---
meta:
  title: USAFileInput
  component: usa-file-input
---

# USAFileInput

A USWDS file-input component built with Lit Element.

## Usage

```html
<usa-file-input></usa-file-input>
```

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

## Properties

| Property | Type | Default | Description |
|----------|------|---------|-------------|
| `name` | `any` | `'file-input'` | Property description |
| `inputId` | `any` | `'file-input'` | Property description |
| `label` | `any` | `'Select file'` | Property description |
| `hint` | `any` | `''` | Property description |
| `multiple` | `any` | `false` | Property description |
| `disabled` | `any` | `false` | Property description |
| `required` | `any` | `false` | Property description |
| `accept` | `any` | `''` | Property description |
| `maxFileSize` | `any` | `''` | Property description |
| `selectedFiles` | `File[]` | `[]` | Property description |

## Events

| Event | Type | Description |
|-------|------|-------------|
| No custom events | | |

## Accessibility

This component implements USWDS accessibility standards:

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

## USWDS Documentation

- [File-input - U.S. Web Design System](https://designsystem.digital.gov/components/file-input/)
- [File-input Guidance](https://designsystem.digital.gov/components/file-input/#guidance)
- [File-input Accessibility](https://designsystem.digital.gov/components/file-input/#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/file-input/usa-file-input.test.ts
```

## Storybook

View component examples: [USAFileInput Stories](http://localhost:6006/?path=/story/components-file-input)

---

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