy link", icon: Ph.copy.regular) {}
          DropdownMenuItem("Share conversation", icon: Ph.share.regular) {}
        }
        DropdownMenuSeparator()
        DropdownMenuGroup {
          DropdownMenuItem("Unfollow", icon: Ph.userCircleMinus.regular, variant: .destructive) {}
        }
      } label: {
        ButtonGroupIcon(icon: Ph.caretDown.regular, size: .icon)
      }
      .buttonStyle(.variant(.outline, size: .icon))
      .accessibilityLabel(Text("More options"))
    }
  }
}

struct ButtonGroupIcon: View {
  let icon: Image
  let size: VariantButtonStyle.Size

  var body: some View {
    icon.frame(width: size.iconSize, height: size.iconSize)
  }
}
```

```kotlin
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.semantics.contentDescription
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.CaretDown
import com.adamglin.phosphoricons.regular.Copy
import com.adamglin.phosphoricons.regular.Share
import com.adamglin.phosphoricons.regular.UserCircleMinus
import com.adamglin.phosphoricons.regular.WarningCircle
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.DropdownMenu
import com.esuiss.ui.components.DropdownMenuGroup
import com.esuiss.ui.components.DropdownMenuItem
import com.esuiss.ui.components.DropdownMenuSeparator
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.MenuItemVariant
import com.esuiss.ui.components.PopupAlign

@Composable
fun ButtonGroupIconButton(
    label: String,
    icon: androidx.compose.ui.graphics.vector.ImageVector,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Icon,
    onClick: () -> Unit = {},
) {
    Button(onClick = onClick, variant = variant, size = size) {
        Icon(icon, contentDescription = label)
    }
}

@Composable
fun ButtonGroupWithDropdownMenu() {
    var open by rememberSaveable { mutableStateOf(false) }
    ButtonGroup {
        Button("Follow", onClick = {}, variant = ButtonVariant.Outline)
        DropdownMenu(
            expanded = open,
            onExpandedChange = { open = it },
            trigger = { ButtonGroupIconButton("More options", PhosphorIcons.Regular.CaretDown, ButtonVariant.Outline) { open = true } },
            align = PopupAlign.End,
        ) {
            DropdownMenuGroup {
                DropdownMenuItem("Mute conversation", onClick = {}, icon = PhosphorIcons.Regular.WarningCircle)
                DropdownMenuItem("Copy link", onClick = {}, icon = PhosphorIcons.Regular.Copy)
                DropdownMenuItem("Share conversation", onClick = {}, icon = PhosphorIcons.Regular.Share)
            }
            DropdownMenuSeparator()
            DropdownMenuGroup {
                DropdownMenuItem(
                    "Unfollow",
                    onClick = {},
                    icon = PhosphorIcons.Regular.UserCircleMinus,
                    variant = MenuItemVariant.Destructive,
                )
            }
        }
    }
}
```

### With select

A select joined to an input for a currency amount.

![Preview](https://uim.suiss.app/previews/components-button-group--with-select.light.webp)

```tsx
import { ArrowRightIcon } from "phosphor-react-native"
import * as React from "react"
import { Button } from "@/components/ui/button"
import { ButtonGroup } from "@/components/ui/button-group"
import { Icon } from "@/components/ui/icon"
import { Input } from "@/components/ui/input"
import { type Option, Select, SelectContent, SelectGroup, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select"

const currencies: Option[] = [
  { value: "usd", label: "$" },
  { value: "eur", label: "€" },
  { value: "gbp", label: "£" },
  { value: "try", label: "₺" },
]

function CurrencyExample() {
  const [value, setValue] = React.useState<string | null>("usd")
  return (
    <ButtonGroup className="self-stretch">
      <ButtonGroup className="flex-1">
        <Select items={currencies} value={value} onValueChange={setValue}>
          <SelectTrigger accessibilityLabel="Currency">
            <SelectValue />
          </SelectTrigger>
          <SelectContent>
            <SelectGroup>
              {currencies.map((currency) => (
                <SelectItem
                  key={currency.value}
                  value={currency.value}
                  label={currency.label}
                />
              ))}
            </SelectGroup>
          </SelectContent>
        </Select>
        <Input
          accessibilityLabel="Amount"
          placeholder="10.00"
          inputMode="decimal"
          className="w-auto flex-1"
        />
      </ButtonGroup>
      <ButtonGroup>
        <Button variant="outline" size="icon-lg" accessibilityLabel="Send">
          <Icon as={ArrowRightIcon} />
        </Button>
      </ButtonGroup>
    </ButtonGroup>
  )
}

export function ButtonGroupWithSelectExample() {
  return (
    <CurrencyExample />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupIcon: View {
  let icon: Image
  let size: VariantButtonStyle.Size

  var body: some View {
    icon.frame(width: size.iconSize, height: size.iconSize)
  }
}

struct ButtonGroupIconButton: View {
  let icon: Image
  let label: LocalizedStringKey
  let variant: VariantButtonStyle.Variant
  var size: VariantButtonStyle.Size = .icon

  var body: some View {
    Button {} label: {
      ButtonGroupIcon(icon: icon, size: size)
    }
    .buttonStyle(.variant(variant, size: size))
    .accessibilityLabel(Text(label))
  }
}

struct ButtonGroupCurrencyDemo: View {
  @State private var currency: String? = "usd"
  @State private var amount = ""

  var body: some View {
    ButtonGroup {
      ButtonGroup {
        SelectField(selection: $currency) {
          SelectGroup {
            SelectItem(verbatim: "$", value: "usd")
            SelectItem(verbatim: "€", value: "eur")
            SelectItem(verbatim: "£", value: "gbp")
            SelectItem(verbatim: "₺", value: "try")
          }
        }
        .frame(width: 76)
        .accessibilityLabel(Text("Currency"))
        TextField("Amount", text: $amount, prompt: Text(verbatim: "10.00"))
          .textFieldStyle(.input)
          .keyboardType(.decimalPad)
      }
      ButtonGroup {
        ButtonGroupIconButton(icon: Ph.arrowRight.regular, label: "Send", variant: .outline, size: .iconLg)
      }
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.BoxWithConstraints
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.input.KeyboardType
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.ArrowRight
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.Input
import com.esuiss.ui.components.Select
import com.esuiss.ui.components.SelectOption

@Composable
fun ButtonGroupIconButton(
    label: String,
    icon: androidx.compose.ui.graphics.vector.ImageVector,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Icon,
    onClick: () -> Unit = {},
) {
    Button(onClick = onClick, variant = variant, size = size) {
        Icon(icon, contentDescription = label)
    }
}

val buttonGroupCurrencies = listOf(
    SelectOption("usd", "$"),
    SelectOption("eur", "€"),
    SelectOption("gbp", "£"),
    SelectOption("try", "₺"),
)

@Composable
fun ButtonGroupWithSelect() {
    var currency by rememberSaveable { mutableStateOf<String?>("usd") }
    var amount by rememberSaveable { mutableStateOf("") }
    BoxWithConstraints(Modifier.fillMaxWidth()) {
        val rest = maxWidth - 8.dp - ButtonSize.IconLg.height
        ButtonGroup(Modifier.fillMaxWidth()) {
            ButtonGroup(Modifier.width(rest)) {
                Select(
                    value = currency,
                    onValueChange = { currency = it },
                    options = buttonGroupCurrencies,
                    modifier = Modifier.semantics { contentDescription = "Currency" },
                )
                Input(
                    amount,
                    { amount = it },
                    Modifier.semantics { contentDescription = "Amount" },
                    placeholder = "10.00",
                    keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
                )
            }
            ButtonGroup {
                ButtonGroupIconButton("Send", PhosphorIcons.Regular.ArrowRight, ButtonVariant.Outline, ButtonSize.IconLg)
            }
        }
    }
}
```

### With popover

A button joined to a popover trigger.

![Preview](https://uim.suiss.app/previews/components-button-group--with-popover.light.webp)

```tsx
import { CaretDownIcon, SparkleIcon } from "phosphor-react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup } from "@/components/ui/button-group"
import { Icon } from "@/components/ui/icon"
import { Popover, PopoverContent, PopoverDescription, PopoverHeader, PopoverTitle, PopoverTrigger } from "@/components/ui/popover"
import { Text } from "@/components/ui/text"
import { Textarea } from "@/components/ui/textarea"

export function ButtonGroupWithPopoverExample() {
  return (
    <ButtonGroup>
      <Button variant="outline">
        <Icon as={SparkleIcon} />
        <Text>Assistant</Text>
      </Button>
      <Popover>
        <PopoverTrigger
          accessibilityLabel="Open popover"
          render={<Button variant="outline" size="icon" />}
        >
          <Icon as={CaretDownIcon} />
        </PopoverTrigger>
        <PopoverContent align="end" className="w-80">
          <PopoverHeader>
            <PopoverTitle>Start a new task</PopoverTitle>
            <PopoverDescription>
              Describe your task in natural language.
            </PopoverDescription>
          </PopoverHeader>
          <Textarea
            accessibilityLabel="Task description"
            placeholder="I need to..."
          />
        </PopoverContent>
      </Popover>
    </ButtonGroup>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupIcon: View {
  let icon: Image
  let size: VariantButtonStyle.Size

  var body: some View {
    icon.frame(width: size.iconSize, height: size.iconSize)
  }
}

struct ButtonGroupPopoverDemo: View {
  @State private var open = false
  @State private var task = ""

  var body: some View {
    ButtonGroup {
      Button {} label: {
        Label { Text("Assistant") } icon: { Ph.sparkle.regular }
      }
      .buttonStyle(.variant(.outline))
      Button { open = true } label: {
        ButtonGroupIcon(icon: Ph.caretDown.regular, size: .icon)
      }
      .buttonStyle(.variant(.outline, size: .icon))
      .accessibilityLabel(Text("Open popover"))
      .popover(isPresented: $open) {
        PopoverContent(width: 320) {
          PopoverHeader {
            PopoverTitle("Start a new task")
            PopoverDescription("Describe your task in natural language.")
          }
          TextField("Task description", text: $task, prompt: Text("I need to..."), axis: .vertical)
            .textFieldStyle(.textarea)
        }
      }
    }
  }
}
```

```kotlin
import androidx.compose.foundation.layout.width
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.CaretDown
import com.adamglin.phosphoricons.regular.Sparkle
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.Popover
import com.esuiss.ui.components.PopoverDescription
import com.esuiss.ui.components.PopoverHeader
import com.esuiss.ui.components.PopoverTitle
import com.esuiss.ui.components.PopupAlign
import com.esuiss.ui.components.Text
import com.esuiss.ui.components.Textarea

@Composable
fun ButtonGroupIconButton(
    label: String,
    icon: androidx.compose.ui.graphics.vector.ImageVector,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Icon,
    onClick: () -> Unit = {},
) {
    Button(onClick = onClick, variant = variant, size = size) {
        Icon(icon, contentDescription = label)
    }
}

@Composable
fun ButtonGroupWithPopover() {
    var open by rememberSaveable { mutableStateOf(false) }
    var task by rememberSaveable { mutableStateOf("") }
    ButtonGroup {
        Button(onClick = {}, variant = ButtonVariant.Outline) {
            Icon(PhosphorIcons.Regular.Sparkle, contentDescription = null)
            Text("Assistant")
        }
        Popover(
            open = open,
            onOpenChange = { open = it },
            trigger = { ButtonGroupIconButton("Open popover", PhosphorIcons.Regular.CaretDown, ButtonVariant.Outline) { open = true } },
            modifier = Modifier.width(320.dp),
            align = PopupAlign.End,
        ) {
            PopoverHeader {
                PopoverTitle("Start a new task")
                PopoverDescription("Describe your task in natural language.")
            }
            Textarea(
                task,
                { task = it },
                Modifier.semantics { contentDescription = "Task description" },
                placeholder = "I need to...",
            )
        }
    }
}
```

### Pagination

Page buttons with previous and next arrows.

![Preview](https://uim.suiss.app/previews/components-button-group--pagination.light.webp)

```tsx
import { CaretLeftIcon, CaretRightIcon } from "phosphor-react-native"
import { Button } from "@/components/ui/button"
import { ButtonGroup } from "@/components/ui/button-group"
import { Icon } from "@/components/ui/icon"
import { Text } from "@/components/ui/text"

export function ButtonGroupPaginationExample() {
  return (
    <ButtonGroup accessibilityLabel="Pagination">
      <Button variant="outline" size="icon" accessibilityLabel="Previous page">
        <Icon as={CaretLeftIcon} />
      </Button>
      <Button variant="outline">
        <Text>1</Text>
      </Button>
      <Button variant="outline" accessibilityState={{ selected: true }}>
        <Text>2</Text>
      </Button>
      <Button variant="outline">
        <Text>3</Text>
      </Button>
      <Button variant="outline" size="icon" accessibilityLabel="Next page">
        <Icon as={CaretRightIcon} />
      </Button>
    </ButtonGroup>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ButtonGroupPaginationExample: View {
  var body: some View {
    ButtonGroup {
      ButtonGroupIconButton(icon: Ph.caretLeft.regular, label: "Previous page", variant: .outline)
      Button {} label: { Text(verbatim: "1") }.buttonStyle(.variant(.outline))
      Button {} label: { Text(verbatim: "2") }
        .buttonStyle(.variant(.outline))
        .accessibilityAddTraits(.isSelected)
      Button {} label: { Text(verbatim: "3") }.buttonStyle(.variant(.outline))
      ButtonGroupIconButton(icon: Ph.caretRight.regular, label: "Next page", variant: .outline)
    }
    .accessibilityLabel(Text("Pagination"))
  }
}

struct ButtonGroupIcon: View {
  let icon: Image
  let size: VariantButtonStyle.Size

  var body: some View {
    icon.frame(width: size.iconSize, height: size.iconSize)
  }
}

struct ButtonGroupIconButton: View {
  let icon: Image
  let label: LocalizedStringKey
  let variant: VariantButtonStyle.Variant
  var size: VariantButtonStyle.Size = .icon

  var body: some View {
    Button {} label: {
      ButtonGroupIcon(icon: icon, size: size)
    }
    .buttonStyle(.variant(variant, size: size))
    .accessibilityLabel(Text(label))
  }
}
```

```kotlin
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.selected
import androidx.compose.ui.semantics.semantics
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.CaretLeft
import com.adamglin.phosphoricons.regular.CaretRight
import com.esuiss.ui.components.Button
import com.esuiss.ui.components.ButtonGroup
import com.esuiss.ui.components.ButtonSize
import com.esuiss.ui.components.ButtonVariant
import com.esuiss.ui.components.Icon

@Composable
fun ButtonGroupIconButton(
    label: String,
    icon: androidx.compose.ui.graphics.vector.ImageVector,
    variant: ButtonVariant = ButtonVariant.Default,
    size: ButtonSize = ButtonSize.Icon,
    onClick: () -> Unit = {},
) {
    Button(onClick = onClick, variant = variant, size = size) {
        Icon(icon, contentDescription = label)
    }
}

@Composable
fun ButtonGroupPagination() {
    ButtonGroup(Modifier.semantics { contentDescription = "Pagination" }) {
        ButtonGroupIconButton("Previous page", PhosphorIcons.Regular.CaretLeft, ButtonVariant.Outline)
        Button("1", onClick = {}, variant = ButtonVariant.Outline)
        Button("2", onClick = {}, modifier = Modifier.semantics { selected = true }, variant = ButtonVariant.Outline)
        Button("3", onClick = {}, variant = ButtonVariant.Outline)
        ButtonGroupIconButton("Next page", PhosphorIcons.Regular.CaretRight, ButtonVariant.Outline)
    }
}
```

## API Reference

### ButtonGroup

Container that joins its children.

### ButtonGroupText

Pill-shaped label or icon slot.

### ButtonGroupSeparator

Divider between joined buttons.

## Accessibility

- The container has the `group` role.
- Each button keeps its own role and state.
- Icon-only buttons need an `accessibilityLabel`.

## Notes

- Uses `bg-control` for `ButtonGroupText` and a translucent label color for separators; light and dark follow the system appearance.