PieChart

Pie and donut charts with labels, a center value, an active slice and stacked rings.

Example
import { PieChart } from "@elements/ui/chart-pie";
import type { ChartConfig } from "@elements/ui/chart";

const config: ChartConfig = {
  chrome: { label: "Chrome", color: "var(--chart-1)" },
  safari: { label: "Safari", color: "var(--chart-2)" },
};

<PieChart data={rows} {config} value="visitors" name="browser" />
<PieChart data={rows} {config} value="visitors" name="browser"
          innerRadius={60} centerValue="1,125" centerLabel="Visitors" />

Parts

Part	What it is
PieChart	The template. One slice per row, or one ring per value key.
.chart-pie-slice	One slice (an SVG path) and its own hit target; .is-active when active.
.chart-pie-ring	The ring outside the active slice with activeShape=ring.
.chart-center	The donut's center text: .chart-center-value and .chart-center-label.
.chart	The figure. Declares --color-<key> for each config entry; keeps a 16:9 box unless sized by class.
.chart-plot	The focusable plot area holding the SVG; one tab stop.
.chart-tooltip	The tooltip: heading, one row per item with swatch, name and value, optional footer.
.chart-legend	The legend row; .chart-legend-item per series, a button with legend toggle.
.chart-table	The data as a table, visually hidden unless showTable.

Attributes

Attribute	Type	Default	Description
data	Row[]	(required)	One row per slice. A row's fill field colors its slice.
config	ChartConfig	(required)	The chart config: per data key a label, a color (any CSS color, usually var(--chart-N)) or a theme { light, dark }, and an optional icon; legendType and tooltipType; strokeDasharray and strokeOpacity dash and fade a line or an area's edge. Each key becomes --color-<key> on the chart.
value	string | string[]	(required)	The value field. Several draw concentric rings from the same rows, the first innermost.
name	string	""	The name field: tooltip and legend names and colors through the config.
innerRadius	number | string	0	px, or a percent of the radius. Above 0 draws a donut.
outerRadius	number | string	"80%"	px, or a percent of the largest radius that fits.
maxRadius	number	0	The most the outer radius may be, px; 0 for no cap.
startAngle	number	0	Degrees, counter-clockwise from three o'clock.
endAngle	number	360	180 with startAngle 0 draws a half pie.
paddingAngle	number	0	Degrees left between slices.
minAngle	number	0	The least angle of a slice with a value, degrees.
cornerRadius	number	0	Rounds each slice's corners, px.
separator	number	-1	The gap drawn between slices in the surface color, px. -1 follows the theme; 0 is none.
ringGap	number	10	px between rings.
hide	boolean | string[]	false	Rings not drawn: true for all, or their value keys; the others keep their places.
layout	"centric" | "radial"	"centric"	The chart layout. A pie places its slices by its own angles and radii, so both draw the same.
labels	boolean | { position?: "outside" | "inside"; key?: string; formatter?: (value, row) => string; line?: boolean; offset?: number }	false	Values or another field outside each slice on a leader line, or inside it.
centerValue	string	""	Large text in the donut's hole.
centerLabel	string	""	Small text under the center value.
activeShape	"none" | "grow" | "ring"	"none"	Draw the active slice grown by activeOffset, or grown with a ring outside it.
inactiveShape	"none" | "dim"	"none"	dim fades every slice but the active one.
margin	{ top?, right?, bottom?, left? }	{}	Space around the plot in px.
cx, cy	number | string, number | string	"50%", "50%"	The center of the pie: px from the left and top edges, or a percentage of the plot.
activeOffset	number	10	px the active slice grows.
tooltip	boolean | { indicator?: "dot" | "line" | "dashed"; hideLabel?: boolean; hideIndicator?: boolean; color?: string; labelKey?: string; nameKey?: string; labelFormatter?: (label, row) => string; formatter?: (value, key, row) => string; footer?: (row) => string; footerLabel?: string; unit?: string; defaultIndex?: number; cursor?: boolean; filterNull?: boolean; trigger?: "hover" | "click"; active?: boolean; position?: { x?, y? }; reverseDirection?: { x?, y? }; itemSorter?: "name" | "value" | "key" | (item) => number | string; includeHidden?: boolean; animationDuration?: number; animationEasing?: string | (t) => number; isAnimationActive?: boolean }	true	The tooltip: false turns it off; an object sets the indicator, hides the heading or swatches, takes names and headings from other keys, formats them, adds a footer line, or turns off the hover cursor. More options: trigger click (a click shows it and it stays), active (always or never shown), position (a fixed spot), reverseDirection, itemSorter and includeHidden.
legend	boolean | { position?: "top" | "bottom" | "left" | "right" | "center" | "insideTop" | "insideBottom" | "insideLeft" | "insideRight" | "insideTopLeft" | "insideTopRight" | "insideBottomLeft" | "insideBottomRight" | { x, y }; offset?: number; iconSize?: number; verticalAlign?: "top" | "middle" | "bottom"; align?: "left" | "center" | "right"; layout?: "horizontal" | "vertical"; iconType?: "square" | "rect" | "circle" | "line" | "plainline" | "diamond" | "triangle" | "cross" | "star" | "wye" | "none"; formatter?: (name, key) => string; itemSorter?: "name" | "key" | (item) => number | string; hideIcon?: boolean; nameKey?: string; toggle?: boolean }	false	A legend of the slices, named through the config by the name field; toggle hides slices.
active	number (two-way)	-1	The active slice (ring index times the row count plus the row index). Hover and arrows move it; leaving restores it.
hidden	string[] (two-way)	[]	Slice names left out; the others fill the circle.
label	string	"Pie chart"	The chart's accessible name and its table's caption.
animate	boolean	true	Marks enter with motion and move to new values. Off under prefers-reduced-motion.
animation	{ begin?: number; duration?: number; easing?: string | (t) => number; matchBy?: "index" | "append" | (item, index) => key; interpolate?: (items, t) => items; newValues?: boolean }	{}	Times the entry and the move to new data. matchBy pairs old and new items by position or by a key, matchByDataKey(field) from the chart package; interpolate draws every frame of a change from the paired items and the eased time; newValues false shows an unpaired new point at once.
showTable	boolean	false	Show the chart's data table under the plot. The table is always in the accessibility tree.
class	string	""	Classes on the figure. Size the chart here: it keeps a 16:9 box unless given a height or aspect-ratio.
attrs	Record<string, string | number | boolean | undefined>	{}	Any other attributes for the figure: id, data-testid, aria-*.
syncId	string	""	Charts with the same syncId share the active item and its tooltip.
syncMethod	"index" | "value"	"index"	Match the shared item by position, or by its category or name.
onActiveChange	(index: number) => void	() => {}	The user moved the active item (hover, leave or keys).
onItemClick	(index: number) => void	() => {}	A click or tap on an item, with its index.
onHiddenChange	(hidden: string[]) => void	() => {}	A legend toggle changed hidden.

Keyboard

Keys	Action
Tab	Focuses the chart (one tab stop) and shows the tooltip for the item the keys last reached, else the active item, else the first.
ArrowRight / ArrowDown	Next item. The same under dir=rtl: the plot is not mirrored, so keys follow the screen.
ArrowLeft / ArrowUp	Previous item.
Home / End	First and last item.
Escape	Hides the tooltip. In a dialog, the dialog stays open until the next Escape.

Data attributes

Attribute	Values	On
data-chart	"bar" | "line" | "area" | "pie" | "radar" | "radial"	figure
data-state	"open" | "closed"	.chart-tooltip
data-index	the item index	.chart-hit and pie, radial marks
data-series	the series key	marks
data-resizing	present while the chart redraws for a new size	figure
data-entered	present once the entry motion is over	figure
aria-pressed	true | false	.chart-legend-item (toggle)

Accessibility

• The plot is one tab stop: role=group, aria-roledescription=chart, named by label, described by the data table.
• The SVG is aria-hidden; a screen reader gets the data from the table, which every chart renders.
• Arrow keys move through the items and each move is announced in a polite live region, for example "February: Desktop 305, Mobile 200".
• Identity is never color alone: a legend for two or more series and labels on the tooltip rows.
• Legend toggles are buttons with aria-pressed.

See also

• Chart (opens in a new tab): What every chart shares: the config and its colors, the tooltip, the legend, the palette and the data table.
• BarChart (opens in a new tab): Vertical, horizontal, stacked and grouped bars with tooltip, legend and labels.
• LineChart (opens in a new tab): Lines over categories with dots, curves, labels and a crosshair tooltip.
• AreaChart (opens in a new tab): Filled areas, stacked or expanded, solid or gradient, with a crosshair tooltip.
• RadarChart (opens in a new tab): Values on radial axes, one polygon per series, over a polygon or circle grid.
• RadialChart (opens in a new tab): Radial bars and gauges, with tracks, labels along the arc and a center value.