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Charts

Free

Linear Line Chart

Q: How do I get sharp corners?

lineY rounds its joins by default (lineJoin: "round"), which softens each corner a little. Set lineJoin: "miter" for pointed corners, or "bevel" to cut them flat.

Q: How do I mark each reading?

Add points: true to lineY for a small dot on every reading, or a dot mark over the same rows when you want to size and color them, as the Line Chart with Dots does.

Q: What happens with a missing month?

A row whose y is null or undefined breaks the line: lineY ends the segment there and starts a new one at the next valid row. That's usually right for missing data. Filter the row out instead if you want the line to bridge the gap.

Q: Can I mix a straight line and a curve on one chart?

Yes. curve belongs to each line mark, so a measured series can stay straight while a projection beside it uses a natural curve and a strokeDasharray.

A line drawn as straight segments from month to month, so it never hints at values between two readings. For Vue, drawn with TanStack Charts.

PreviewCode

About

Pick it over the smooth line when the readings are all you know: monthly snapshots, prices, counts. Straight segments promise nothing between two months, while a curve can bulge above the highest reading. The corners also make each month easy to find without dots.

Six monthly values joined by straight strokes, over horizontal grid lines, with three-letter months below. The tooltip shows the value without the month.

Installation

Free with an account. It carries your token, so the CLI installs everything in one go.

Google GitHub

Use email insteadNo credit card

Usage

<script setup lang="ts">
import ChartLineLinear from "@/components/charts/chart-line-linear.vue";
</script>

<template>
  <ChartLineLinear />
</template>

Customize

Leaving out curve is the only change from the smooth Line Chart: without one, lineY joins the points with straight segments.
lineJoin defaults to "round", which softens each corner. Set lineJoin: "miter" for sharp angles.
The rows are { month, desktop }, and the stroke is var(--color-desktop) from chartConfig.desktop, 2px wide.
points: true puts a small dot on every reading, the quickest way to show where the data actually is.
ChartContainer's tooltip passes { hideLabel: true }: the value alone, since the month sits right under the point.

FAQ

When should I use straight segments instead of a curve?

When the points are measurements and nothing is known between them: prices, inventory, survey results. A natural curve rounds every turn and can bulge past a point, which reads as a value that never happened. Curves suit overviews where the general shape matters more than each reading.

How do I get sharp corners?

lineY rounds its joins by default (lineJoin: "round"), which softens each corner a little. Set lineJoin: "miter" for pointed corners, or "bevel" to cut them flat.

How do I mark each reading?

Add points: true to lineY for a small dot on every reading, or a dot mark over the same rows when you want to size and color them, as the Line Chart with Dots does.

What happens with a missing month?

A row whose y is null or undefined breaks the line: lineY ends the segment there and starts a new one at the next valid row. That's usually right for missing data. Filter the row out instead if you want the line to bridge the gap.

Can I mix a straight line and a curve on one chart?

Yes. curve belongs to each line mark, so a measured series can stay straight while a projection beside it uses a natural curve and a strokeDasharray.

Can people reach each month without a mouse?

Yes. Tab focuses the chart, the arrow keys move from point to point, and Home and End jump to January and June. Each move updates the tooltip, which screen readers announce politely.

API Reference

ChartContainer

<div> data-slot="chart"

PropType

configChartConfig

Each series' label, icon and color, read by the tooltip and the legend.

definitionChartDefinition

The chart: defineChart(spec, chartTooltip()), its data, marks, scales and axes, and the tooltip's focus.

ariaLabelstring

The chart's accessible name: the card's title.

ariaDescription?string

The chart's accessible description.

class?string

The container's size: aspect-auto h-[250px] w-full, mx-auto aspect-square max-h-[250px]. It's aspect-video by default.

#default?slot

What sits under the chart inside the container: a ChartLegend.

tooltip?(ChartTooltipContentOptions & { class?: string }) | false

ChartTooltipContent's options (indicator, hideLabel, labelFormatter…) for the default body, or false for TanStack's own tooltip body.

Type: (ChartTooltipContentOptions & { class?: string }) | false

#tooltip?slot (ChartTooltipBodySlotContext)

A whole tooltip body of your own, in place of ChartTooltipContent: it gets the focused points (each with its datum, group and color). A scoped slot.

Type: slot (ChartTooltipBodySlotContext)

defaultIndex?number

The category whose tooltip shows before any pointer, as Recharts' defaultIndex.

height?number

A fixed height in pixels for the chart, in place of the container's.

aspectRatio?number

A width-to-height ratio for the chart, in place of the container's height.

initialWidth?number

The width the chart renders at before it's measured.

EventType

@focus-change?(point: ChartPoint | null) => void

Called as the focused point changes: a pointer, a key or a tap.

Type: (point: ChartPoint | null) => void

@focus-group-change?(points: readonly ChartPoint[]) => void

Called with every point at the focused category (a stacked or grouped chart's).

Type: (points: readonly ChartPoint[]) => void

@select?(point: ChartPoint | null) => void

Called when a point is clicked or picked with Enter.

Type: (point: ChartPoint | null) => void

CSS variableType

--color-<key>?color

Each config key's color (its theme color in light and dark), set on the container: the marks paint with var(--color-<key>).

ChartTooltipContent

<div>

PropType

pointsreadonly ChartPoint[]

The focused points, from the tooltip's context. ChartContainer passes them to its default body; a body of your own passes its context's.

indicator?"dot" | "line" | "dashed"

The indicator's shape beside each row.

Type: "dot" | "line" | "dashed"
Default: "dot"

hideLabel?boolean

Hides the label above the rows (the focused category).

Default: false

hideIndicator?boolean

Hides each row's color indicator.

Default: false

label?string

The label's text in place of the focused category, looked up in config.

labelKey?string

The datum field (or config key) the label is read from, looked up in config.

nameKey?string

The datum field (or config key) each row's series is read from: a pie's browser.

valueKey?string

The datum field each row's value is read from, for points that carry geometry rather than values (a pie's, from pie()).

color?string

One indicator color for every row, in place of each series' own.

labelFormatter?(label: string, points: readonly ChartPoint[]) => string

Formats the label (the config's label or the category), with the rows' points: a date written out, a unit.

Type: (label: string, points: readonly ChartPoint[]) => string

#formatter?slot ({ value, item, index })

A row's content in place of its indicator, name and value, as shadcn's formatter: a unit, a currency, a total row. A scoped slot; the row's series key is item.key.

class?string

Classes for the tooltip's card.

ChartLegend

<div>

PropType

config?ChartConfig

The series to list: the container's config by default.

keys?readonly string[]

The series keys to list, in order: every key with a color by default.

hideIcon?boolean

Hides each series' icon (from config), leaving its color swatch.

Default: false

verticalAlign?"top" | "bottom"

Above the chart or under it.

Type: "top" | "bottom"
Default: "bottom"

class?string

Classes for the legend's row.

ChartConfig

KeyType

label?string

The series' name in the tooltip and the legend.

icon?Component

An icon beside its name in the legend and the tooltip (a lucide-vue-next icon).

color?string

Its color in both themes: a token (var(--chart-1)) or any CSS color.

theme?{ light: string; dark: string }

A color for each theme, in place of color.

Helpers

ExportType

chartTooltip?(settings?: ChartTooltipSettings) => ChartDefinitionOptions

defineChart's second argument for a chart with a tooltip: what a pointer or a key focuses (group-x, each category's series, by default), the focus ring, and the host ChartContainer draws its body in.

Type: (settings?: ChartTooltipSettings) => ChartDefinitionOptions

chartTheme?ChartTheme

defineChart's theme in the site's tokens: the text, the grid and the palette (--chart-1 to --chart-5).

chartColors?(config: ChartConfig, keys?: readonly string[]) => { domain: string[]; range: string[] }

defineChart's color: each series key (in config order, or keys') painted var(--color-<key>), for marks with a color channel.

Type: (config: ChartConfig, keys?: readonly string[]) => { domain: string[]; range: string[] }

chartLinearScale?() => LinearScale

A value axis drawn as Recharts draws its default one: zero in the domain, five nice ticks. Pass it as a factory: y: { scale: chartLinearScale }.

Type: () => LinearScale

curveNatural?CurveFactory

D3's natural curve, for a smooth line or area: curve: d3Curve(curveNatural).

curveStep?CurveFactory

D3's step curve, for a line or area that holds each value: curve: d3Curve(curveStep).

curveMonotoneX?CurveFactory

D3's monotone curve, smooth without overshooting a point: curve: d3Curve(curveMonotoneX).

curveLinearClosed?CurveFactory

D3's closed linear curve: a radar's polygon (curve: curveLinearClosed on radialLine and radialArea).

useChart?() => { config: ChartConfig }

The config of the ChartContainer around a component of your own (a custom tooltip body or legend).

Type: () => { config: ChartConfig }

Line Chart
Line charts
One series as a smooth line over six months.
Step Line Chart
Line charts
A stepped line for values that hold until they change.
Linear Area Chart
Area charts
Straight segments between points, no curve smoothing.
Line Chart with Dots
Line charts
A line with a dot on every data point.
Bar Chart
Bar charts
One series of rounded vertical bars, a month each.
Multiple Line Chart
Line charts
Two series as lines on the same axes.

All 70 charts

Preview

About

Installation

Usage

Customize

FAQ

When should I use straight segments instead of a curve?

How do I get sharp corners?

How do I mark each reading?

What happens with a missing month?

Can I mix a straight line and a curve on one chart?

Can people reach each month without a mouse?

API Reference

ChartContainer

ChartTooltipContent

ChartLegend

ChartConfig

Helpers

Related

Line Chart

Step Line Chart

Linear Area Chart

Line Chart with Dots

Bar Chart

Multiple Line Chart