# Multi-line

> A few series on one time axis. Sample data: P95 time to first token in four regions, last 24 hours.

- Type 012 · Change over time
- Component: `<MultiLine>`, the same name as the Figma component
- Install: `npx shadcn add @chartory/multi-line` (free in Hearth: the public registry, no token; Signal with Code and Complete)
- Type page: https://usechartory.com/charts/multi-line

## Installation

1. **Set up the registry once.** This chart is free in Hearth and MIT licensed: no token. Add @chartory to components.json once (the URL alone, no headers), or skip this when another chart is already installed. [Installation guide](https://usechartory.com/docs/installation)

2. **Add the chart.** One command adds the Multi-line component to your project.

```bash
npx shadcn add @chartory/multi-line
```

3. **Use it.** Pass your rows. The props are the Figma properties.

usage.tsx:

```tsx
import { MultiLine }
  from "@/components/chartory/multi-line"

<MultiLine
  data={ttftByRegion}
  size="m"
  legend
/>
```

## Props

### `<MultiLine>`

Every prop but data is a Figma property with the same name and values.

| Prop | Type | Default | Note |
| --- | --- | --- | --- |
| data | MultiLineData | Required | The chart's data. The tables below list every field. |
| size | "xs" \| "s" \| "m" \| "l" | "m" | The size class. Each one is laid out again from the data. |
| legend | boolean | true | Shows the legend row under the plot. |

### MultiLineData

The data prop: one object for the whole chart.

| Prop | Type | Default | Note |
| --- | --- | --- | --- |
| min | number | Required | The bottom of the value scale. |
| max | number | Required | The top of the value scale. |
| ticks | string[] | Required | The axis tick labels. |
| xl | Record<number, string> | Required | The x axis labels, by index. |
| series | MultiLineSeries[] | Required | One entry per series. |
| area? | number | — | Area opacity under each line (none when absent). |
| sw? | number | 2 | The line width. |

### MultiLineSeries

One object per entry in series.

| Prop | Type | Default | Note |
| --- | --- | --- | --- |
| name | string | Required | The name shown on the chart. |
| tok | string | Required | The colour token, e.g. "data/primary". |
| vals | number[] | Required | The values, in order. |

## Multi-line chart: a React and Figma chart in four sizes

### What does a multi-line chart show?

A multi-line chart puts several series on one shared time axis, so you can see which one leads, which one lags and when they cross. Each line keeps its own colour, named in the legend. Use it for regions, models or products measured the same way.

Chartory ships it as a Figma component and a React component with the same name. The code installs from the shadcn registry with one command and lands in your project as a file you own.

### What is the Multi-line component?

It is one **<MultiLine>** component. Its props are the Figma properties with the same names and values, and the props table above lists them. The data is two to six series, one value per point.

Sizes **XS**, **S**, **M** and **L** re-lay the chart out from the data instead of scaling it, so labels stay readable at every size.

### When should I use it?

- **Are there six series or fewer?** Yes means the multi-line fits.
- **Do the series share one unit?** Yes means the multi-line fits.
- **Do the values matter, not only the rank?** Yes means the multi-line fits.

### When does another type fit better?

- **Too many lines to follow.** Use Horizon instead.
- **Two units need two axes.** Use Bar and line combo instead.
- **Only the order matters.** Use Bump chart instead.

## Multi-line questions

### Does the Multi-line chart work with shadcn/ui?

Yes. It installs through the shadcn registry with the shadcn CLI, and the file lands in your project.

### How do I install it?

It is free in Hearth and MIT licensed: add the @chartory registry URL once, no token, then run npx shadcn add @chartory/multi-line. The Installation guide has the steps.

### Can my coding agent install it?

Yes. Connect the Chartory MCP server and ask for the multi-line chart; the agent runs the same command and you review the diff.

### What data does it expect?

Two to six series, one value per point. The sample data comes with the component, and the props table lists every field.

### Which sizes does it ship in?

XS, S, M and L, in Figma and in code. Each size is laid out again from the data, so text and lines keep their size.

### Is it in the Figma file too?

Yes. chart/012-multi-line has the same properties as the component.

### Does it follow light and dark mode?

Yes. Every paint is a token, so the chart follows light and dark mode and the collection you pick.

### Which plan has the code?

None for Hearth: it is free in the public registry, no token. The Signal collection (@chartory/signal) comes with Code and Complete.