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Charts

Free

Interactive Line Chart

Q: How does the series switch work?

Each header button sets the active key, desktop or mobile, held in React useState, a Vue ref, Svelte $state or a Solid signal. The definition is derived from that key, so the line's y and its var(--color- ) stroke change together, and the line tweens to the new values.

Q: How do I add a third series?

Add the field to every row, an entry in chartConfig with a label and a --chart-N color, the key to the list the header buttons are built from, and its sum to the total object beside the definition.

Q: How do I add a date range?

Keep the range in state next to the series, filter chartData by date before the definition reads it, and add a select, as the Interactive Area Chart does with its 7, 30 and 90 day options.

Q: Why don't all the dates show on the axis?

Ninety-one labels would overlap. The x axis's tickLabels: { thin: { minGap: 32 } } drops any label closer than 32px to the one before, as Recharts' minTickGap does, and its tick format prints the rest as Apr 10. The tooltip shows the full date for any day you hover or reach with the arrow keys.

Q: Why does the tooltip say Page Views, not Desktop?

ChartContainer's tooltip passes nameKey: "views", and chartConfig.views holds the label Page Views with no color. The header already says which series is on, so the tooltip names what's counted. Its labelFormatter prints the full date above it.

Ninety days of daily visitors as one line, with header buttons that switch between desktop and mobile and show each total, in Svelte with TanStack Charts.

PreviewCode

About

Use it when there are two series but only one should be on screen, and the totals matter as much as the shape. The header doubles as a summary: each button shows its series' total for the period. For both series at once, use the Multiple Line Chart; for a filled look with a range select, the Interactive Area Chart.

A monotone line runs through 91 days, April to June 2024, without dots. The x axis prints a date every week or two, and the tooltip shows the full date and the value, labeled Page Views. The chart is 250px tall and fills the card's width.

Installation

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

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Usage

<script lang="ts">
import ChartLineInteractive from "@/components/charts/chart-line-interactive.svelte";
</script>

<ChartLineInteractive />

Customize

The rows are daily, { date, desktop, mobile }. One lineY reads x: "date" and y from the active series, and strokes with that series' var(--color-<key>).
The active series is state (React useState, a Vue ref, Svelte $state or a Solid signal) and the definition is derived from it, so a click rebuilds the line and the chart tweens to it.
The totals are summed once from chartData for the buttons; they don't depend on the active series.
Ninety-one dates don't fit as labels. The x axis thins them with tickLabels: { thin: { minGap: 32 } } and prints the rest as Apr 10 through its tick format. A crosshair({ y: false }) first in marks draws the hover line.
ChartContainer gets aspect-auto h-[250px] w-full on its class; its tooltip passes a labelFormatter for the full date and nameKey: "views" for the Page Views label.

FAQ

How does the series switch work?

Each header button sets the active key, desktop or mobile, held in React useState, a Vue ref, Svelte $state or a Solid signal. The definition is derived from that key, so the line's y and its var(--color-<key>) stroke change together, and the line tweens to the new values.

How do I add a third series?

Add the field to every row, an entry in chartConfig with a label and a --chart-N color, the key to the list the header buttons are built from, and its sum to the total object beside the definition.

How do I add a date range?

Keep the range in state next to the series, filter chartData by date before the definition reads it, and add a select, as the Interactive Area Chart does with its 7, 30 and 90 day options.

Why don't all the dates show on the axis?

Ninety-one labels would overlap. The x axis's tickLabels: { thin: { minGap: 32 } } drops any label closer than 32px to the one before, as Recharts' minTickGap does, and its tick format prints the rest as Apr 10. The tooltip shows the full date for any day you hover or reach with the arrow keys.

Why does the tooltip say Page Views, not Desktop?

ChartContainer's tooltip passes nameKey: "views", and chartConfig.views holds the label Page Views with no color. The header already says which series is on, so the tooltip names what's counted. Its labelFormatter prints the full date above it.

Are the header buttons accessible?

They're native buttons, so Tab reaches them and Enter or Space switches the series; each one reads as its label and total. The chart after them takes focus too: the arrow keys walk through the days, and Home and End jump to the first and last.

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.

children?Snippet

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

renderTooltip?Snippet<[ChartTooltipBodySnippetContext]>

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

Type: Snippet<[ChartTooltipBodySnippetContext]>

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.

onFocusChange?(point: ChartPoint | null) => void

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

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

onFocusGroupChange?(points: readonly ChartPoint[]) => void

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

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

onSelect?(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?Snippet<[{ index, item, name, value }]>

A row's content in place of its indicator, name and value, as shadcn's formatter: a unit, a currency, a total row. A snippet.

Type: Snippet<[{ index, item, name, value }]>

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-svelte 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 }

Multiple Line Chart
Line charts
Two series as lines on the same axes.
Interactive Area Chart
Area charts
Three months of daily visitors with a time range select.
Interactive Bar Chart
Bar charts
Three months of daily bars, switched between two series.
Chart Tooltip with Label Formatter
Tooltips
A tooltip whose label is formatted as a full date.
Line Chart
Line charts
One series as a smooth line over six months.
Linear Line Chart
Line charts
Straight segments between points, no smoothing.

All 70 charts

Preview

About

Installation

Usage

Customize

FAQ

How does the series switch work?

How do I add a third series?

How do I add a date range?

Why don't all the dates show on the axis?

Why does the tooltip say Page Views, not Desktop?

Are the header buttons accessible?

API Reference

ChartContainer

ChartTooltipContent

ChartLegend

ChartConfig

Helpers

Related

Multiple Line Chart

Interactive Area Chart

Interactive Bar Chart

Chart Tooltip with Label Formatter

Line Chart

Linear Line Chart