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Charts

Free

Bar Chart with Active Bar

Q: How do I change which bar is active?

The fill, stroke and strokeDasharray accessors compare the row's index to ACTIVE_INDEX, 2 for Firefox. Change it, compare datum.browser to a name, or keep the choice in state, and the highlight moves.

Q: How is the dashed outline drawn?

With the bar's own stroke in the browser's color, strokeWidth: 2 and strokeDasharray: "4": four pixels drawn, four skipped. Drop the dash array for a solid outline.

Q: Can the active bar follow the pointer?

Yes. Give barY a states entry with when: { focus: "primary" } and the same style (stroke, strokeDasharray, fillOpacity). The focused bar takes it, from the pointer or the arrow keys.

Q: How do I let people pick the active bar?

Pass onSelect to ChartContainer. It fires on a click and on Enter or Space with the focused point. Keep the chosen browser in state and compare it in the accessors.

Five browser bars where one, Firefox, is drawn as active with a dashed outline and a lighter fill. Points at one category in Svelte with TanStack Charts.

PreviewCode

About

Use it to point at one category in a set: the plan you're selling, this month's leader, the item the page is about. The highlight comes from the data, not the hover, so it holds in a screenshot. For colors without a single focus, the mixed bar chart fits.

Five rounded bars stand in their browsers' colors. The third, Firefox, keeps its color at 80% and gets a 2px dashed outline in the same color. The tooltip shows the visitor count without a title.

Installation

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

Google GitHub

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Usage

<script lang="ts">
import ChartBarActive from "@/components/charts/chart-bar-active.svelte";
</script>

<ChartBarActive />

Customize

The highlight lives in the mark's options: fill, stroke and strokeDasharray are functions that check the row's index against ACTIVE_INDEX and return the active style for Firefox, the plain one for the rest.
The outline is strokeDasharray: "4" at strokeWidth: 2; the active fill mixes the browser's color at 80% with color-mix().
Each browser has a chartConfig entry with a --chart-N color, and visitors adds the value's label.
radius: 8 rounds every bar, the outlined one included. The x axis prints each browser's name, not its key.
To move the highlight with focus instead, put the same style in states with when: { focus: "primary" }.

FAQ

How do I change which bar is active?

The fill, stroke and strokeDasharray accessors compare the row's index to ACTIVE_INDEX, 2 for Firefox. Change it, compare datum.browser to a name, or keep the choice in state, and the highlight moves.

How is the dashed outline drawn?

With the bar's own stroke in the browser's color, strokeWidth: 2 and strokeDasharray: "4": four pixels drawn, four skipped. Drop the dash array for a solid outline.

Can the active bar follow the pointer?

Yes. Give barY a states entry with when: { focus: "primary" } and the same style (stroke, strokeDasharray, fillOpacity). The focused bar takes it, from the pointer or the arrow keys.

How do I let people pick the active bar?

Pass onSelect to ChartContainer. It fires on a click and on Enter or Space with the focused point. Keep the chosen browser in state and compare it in the accessors.

Is the highlight accessible?

Color isn't the only cue: the active bar also gets a dashed outline, which reads in grayscale. If the highlight means something, say what in the card's description or footer, since the chart can't.

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 }

Mixed Bar Chart
Bar charts
Horizontal bars, each category in a color of its own.
Bar Chart
Bar charts
One series of rounded vertical bars, a month each.
Donut Chart with Active Sector
Pie charts
A donut with one slice pulled out as active.
Bar Chart with Labels
Bar charts
Each bar's value printed above it.
Interactive Bar Chart
Bar charts
Three months of daily bars, switched between two series.
Multiple Bar Chart
Bar charts
Two series grouped side by side for each month.

All 70 charts

Preview

About

Installation

Usage

Customize

FAQ

How do I change which bar is active?

How is the dashed outline drawn?

Can the active bar follow the pointer?

How do I let people pick the active bar?

Is the highlight accessible?

API Reference

ChartContainer

ChartTooltipContent

ChartLegend

ChartConfig

Helpers

Related

Mixed Bar Chart

Bar Chart

Donut Chart with Active Sector

Bar Chart with Labels

Interactive Bar Chart

Multiple Bar Chart