# Ribbons · Pro

Silk ribbons chase the pointer on a canvas, each one lagging a little behind the last and drawn as a tapered band, so a fast sweep leaves a flowing trail that runs out when the pointer leaves.

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/ribbons
```

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

## API — Ribbons
| Prop | Type | Default | Notes |
| --- | --- | --- | --- |
| `children` | `ReactNode` | — |  |
| `count` | `number` | `3` |  |
| `width` | `number` | `14` | Head width in px; tapers to the tail. |
| `colors` | `string[]` | `["var(--ember)", "var(--foreground)", "var(--muted-foreground)"]` |  |
| `length` | `number` | `40` | Points kept per ribbon. |
| `lag` | `number` | `0.35` | Fraction of the gap the lead ribbon closes per frame. |
| `className` | `string` | — |  |

See it live: https://charcoalui.com/docs/components/ribbons