# Fieldset

A group of related form fields with a common label.

## Installation

Start from a Svelte 5 application, then install the component package, shared theme, and Bits UI peer:

```bash
pnpm add coss-svelte @coss-svelte/theme bits-ui
```

Import `@coss-svelte/theme/style-coss.css` after Tailwind from the application's global stylesheet.

## Usage

```svelte
<script lang="ts">
import { Field, FieldDescription, FieldLabel, Fieldset, FieldsetLegend, Input } from "coss-svelte";
</script>

<Fieldset class="flex w-full flex-col gap-6">
	<FieldsetLegend>Billing Details</FieldsetLegend>
	<Field>
		<FieldLabel>Company</FieldLabel>
		<Input placeholder="Enter company name" type="text" />
		<FieldDescription>The name that will appear on invoices.</FieldDescription>
	</Field>
	<Field>
		<FieldLabel>Tax ID</FieldLabel>
		<Input placeholder="Enter tax identification number" type="text" />
		<FieldDescription>Your business tax identification number.</FieldDescription>
	</Field>
</Fieldset>

```

## Anatomy

- `Fieldset`
- `FieldsetLegend`

## API Reference

### Fieldset

A group of related form fields with a common label.

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `legend` | `string` | `""` | Legend text rendered by the fieldset fallback layout. |
| `description` | `string` | `""` | Supporting text rendered by the component's built-in fallback layout. |

**Composition and refs**

- `children: Snippet<[]>`

Inherits from [Svelte <fieldset> attributes](https://svelte.dev/docs/svelte/basic-markup#Attributes).

### FieldsetLegend

Names the grouped controls inside a fieldset.

**Composition and refs**

- `children: Snippet<[]>`

Inherits from [Svelte component attributes](https://svelte.dev/docs/svelte/basic-markup#Attributes).

## Implementation Details

| Field | Value |
| --- | --- |
| Status | Stable |
| Foundation | native |
| Category | Forms & Validation |
| Particles | 1 |

## Status

Stable for the current coss-svelte surface.

## Agent Notes

- Import Svelte exports directly from `coss-svelte`.
- This is Svelte 5 code: use `class`, lowercase event properties, runes, snippets, and documented `bind:*` contracts. Do not emit JSX, React hooks, `className`, `asChild`, or Base UI imports.
- Prefer this route's example and generated API table over React COSS snippets; COSS React particles are design references only.
- The copy-and-own registry is a preview. Inspect `/r/fieldset.json` for the complete local file and dependency closure.
- Fieldset is stable in the current source catalog.