Area Chart

const data = /* ... */;

<AreaChart
  data={data}
  x="month"
  y={['desktop', 'mobile']}
  labels={{ desktop: 'Desktop', mobile: 'Mobile' }}
  fill="gradient"
  ariaLabel="Desktop and mobile visitors, January through June"
/>

An area chart is a line chart whose fill carries meaning: distance from a baseline, or the span between two boundaries. Reach for it when the reader should compare magnitude or composition — not just because a filled chart looks stronger. When only the trend matters, use the line chart.

AreaChart takes your rows and the names of the fields to read. Colors, typography, grid, tooltip, and legend all come from your design system.

Installation

npx shadcn@latest add @dotui/chart-area

It brings the chart core — the host, the palette, and the shared frame — along with it.

Usage

import { AreaChart } from '@/ui/chart-area'

Point x at the category or time field and y at the value field. A chart is a figure, so ariaLabel is required.

const data = [
  { month: 'Jan', desktop: 186 },
  { month: 'Feb', desktop: 305 },
  { month: 'Mar', desktop: 237 },
]

export function Example() {
  return (
    <AreaChart
      data={data}
      x="month"
      y="desktop"
      labels={{ desktop: 'Desktop' }}
      legend={false}
      ariaLabel="Desktop visitors by month"
    />
  )
}

data is compared by identity, so define it outside your component — or memoize it. Every other prop is a flat scalar and can change freely.

Data shape

Two shapes work, and both draw the same chart.

Wide rows carry one column per series. Pass the columns as an array, and name them with labels:

<AreaChart
  data={data}
  x="month"
  y={['desktop', 'mobile']}
  labels={{ desktop: 'Desktop', mobile: 'Mobile' }}
  ariaLabel="Visitors by device"
/>

Long rows carry one row per series per x value, with the series key in its own field. Pass that field as series, and set seriesOrder to fix color slots and legend order:

<AreaChart
  data={data}
  x="month"
  y="visitors"
  series="channel"
  seriesOrder={['paid_social', 'organic_search']}
  labels={{ organic_search: 'Organic search', paid_social: 'Paid social' }}
  ariaLabel="Visitors by acquisition channel"
/>

Series take colors from --chart-1 through --chart-8 in order. A null value leaves a gap rather than dropping to zero.

Stacking

Stacking is a data transform, not a chart flag: stackY turns wide rows into one long row per band, carrying the base and top of the band it should fill plus its own value for the tooltip. Call it outside your component, then read those fields.

import { stackY } from '@/ui/chart'

const stacked = stackY(data, { x: 'month', y: ['desktop', 'mobile', 'other'] })

<AreaChart
  data={stacked}
  x="x"
  y="top"
  y1="base"
  series="series"
  labels={{ desktop: 'Desktop', mobile: 'Mobile', other: 'Other' }}
  ariaLabel="Visitors by device, stacked"
/>

Add normalize: true for a 100% stack — each band is divided by its own x-group total — and format the value axis as a percentage with formatY.

Shape

curve sets the interpolation: natural (the default), monotone, linear, or step. fill takes an opacity, or 'gradient' for a fade toward the baseline. strokeWidth and points control the upper edge.

Interpolation only changes the path drawn between observations. It does not smooth the data or create evidence between samples.

Annotations

marks and marksBefore accept raw TanStack Charts mark layers, painted over and under the areas on the same scales. Use them for a target rule, a highlighted band, or end labels.

import { ruleY } from '@tanstack/charts/rule'

const target = ruleY([200], { strokeDasharray: '4 4' })

<AreaChart
  data={data}
  x="month"
  y="desktop"
  marks={[target]}
  ariaLabel="Desktop visitors against target"
/>

Accessibility

• ariaLabel is required and names the figure; add ariaDescription when the takeaway needs a sentence.
• The chart surface is in the tab order. Arrow keys move between points, Home and End jump to the first and last, Enter and Space pin the tooltip, and Escape dismisses it.
• Color alone never carries the distinction — the legend, tooltip, and axis labels all name the series.

Examples

API Reference

AreaChart

Interaction and animation props are shared by every chart family:

The host props — height, width, className, and the focus callbacks — are documented on the Chart page.