# Line Chart Linear

A single line drawn with straight segments between readings instead of a smoothed curve.

Line 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/line-chart-linear

**React**

**Example**

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

import { CartesianGrid, Line, LineChart, 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 LineChartLinear() {
  return (
    <Card variant="filled" size="sm">
      <CardHeader>
        <CardTitle>Linear</CardTitle>
        <CardDescription>Straight lines between readings</CardDescription>
      </CardHeader>
      <CardContent>
        <ChartContainer
          config={chartConfig}
          className="aspect-auto h-48 w-full"
        >
          <LineChart
            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 hideLabel />} />
            <Line
              dataKey="desktop"
              type="linear"
              stroke="var(--color-desktop)"
              strokeWidth={2.5}
              dot={false}
            />
          </LineChart>
        </ChartContainer>
      </CardContent>
    </Card>
  )
}
```

One series joined by straight segments instead of a smoothed curve. Prefer it to the default when smoothing would imply values between readings that were never measured.

## Installation

### CLI

```bash title="Terminal"
npx shadcn@latest add @esuiss/line-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 line-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/line-chart-linear.tsx`:

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

import { CartesianGrid, Line, LineChart, 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 LineChartLinear() {
  return (
    <Card variant="filled" size="sm">
      <CardHeader>
        <CardTitle>Linear</CardTitle>
        <CardDescription>Straight lines between readings</CardDescription>
      </CardHeader>
      <CardContent>
        <ChartContainer
          config={chartConfig}
          className="aspect-auto h-48 w-full"
        >
          <LineChart
            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 hideLabel />} />
            <Line
              dataKey="desktop"
              type="linear"
              stroke="var(--color-desktop)"
              strokeWidth={2.5}
              dot={false}
            />
          </LineChart>
        </ChartContainer>
      </CardContent>
    </Card>
  )
}
```

4. Update the import paths to match your project.

## Usage

```tsx
import { LineChartLinear } from "@/components/charts/line-chart-linear"
```

```tsx
<LineChartLinear />
```

Replace `chartData`, update each `dataKey` and set the label and color in `chartConfig`. Everything else matches the default line chart.

## Notes

Keyboard users can focus the chart and move between points with the arrow keys.

**React Native, SwiftUI, Jetpack Compose**

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

```tsx title="uniwind/components/charts/line-chart-linear.tsx"
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  CartesianGrid,
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,
  Line,
  LineChart,
  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 LineChartLinear() {
  return (
    <Card variant="filled" size="sm">
      <CardHeader>
        <CardTitle>Linear</CardTitle>
        <CardDescription>Straight lines between readings</CardDescription>
      </CardHeader>
      <CardContent>
        <ChartContainer
          config={chartConfig}
          accessibilityLabel="Linear"
          className="h-48 w-full"
        >
          <LineChart
            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 hideLabel />} />
            <Line dataKey="desktop" type="linear" strokeWidth={2.5} />
          </LineChart>
        </ChartContainer>
      </CardContent>
    </Card>
  )
}
```

```swift title="swift/Charts/LineChartLinear.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 LineChartLinear: View {
  @State private var selection: Int?

  public init() {}

  public var body: some View {
    Card(.filled, size: .sm) {
      CardHeader("Linear", description: "Straight lines between readings")
      CardContent {
        ChartContainer(config: chartConfig) {
          ChartAnimator { progress in
            Chart {
              ForEach(chartData.indices, id: \.self) { index in
                LineMark(x: .value("Month", index), y: .value("Desktop", chartData[index].desktop))
                  .interpolationMethod(.linear)
                  .lineStyle(StrokeStyle(lineWidth: 2.5, 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, hideLabel: true)
            }
          }
        }
        .frame(height: 192)
      }
    }
  }
}
```

```kt title="kotlin/charts/LineChartLinear.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.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.ChartMargin
import com.esuiss.ui.components.ChartTooltipContent
import com.esuiss.ui.components.LineChart

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

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

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

@Composable
fun LineChartLinear(modifier: Modifier = Modifier) {
    Card(modifier, variant = CardVariant.Filled, size = CardSize.Sm) {
        CardHeader("Linear", description = "Straight lines between readings")
        CardContent {
            ChartContainer(
                chartConfig,
                Modifier
                    .fillMaxWidth()
                    .height(192.dp),
            ) {
                LineChart(
                    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(hideLabel = true) }
                    Line("desktop", value = { it.desktop }, curve = ChartCurve.Linear, strokeWidth = 2.5.dp)
                }
            }
        }
    }
}
```

One series 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.

## Installation

**React Native**

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

**SwiftUI**

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

**Jetpack Compose**

```bash title="Terminal"
npx @esuiss/ui@latest add line-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/line-chart-linear.tsx`:

- `uniwind/components/charts/line-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/line-chart-linear.tsx`:

```tsx title="nativewind/components/charts/line-chart-linear.tsx"
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  CartesianGrid,
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,
  Line,
  LineChart,
  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 LineChartLinear() {
  return (
    <Card variant="filled" size="sm">
      <CardHeader>
        <CardTitle>Linear</CardTitle>
        <CardDescription>Straight lines between readings</CardDescription>
      </CardHeader>
      <CardContent>
        <ChartContainer
          config={chartConfig}
          accessibilityLabel="Linear"
          className="h-48 w-full"
        >
          <LineChart
            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 hideLabel />} />
            <Line dataKey="desktop" type="linear" strokeWidth={2.5} />
          </LineChart>
        </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/line-chart-linear.tsx`:

```tsx title="stylesheet/components/charts/line-chart-linear.tsx"
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card"
import {
  CartesianGrid,
  type ChartConfig,
  ChartContainer,
  ChartTooltip,
  ChartTooltipContent,
  Line,
  LineChart,
  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 LineChartLinear() {
  return (
    <Card variant="filled" size="sm">
      <CardHeader>
        <CardTitle>Linear</CardTitle>
        <CardDescription>Straight lines between readings</CardDescription>
      </CardHeader>
      <CardContent>
        <ChartContainer
          config={chartConfig}
          accessibilityLabel="Linear"
          style={{ height: 192 }}
        >
          <LineChart
            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 hideLabel />} />
            <Line dataKey="desktop" type="linear" strokeWidth={2.5} />
          </LineChart>
        </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/LineChartLinear.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/LineChartLinear.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 { LineChartLinear } from "@/components/charts/line-chart-linear"
```

```tsx
<LineChartLinear />
```

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