Skip to content
shadcn.io

shadcn.io is not affiliated with official shadcn/ui

Charts

Free

Line Chart with Labels

A line with each month's value printed above its point, so the numbers read without hovering, even in a screenshot. For Solid on TanStack Charts.

Framework
Charting library

Preview

Preview width

About

Use it when people need the numbers, not only the shape: a report, a slide, a screenshot in a ticket. Labels suit a handful of points; past ten or so they collide. To name categories instead of printing values, see the Line Chart with Custom Labels.

A natural curve through six months with a dot on each point and its value in small text above it. The top margin is larger so the highest label isn't cut off, and the tooltip shows the month and value with a line indicator.

Installation

Sign in to get your install command
Free with an account. It carries your token, so the CLI installs everything in one go.
GoogleGitHub
Use email insteadNo credit card

Usage

import { ChartLineLabel } from "@/components/charts/chart-line-label";
<ChartLineLabel />

Customize

  • A decorative text mark over the same rows prints the labels: x: "month", y: "desktop", text: "desktop" for the value and dy: -15 to lift it above the point. A decorative dot mark marks each point.
  • fill: "var(--foreground)" and fontSize: 12 keep the labels in the text color, not the series color, so they read in both themes.
  • text also takes a function of the row, so formatting is plain code: toLocaleString() for separators, a prefix for currency.
  • dy moves the text but doesn't make room for it. Labels over the highest point need a larger top margin in the definition.
  • ChartContainer's tooltip passes { indicator: "line" } and keeps the label, so the tooltip shows the month.

FAQ

How do I format the labels?

The text mark's text names the field, "desktop". Pass a function of the row instead: return row.desktop.toLocaleString() for separators, or add a currency sign or a unit there. The tooltip doesn't read it; its rows take a formatter in ChartContainer's tooltip options.

How do I move the labels closer to the points?

Change dy on the text mark: -15 lifts each label's middle 15px above its point, near where Recharts' offset={12} puts it. A smaller number brings it closer; a larger one needs more top margin (20 here), or the highest label clips.

What if the labels overlap?

The text mark doesn't push labels apart. Use fewer points or a smaller fontSize, or make text a function that returns null for the rows you want unlabeled, such as every other month.

Can I label only the highest and lowest months?

Yes. Make text a function that returns the value only for the rows you want, for example when row.desktop equals the highest or lowest value in chartData, and null for the rest.

Will the labels show up in a screenshot or export?

Yes. They're SVG text drawn in the chart, unlike the tooltip, so a screenshot or a saved SVG keeps them. That's the main reason to label a line.

Can the labels use the series color?

Set the text mark's fill to var(--color-desktop). Check the contrast in both themes: chart colors are tuned for strokes, and 12px text needs more contrast than a line.

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?JSX.Element

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

tooltip?ChartTooltipContentProps | false

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

Type
ChartTooltipContentProps | false
renderTooltip?(context: ChartTooltipBodyRenderContext) => JSX.Element

A whole tooltip body of your own, in place of ChartTooltipContent: it gets the focused points (each with its datum, group and color). Read the context's fields in JSX (context.points), so Solid tracks them.

Type
(context: ChartTooltipBodyRenderContext) => JSX.Element
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?(value: number | string, name: string, item: ChartTooltipItem, index: number) => JSX.Element

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

Type
(value: number | string, name: string, item: ChartTooltipItem, index: number) => JSX.Element
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-solid 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 }
All 70 charts