---
meta:
  title: USAIdentifier
  component: usa-identifier
---

# USAIdentifier

A USWDS identifier component built with Lit Element.

## Usage

```html
<usa-identifier></usa-identifier>
```

```javascript
import 'path/to/uswds-webcomponents/src/components/identifier/index.js';
```

## Properties

| Property | Type | Default | Description |
|----------|------|---------|-------------|
| `domain` | `any` | `''` | Property description |
| `agency` | `any` | `''` | Property description |
| `description` | `any` | `''` | Property description |
| `requiredLinks` | `IdentifierLink[]` | `[
    { href: '/about', text: 'About' },
    { href: '/accessibility', text: 'Accessibility support' },
    { href: '/foia', text: 'FOIA requests' },
    { href: '/no-fear-act', text: 'No FEAR Act data' },
    { href: '/inspector-general', text: 'Office of the Inspector General' },
    { href: '/performance', text: 'Performance reports' },
    { href: '/privacy', text: 'Privacy policy' },
  ]` | Property description |
| `logos` | `IdentifierLogo[]` | `[]` | Property description |
| `parentAgency` | `any` | `''` | Property description |
| `parentAgencyHref` | `any` | `''` | Property description |
| `showLogos` | `any` | `true` | Property description |
| `showRequiredLinks` | `any` | `true` | Property description |
| `mastheadLogoSrc` | `any` | `'data:image/svg+xml` | Property description |
| `mastheadLogoAlt` | `any` | `''` | Property description |

## Events

| Event | Type | Description |
|-------|------|-------------|
| `link-click` | CustomEvent | Event description |

## Accessibility

This component implements USWDS accessibility standards:

- Proper ARIA attributes and roles
- Keyboard navigation support
- Screen reader compatibility
- High contrast mode support

## USWDS Documentation

- [Identifier - U.S. Web Design System](https://designsystem.digital.gov/components/identifier/)
- [Identifier Guidance](https://designsystem.digital.gov/components/identifier/#guidance)
- [Identifier Accessibility](https://designsystem.digital.gov/components/identifier/#accessibility)

## Implementation Notes

- Uses light DOM for maximum USWDS compatibility
- Follows official USWDS HTML structure and CSS classes
- Progressive enhancement with USWDS JavaScript behaviors when available

## Testing

Run component tests:

```bash
npm test src/components/identifier/usa-identifier.test.ts
```

## Storybook

View component examples: [USAIdentifier Stories](http://localhost:6006/?path=/story/components-identifier)

---

_This README is automatically updated when component code changes._
_Last updated: 2025-10-18_