# Stacked Chart · Pro

Composition over time as stacked bars or areas, in totals or as shares of 100%, with a legend that toggles series and a tooltip for each period.

This is a Charcoal UI Pro component. Its source and examples are available with a Pro seat: https://charcoalui.com/pricing

## With a Pro seat

1. Add the registry to components.json:

```json
{
  "registries": {
    "@charcoal": {
      "url": "https://charcoalui.com/r/{name}.json",
      "headers": {
        "Authorization": "Bearer ${CHARCOAL_LICENSE_KEY}"
      }
    }
  }
}
```

2. Copy your licence key from https://charcoalui.com/dashboard and put it in .env.local as CHARCOAL_LICENSE_KEY, then:

```bash
npx shadcn@latest add @charcoal/stacked-chart
```

To read Pro source through this MCP server, reconnect it with the header "Authorization: Bearer <licence key>".

## API — Stacked Chart
| Prop | Type | Default | Notes |
| --- | --- | --- | --- |
| `series` | `{ name: string; values: number[]; color?: string }[]` | — |  |
| `labels` | `string[]` | — |  |
| `variant` | `"bar" \| "area"` | `"bar"` |  |
| `percent` | `boolean` | `false` |  |
| `format` | `(v: number) => string` | — |  |

See it live: https://charcoalui.com/docs/components/stacked-chart