# Sparkline

A React component in [Beamline](https://beamline.io/)'s [Charts & data-vis](https://beamline.io/components/charts) category. Live demo: https://beamline.io/components/sparkline

A compact trend beside its value: point along it or focus it and use ← → to read each point; nulls are gaps. TrendLine is the bare line.

## Use it for

- A trend next to a number in a card, a row or a header.

## Not for

- Charts people read in detail ([line-chart](https://beamline.io/components/line-chart)).

## Anatomy

- label
- change
- value
- line with area
- scrub guide and dot

## States

- rest
- scrubbing
- gaps

## Keyboard

- Focus and ← → to read points
- Escape resets

## Motion

New data reshapes the line and its area in place over --pui-duration-considered (a series of the same length interpolates; another length places at once).

## Props

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `data` | `(number \| null)[]` | — |  |
| `label / value / change` | `string` | — |  |
| `tone` | `"accent" \| "success" \| "danger" \| "warning" \| "neutral"` | — |  |
| `labels / formatValue` | `string[] / (v, i) => string` | — |  |
| `width / height / area / interactive` | `mixed` | — |  |
| `TrendLine / smoothPath` | `exports` | — |  |
| `style / ref` | `CSSProperties / native Ref` | — |  |
| `classNames` | `SparklineClassNames` | — |  |
| `trendClassNames` | `TrendLineClassNames` | — |  |
| `TrendLine style / ref / classNames` | `CSSProperties / Ref<HTMLDivElement> / TrendLineClassNames` | — |  |

## Import

```tsx
import { TrendLine, Sparkline } from "@/components/sparkline/sparkline";
```

## Get it

Sparkline is part of Beamline: 190 React components and screens your coding agent (Claude Code, Codex, Cursor or any MCP client) installs into your app through Beamline's MCP server, as a ready-built package or as plain React source you can change. $49 one payment (regular $200), no subscription, a year of updates, one licence for your whole team. [Get Beamline](https://beamline.io/checkout?pack=complete) · [Connect your agent](https://beamline.io/connect)

## More in Charts & data-vis

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- [Area chart](https://beamline.io/components/area-chart): Amounts over time as filled areas: overlapping, stacked or as shares of 100%, five fills, two strokes, five curves, a range handle; gaps for missing…
- [Bar chart](https://beamline.io/components/bar-chart): Amounts by category as bars: columns or rows, grouped, stacked or as shares, reference lines, five looks (rounded, cells, trace, isometric, monospace), a…
- [Composed chart](https://beamline.io/components/composed-chart): Different measures on one time axis: bars, lines and areas per series, a left and a right value axis with their own formats, and reference lines.
- [Gauge](https://beamline.io/components/gauge): One value against a known range: a semicircle, a 270° dial or a full ring, filled or with a needle, coloured bands with their names (healthy, busy…
- [Line chart](https://beamline.io/components/line-chart): Values over time as lines: curves, point markers, dashed series for forecasts, reference lines for limits and targets, an optional zero baseline and a…
- [Pie chart](https://beamline.io/components/pie-chart): A few shares of a whole as a pie or donut, with spaced slices, percent labels, a centre readout and a list of every slice with value and share; hovering…
- [Radar chart](https://beamline.io/components/radar-chart): A few series compared across the same five to eight dimensions as polygons on a polygon or circle grid; hover or arrow keys pick a dimension and read…
- [Radial chart](https://beamline.io/components/radial-chart): Progress of a few measures toward their targets as concentric rings, full or half circle, with a centre readout and a list of each ring's value, target…
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