Charts

Composed Chart

Area, bar, and line on one axis. Default and Motion variants.

Examples

Default

Cronus mix of area, bar, and line on one time axis.

tsx

<ComposedChart data={TIMESERIES} series={[
  { key: "costs", label: "Run rate", type: "area" },
  { key: "units", label: "Units", type: "bar" },
  { key: "revenue", label: "Revenue", type: "line" },
]} />

Motion

Daily units as bars, run-rate as area, revenue as a smooth line — clip-reveal and a date pill.

tsx

import { ComposedChart, SeriesBar, Area, Line, Grid, XAxis, ChartTooltip } from "@cronus-ui/ui/charts";
import { curveCatmullRom } from "@visx/curve";

const smooth = curveCatmullRom.alpha(0.42);

<ComposedChart data={data} aspectRatio="2 / 1" barGap={0} maxBarSize={32}>
  <Grid horizontal />
  <Area curve={smooth} dataKey="runRate" fill="var(--chart-4)" fillOpacity={0.32} />
  <SeriesBar dataKey="units" fill="var(--chart-3)" radius={4} />
  <Line curve={smooth} dataKey="revenue" stroke="var(--chart-1)" strokeWidth={2.5} />
  <ChartTooltip />
  <XAxis numTicks={8} />
</ComposedChart>

Installation

Default is a ready-made wrapper from the registry. Motion is the composable engine at @cronus-ui/ui/charts (peer visx + motion).

bash

npx cronus-ui add composed-chart

tsx

import { ComposedChart } from "@cronus-ui/ui";

Usage

tsx

import { ComposedChart, Area, SeriesBar, Line, Grid, XAxis, ChartTooltip } from "@cronus-ui/ui/charts";
import { curveCatmullRom } from "@visx/curve";

<ComposedChart data={data}>
  <Grid horizontal />
  <Area dataKey="runRate" fill="var(--chart-2)" fillOpacity={0.25} />
  <SeriesBar dataKey="units" fill="var(--chart-3)" radius={4} />
  <Line dataKey="revenue" stroke="var(--chart-1)" strokeWidth={2.5} curve={curveCatmullRom} />
  <XAxis />
  <ChartTooltip />
</ComposedChart>

Components

Motion API — compose these under the chart root. Default wrapper props are in Default API below.

ComposedChart

Root that sizes the SVG, provides scales, and hosts series children.

Prop	Type	Default	Description
`data`*	`Record<string, unknown>[]`	—	Rows with a date (or x) field and numeric series.
`xDataKey`	`string`	`"date"`	Key for the x-axis.
`margin`	`Partial<{ top, right, bottom, left }>`	`{ top: 40, right: 40, bottom: 40, left: 40 }`	Plot margins.
`animationDuration`	`number`	`1100`	Clip-reveal duration in ms.
`aspectRatio`	`string`	`"2 / 1"`	CSS aspect ratio.
`status`	`"loading" \| "ready"`	`"ready"`	Loading ↔ ready choreography.
`xDomain`	`[Date, Date]`	—	Visible x-range for brush zoom.
`className`	`string`	—	Container class.
`barSize`	`number`	—	Target bar width in px.
`maxBarSize`	`number`	—	Maximum bar width in px.
`barGap`	`number`	`4`	Gap between grouped SeriesBar series.
`stacked`	`boolean`	`false`	Stack SeriesBar segments (line/area are not stacked).

Area

Filled series with an optional stroke, edge fade, markers, and a dashed tail.

Prop	Type	Default	Description
`dataKey`*	`string`	—	Y-value key.
`yAxisId`	`string \| number`	`"left"`	Scale group for dual axes.
`fill`	`string`	`var(--chart-line-primary)`	Gradient start color.
`fillOpacity`	`number`	`0.4`	Opacity at the top of the fill.
`stroke`	`string`	`same as fill`	Line color.
`strokeWidth`	`number`	`2`	Line width.
`curve`	`CurveFactory`	`curveMonotoneX`	d3 curve.
`fadeEdges`	`boolean \| "left" \| "right"`	`false`	Fade fill/stroke at chart edges.
`showMarkers`	`boolean`	`false`	Ring markers at each point.
`dashFromIndex`	`number`	—	Index from which the stroke becomes dashed.

SeriesBar

Time-aligned columns inside ComposedChart (not the categorical Bar).

Prop	Type	Default	Description
`dataKey`*	`string`	—	Value key.
`fill`	`string`	`var(--chart-line-primary)`	Fill color.
`radius`	`number`	`0`	Top corner radius.
`fadedOpacity`	`number`	`0.3`	Opacity when another x is hovered.

Line

Stroked series with optional edge fade, markers, loading pulse, and a dashed tail.

Prop	Type	Default	Description
`dataKey`*	`string`	—	Y-value key.
`yAxisId`	`string \| number`	`"left"`	Scale group for dual axes.
`stroke`	`string`	`var(--chart-line-primary)`	Line color.
`strokeWidth`	`number`	`2.5`	Line width.
`curve`	`CurveFactory`	`curveNatural`	d3 curve.
`fadeEdges`	`boolean \| "left" \| "right"`	`false`	Fade the stroke at chart edges.
`dashFromIndex`	`number`	—	Index from which the stroke becomes dashed.
`showMarkers`	`boolean`	`false`	Point markers.

Grid

Plot-area grid lines. Horizontal by default; optional shimmer while loading.

Prop	Type	Default	Description
`horizontal`	`boolean`	`true`	Show horizontal lines.
`vertical`	`boolean`	`false`	Show vertical lines.
`numTicksRows`	`number`	`5`	Horizontal line count.
`numTicksColumns`	`number`	`10`	Vertical line count.
`stroke`	`string`	`var(--chart-grid)`	Line color while ready.
`strokeDasharray`	`string`	`"4,4"`	Dash pattern.
`shimmer`	`boolean`	`false`	Animate a band across horizontal lines.
`highlightRowValues`	`number[]`	—	Rows drawn with alternate styling (e.g. zero).

XAxis

Time-axis labels that fade when the crosshair passes.

Prop	Type	Default	Description
`numTicks`	`number`	`5`	Tick labels to show, including first and last.
`tickerHalfWidth`	`number`	`50`	Fade radius around the date pill.
`tickMode`	`"data" \| "domain"`	`"data"`	`data` snaps labels to rows (crosshair-aligned). `domain` spaces ticks evenly.

ChartTooltip

Motion tooltip: crosshair, series dots, floating panel, optional date pill. This is not the recharts ChartTooltip from `@cronus-ui/ui`.

Prop	Type	Default	Description
`showDatePill`	`boolean`	`true`	Animated date ticker on the x-axis.
`showCrosshair`	`boolean`	`true`	Vertical crosshair.
`showDots`	`boolean`	`true`	Dots on series at the hovered x.
`dotVariant`	`"dot" \| "ring"`	`"dot"`	Filled circle or ring.
`indicatorColor`	`string \| (point) => string`	—	Crosshair and dot color.
`indicatorDasharray`	`string`	—	Dash pattern for the crosshair.
`indicatorFadeEdges`	`"both" \| "top" \| "bottom" \| "none"`	`"both"`	Vertical crosshair fade.
`matchCrosshair`	`boolean`	`false`	Panel uses the crosshair spring when true.
`damping`	`number`	`20`	Panel follow when matchCrosshair is false. 0 = instant.
`content`	`(props) => ReactNode`	—	Custom tooltip renderer.
`rows`	`(point) => TooltipRow[]`	—	Custom row generator.

Mixing series

Child order is paint order. Put Area first, SeriesBar next, Line on top. Tooltip rows follow registered series.

tsx

<ComposedChart data={data} barSize={18}>
  <Area dataKey="runRate" fillOpacity={0.25} />
  <SeriesBar dataKey="units" radius={4} />
  <Line dataKey="revenue" strokeWidth={2.5} />
  <XAxis />
  <ChartTooltip />
</ComposedChart>

Data format

const data = [
  { date: new Date("2026-01-01"), runRate: 420, units: 36, revenue: 18400 },
  { date: new Date("2026-01-02"), runRate: 438, units: 41, revenue: 19200 },
];

Theming

Motion charts read `--chart-*` aliases that map onto Cronus semantic tokens (`--cronus-chart-1`…`--cronus-chart-5`, `--cronus-border`, `--cronus-fg`, surfaces). Override the aliases or the tokens — never palette scales (`bg-zinc-900`). Default wrappers use `ChartConfig` with `var(--cronus-chart-*)` / `var(--cronus-primary)`.

Full token reference: Theming.

Dependencies

Default needs the recharts peer. Motion needs visx (and sometimes d3) as optional peers — install only what this chart uses.

bash

bun add recharts

bash

bun add @visx/curve @visx/responsive @visx/scale @visx/shape motion react-use-measure @visx/gradient

Default API

Generated from the Default wrapper's exported types. Motion subcomponents are documented above.

ComposedChartProps

Extends HTMLAttributes<HTMLDivElement>

Prop	Type	Default	Description
`data`*	`Record<string, unknown>[]`	—	—
`xKey`	`string`	`"date"`	—
`series`*	`ComposedChartSeries[]`	—	—
`formatValue`	`(value: number, name: string) => string`	—	—