# Area Chart Linear

A single filled area whose points are joined by straight segments instead of a smoothed curve.

Area Chart Linear is an open-source chart from suiss/ui for React, React Native, SwiftUI and Jetpack Compose. The @esuiss/ui CLI copies its source into your project, so you own the code.

Source: https://ui.suiss.app/docs/charts/area-chart-linear

**React**

**Example**

```tsx title="components/charts/area-chart-linear.tsx"
"use client"

import { Area, AreaChart, CartesianGrid, XAxis } from "recharts"

import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,
} from "@/components/ui/chart"

const chartData = [
  { month: "January", desktop: 186, mobile: 80 },
  { month: "February", desktop: 305, mobile: 200 },
  { month: "March", desktop: 237, mobile: 120 },
  { month: "April", desktop: 173, mobile: 190 },
  { month: "May", desktop: 209, mobile: 130 },
  { month: "June", desktop: 264, mobile: 140 },
]

const chartConfig = {
  desktop: { label: "Desktop", color: "var(--chart-1)" },
} satisfies ChartConfig

export function AreaChartLinear() {
  return (
    <Card variant="filled" size="sm">
      <CardHeader>
        <CardTitle>Linear</CardTitle>
        <CardDescription>Points joined by straight lines</CardDescription>
      </CardHeader>
      <CardContent>
        <ChartContainer
          config={chartConfig}
          className="aspect-auto h-48 w-full"
        >
          <AreaChart
            accessibilityLayer
            data={chartData}
            margin={{ top: 10, right: 12, left: 12, bottom: 0 }}
          >
            <CartesianGrid vertical={false} strokeDasharray="2 4" />
            <XAxis
              dataKey="month"
              tickLine={false}
              axisLine={false}
              tickMargin={8}
              interval={0}
              tickFormatter={(value: string) => value.slice(0, 3)}
            />
            <ChartTooltip content={<ChartTooltipContent indicator="line" />} />
            <Area
              dataKey="desktop"
              type="linear"
              stroke="var(--color-desktop)"
              strokeWidth={2}
              fill="var(--color-desktop)"
              fillOpacity={0.18}
            />
          </AreaChart>
        </ChartContainer>
      </CardContent>
    </Card>
  )
}
```

One series filled under straight line segments instead of a smoothed curve. Prefer it to the default when smoothing would suggest values between points that were never measured.

## Installation

### CLI

```bash title="Terminal"
npx shadcn@latest add @esuiss/area-chart-linear
```

Works in any project with a `components.json`. See [Installation](https://ui.suiss.app/docs/installation#add-components) for the one-line registry setup. Or use the suiss/ui CLI:

```bash title="Terminal"
npx @esuiss/ui@latest add charts area-chart-linear
```

### Manual

1. Install the dependencies:

```bash title="Terminal"
npm install recharts
```

2. Add the pieces it builds on: [Card](https://ui.suiss.app/docs/components/card), [Chart](https://ui.suiss.app/docs/components/chart).

3. Copy the source into `components/charts/area-chart-linear.tsx`:

```tsx title="components/charts/area-chart-linear.tsx"
"use client"

import { Area, AreaChart, CartesianGrid, XAxis } from "recharts"

import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,
} from "@/components/ui/chart"

const chartData = [
  { month: "January", desktop: 186, mobile: 80 },
  { month: "February", desktop: 305, mobile: 200 },
  { month: "March", desktop: 237, mobile: 120 },
  { month: "April", desktop: 173, mobile: 190 },
  { month: "May", desktop: 209, mobile: 130 },
  { month: "June", desktop: 264, mobile: 140 },
]

const chartConfig = {
  desktop: { label: "Desktop", color: "var(--chart-1)" },
} satisfies ChartConfig

export function AreaChartLinear() {
  return (
    <Card variant="filled" size="sm">
      <CardHeader>
        <CardTitle>Linear</CardTitle>
        <CardDescription>Points joined by straight lines</CardDescription>
      </CardHeader>
      <CardContent>
        <ChartContainer
          config={chartConfig}
          className="aspect-auto h-48 w-full"
        >
          <AreaChart
            accessibilityLayer
            data={chartData}
            margin={{ top: 10, right: 12, left: 12, bottom: 0 }}
          >
            <CartesianGrid vertical={false} strokeDasharray="2 4" />
            <XAxis
              dataKey="month"
              tickLine={false}
              axisLine={false}
              tickMargin={8}
              interval={0}
              tickFormatter={(value: string) => value.slice(0, 3)}
            />
            <ChartTooltip content={<ChartTooltipContent indicator="line" />} />
            <Area
              dataKey="desktop"
              type="linear"
              stroke="var(--color-desktop)"
              strokeWidth={2}
              fill="var(--color-desktop)"
              fillOpacity={0.18}
            />
          </AreaChart>
        </ChartContainer>
      </CardContent>
    </Card>
  )
}
```

4. Update the import paths to match your project.

## Usage

```tsx
import { AreaChartLinear } from "@/components/charts/area-chart-linear"
```

```tsx
<AreaChartLinear />
```

Replace `chartData`, update each `dataKey` to your field names and rename the `chartConfig` entry to set the label and color. Everything else matches the default area chart.

## Notes

Keyboard users can focus the plot and step through the months with the arrow keys.

**React Native, SwiftUI, Jetpack Compose**

![Preview](https://ui.suiss.app/previews/charts-area--linear.light.webp)

```tsx title="uniwind/components/charts/area-chart-linear.tsx"
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  Area,
  AreaChart,
  CartesianGrid,
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,
  XAxis,
} from "@/components/ui/chart"

const chartData = [
  { month: "January", desktop: 186, mobile: 80 },
  { month: "February", desktop: 305, mobile: 200 },
  { month: "March", desktop: 237, mobile: 120 },
  { month: "April", desktop: 173, mobile: 190 },
  { month: "May", desktop: 209, mobile: 130 },
  { month: "June", desktop: 264, mobile: 140 },
]

const chartConfig = {
  desktop: { label: "Desktop", color: "chart-1" },
} satisfies ChartConfig

export function AreaChartLinear() {
  return (
    <Card variant="filled" size="sm">
      <CardHeader>
        <CardTitle>Linear</CardTitle>
        <CardDescription>Points joined by straight lines</CardDescription>
      </CardHeader>
      <CardContent>
        <ChartContainer
          config={chartConfig}
          accessibilityLabel="Linear"
          className="h-48 w-full"
        >
          <AreaChart
            data={chartData}
            margin={{ top: 10, right: 12, left: 12, bottom: 0 }}
          >
            <CartesianGrid vertical={false} strokeDasharray="2 4" />
            <XAxis
              dataKey="month"
              tickMargin={8}
              interval={0}
              tickFormatter={(value: string) => value.slice(0, 3)}
            />
            <ChartTooltip content={<ChartTooltipContent indicator="line" />} />
            <Area
              dataKey="desktop"
              type="linear"
              strokeWidth={2}
              fillOpacity={0.18}
            />
          </AreaChart>
        </ChartContainer>
      </CardContent>
    </Card>
  )
}
```

```swift title="swift/Charts/AreaChartLinear.swift"
import Charts
import SwiftUI

private let chartData: [(month: String, desktop: Double, mobile: Double)] = [
  ("January", 186, 80),
  ("February", 305, 200),
  ("March", 237, 120),
  ("April", 173, 190),
  ("May", 209, 130),
  ("June", 264, 140),
]

private let chartConfig: ChartConfig = [
  "desktop": .init("Desktop", color: EsuissColor.chart1),
]

public struct AreaChartLinear: View {
  @State private var selection: Int?

  public init() {}

  public var body: some View {
    Card(.filled, size: .sm) {
      CardHeader("Linear", description: "Points joined by straight lines")
      CardContent {
        ChartContainer(config: chartConfig) {
          ChartAnimator { progress in
            Chart {
              ForEach(chartData.indices, id: \.self) { index in
                AreaMark(x: .value("Month", index), y: .value("Desktop", chartData[index].desktop))
                  .interpolationMethod(.linear)
                  .foregroundStyle(chartConfig.color("desktop").opacity(0.18))
                LineMark(x: .value("Month", index), y: .value("Desktop", chartData[index].desktop))
                  .interpolationMethod(.linear)
                  .lineStyle(StrokeStyle(lineWidth: 2, lineCap: .round, lineJoin: .round))
                  .foregroundStyle(chartConfig.color("desktop"))
              }
              .chartReveal(progress, x: 0...(chartData.count - 1))
              if let selection {
                PointMark(x: .value("Month", selection), y: .value("Desktop", chartData[selection].desktop))
                  .symbolSize(64)
                  .foregroundStyle(chartConfig.color("desktop"))
              }
            }
            .chartXScale(domain: 0...(chartData.count - 1), range: .plotDimension(padding: 12))
            .chartXAxis { ChartAxis.x(values: Array(chartData.indices)) { String(chartData[$0].month.prefix(3)) } }
            .chartYAxis { ChartAxis.grid() }
            .chartTooltip(
              x: Array(chartData.indices),
              labels: chartData.map(\.month),
              selection: $selection,
              accessibilityLabel: "Linear",
              items: { [ChartTooltipItem("desktop", value: chartData[$0].desktop)] }
            ) { payload in
              ChartTooltipContent(payload, indicator: .line)
            }
          }
        }
        .frame(height: 192)
      }
    }
  }
}
```

```kt title="kotlin/charts/AreaChartLinear.kt"
package com.esuiss.ui.charts

import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import com.esuiss.ui.components.AreaChart
import com.esuiss.ui.components.Card
import com.esuiss.ui.components.CardContent
import com.esuiss.ui.components.CardHeader
import com.esuiss.ui.components.CardSize
import com.esuiss.ui.components.CardVariant
import com.esuiss.ui.components.ChartConfig
import com.esuiss.ui.components.ChartConfigItem
import com.esuiss.ui.components.ChartContainer
import com.esuiss.ui.components.ChartCurve
import com.esuiss.ui.components.ChartFill
import com.esuiss.ui.components.ChartMargin
import com.esuiss.ui.components.ChartTooltipContent
import com.esuiss.ui.components.ChartTooltipIndicator

private class AreaLinearRow(val month: String, val desktop: Double, val mobile: Double)

private val chartData = listOf(
    AreaLinearRow("January", 186.0, 80.0),
    AreaLinearRow("February", 305.0, 200.0),
    AreaLinearRow("March", 237.0, 120.0),
    AreaLinearRow("April", 173.0, 190.0),
    AreaLinearRow("May", 209.0, 130.0),
    AreaLinearRow("June", 264.0, 140.0),
)

private val chartConfig = ChartConfig(
    "desktop" to ChartConfigItem("Desktop") { chart1 },
)

@Composable
fun AreaChartLinear(modifier: Modifier = Modifier) {
    Card(modifier, variant = CardVariant.Filled, size = CardSize.Sm) {
        CardHeader("Linear", description = "Points joined by straight lines")
        CardContent {
            ChartContainer(
                chartConfig,
                Modifier
                    .fillMaxWidth()
                    .height(192.dp),
            ) {
                AreaChart(
                    chartData,
                    margin = ChartMargin(top = 10.dp, right = 12.dp, bottom = 0.dp, left = 12.dp),
                    accessibilityLabel = "Linear",
                ) {
                    CartesianGrid(strokeDasharray = listOf(2f, 4f))
                    XAxis(label = { it.month }, tickMargin = 8.dp, interval = 0, tickFormatter = { it.take(3) })
                    ChartTooltip { ChartTooltipContent(indicator = ChartTooltipIndicator.Line) }
                    Area(
                        "desktop",
                        value = { it.desktop },
                        curve = ChartCurve.Linear,
                        strokeWidth = 2.dp,
                        fill = ChartFill.Solid(alpha = 0.18f),
                    )
                }
            }
        }
    }
}
```

The same one-series area as the default chart, with `type="linear"` so each month connects to the next with a straight segment. It has a month axis, a dashed grid and a tooltip with a line indicator.

## Installation

**React Native**

```bash title="Terminal"
npx shadcn@latest add @esuiss-rn/area-chart-linear
```

See [Installation](https://ui.suiss.app/docs/installation) for the `components.json` setup. Or use the suiss/ui CLI:

```bash title="Terminal"
npx @esuiss/ui@latest add area-chart-linear
```

**SwiftUI**

```bash title="Terminal"
npx @esuiss/ui@latest add area-chart-linear --platform swift
```

**Jetpack Compose**

```bash title="Terminal"
npx @esuiss/ui@latest add area-chart-linear --platform kotlin
```

The CLI also adds what it builds on: [Card](https://ui.suiss.app/docs/components/card), [Chart](https://ui.suiss.app/docs/components/chart).

### Manual

**React Native**

**Uniwind**

1. Add the pieces it builds on: [Card](https://ui.suiss.app/docs/components/card), [Chart](https://ui.suiss.app/docs/components/chart).

2. Copy the source into `components/charts/area-chart-linear.tsx`:

- `uniwind/components/charts/area-chart-linear.tsx`: shown above

3. Update the import paths to match your project.

**NativeWind**

1. Add the pieces it builds on: [Card](https://ui.suiss.app/docs/components/card), [Chart](https://ui.suiss.app/docs/components/chart).

2. Copy the source into `components/charts/area-chart-linear.tsx`:

```tsx title="nativewind/components/charts/area-chart-linear.tsx"
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  Area,
  AreaChart,
  CartesianGrid,
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,
  XAxis,
} from "@/components/ui/chart"

const chartData = [
  { month: "January", desktop: 186, mobile: 80 },
  { month: "February", desktop: 305, mobile: 200 },
  { month: "March", desktop: 237, mobile: 120 },
  { month: "April", desktop: 173, mobile: 190 },
  { month: "May", desktop: 209, mobile: 130 },
  { month: "June", desktop: 264, mobile: 140 },
]

const chartConfig = {
  desktop: { label: "Desktop", color: "chart-1" },
} satisfies ChartConfig

export function AreaChartLinear() {
  return (
    <Card variant="filled" size="sm">
      <CardHeader>
        <CardTitle>Linear</CardTitle>
        <CardDescription>Points joined by straight lines</CardDescription>
      </CardHeader>
      <CardContent>
        <ChartContainer
          config={chartConfig}
          accessibilityLabel="Linear"
          className="h-48 w-full"
        >
          <AreaChart
            data={chartData}
            margin={{ top: 10, right: 12, left: 12, bottom: 0 }}
          >
            <CartesianGrid vertical={false} strokeDasharray="2 4" />
            <XAxis
              dataKey="month"
              tickMargin={8}
              interval={0}
              tickFormatter={(value: string) => value.slice(0, 3)}
            />
            <ChartTooltip content={<ChartTooltipContent indicator="line" />} />
            <Area
              dataKey="desktop"
              type="linear"
              strokeWidth={2}
              fillOpacity={0.18}
            />
          </AreaChart>
        </ChartContainer>
      </CardContent>
    </Card>
  )
}
```

3. Update the import paths to match your project.

**StyleSheet**

1. Add the pieces it builds on: [Card](https://ui.suiss.app/docs/components/card), [Chart](https://ui.suiss.app/docs/components/chart).

2. Copy the source into `components/charts/area-chart-linear.tsx`:

```tsx title="stylesheet/components/charts/area-chart-linear.tsx"
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  Area,
  AreaChart,
  CartesianGrid,
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,
  XAxis,
} from "@/components/ui/chart"

const chartData = [
  { month: "January", desktop: 186, mobile: 80 },
  { month: "February", desktop: 305, mobile: 200 },
  { month: "March", desktop: 237, mobile: 120 },
  { month: "April", desktop: 173, mobile: 190 },
  { month: "May", desktop: 209, mobile: 130 },
  { month: "June", desktop: 264, mobile: 140 },
]

const chartConfig = {
  desktop: { label: "Desktop", color: "chart-1" },
} satisfies ChartConfig

export function AreaChartLinear() {
  return (
    <Card variant="filled" size="sm">
      <CardHeader>
        <CardTitle>Linear</CardTitle>
        <CardDescription>Points joined by straight lines</CardDescription>
      </CardHeader>
      <CardContent>
        <ChartContainer
          config={chartConfig}
          accessibilityLabel="Linear"
          style={{ height: 192 }}
        >
          <AreaChart
            data={chartData}
            margin={{ top: 10, right: 12, left: 12, bottom: 0 }}
          >
            <CartesianGrid vertical={false} strokeDasharray="2 4" />
            <XAxis
              dataKey="month"
              tickMargin={8}
              interval={0}
              tickFormatter={(value: string) => value.slice(0, 3)}
            />
            <ChartTooltip content={<ChartTooltipContent indicator="line" />} />
            <Area
              dataKey="desktop"
              type="linear"
              strokeWidth={2}
              fillOpacity={0.18}
            />
          </AreaChart>
        </ChartContainer>
      </CardContent>
    </Card>
  )
}
```

3. Update the import paths to match your project.

**SwiftUI**

1. Target iOS 17 or later.

2. Copy the theme files every view uses:

- `swift/Theme/Theme.swift`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/swiftui/Sources/EsuissUI/Theme/Theme.swift)

- `swift/Theme/Tokens.swift`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/swiftui/Sources/EsuissUI/Theme/Tokens.swift)

3. Copy the source and every file it uses:

- `swift/Charts/AreaChartLinear.swift`: shown above

- `swift/Components/Card.swift`: see [Card](https://ui.suiss.app/docs/components/card.md)

- `swift/Components/Chart.swift`: see [Chart](https://ui.suiss.app/docs/components/chart.md)

- `swift/Components/Haptics.swift`: see [Haptics](https://ui.suiss.app/docs/components/haptics.md)

- `swift/Components/Item.swift`: see [Item](https://ui.suiss.app/docs/components/item.md)

- `swift/Components/Separator.swift`: see [Separator](https://ui.suiss.app/docs/components/separator.md)

- `swift/Components/TextVariant.swift`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/swiftui/Sources/EsuissUI/Components/TextVariant.swift)

4. 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:

- `kotlin/theme/Theme.kt`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/kotlin/ui/src/main/kotlin/com/esuiss/ui/theme/Theme.kt)

- `kotlin/theme/Tokens.kt`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/kotlin/ui/src/main/kotlin/com/esuiss/ui/theme/Tokens.kt)

3. Copy the source and every file it uses:

- `kotlin/charts/AreaChartLinear.kt`: shown above

- `kotlin/components/Card.kt`: see [Card](https://ui.suiss.app/docs/components/card.md)

- `kotlin/components/Chart.kt`: see [Chart](https://ui.suiss.app/docs/components/chart.md)

- `kotlin/components/Content.kt`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/kotlin/ui/src/main/kotlin/com/esuiss/ui/components/Content.kt)

- `kotlin/components/FormSupport.kt`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/kotlin/ui/src/main/kotlin/com/esuiss/ui/components/FormSupport.kt)

- `kotlin/components/Haptics.kt`: see [Haptics](https://ui.suiss.app/docs/components/haptics.md)

- `kotlin/components/Icon.kt`: see [Icon](https://ui.suiss.app/docs/components/icon.md)

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

## Usage

```tsx
import { AreaChartLinear } from "@/components/charts/area-chart-linear"
```

```tsx
<AreaChartLinear />
```

Replace `chartData` with your records and change each `dataKey` to match your fields. Set the label and color of the series in `chartConfig`. The component takes no props.