# Sign In Template

USA Sign-In Template

Authentication page template following USWDS patterns.
Composes the email-address pattern with password field.

**Template Structure (from USWDS):**
- Skip navigation + Banner + Header
- Sign-in form in centered card
- Create account link
- Footer + Identifier

## USWDS Reference

[USWDS Sign In Template](https://designsystem.digital.gov/components/sign-in-template/)

## Installation

```bash
npm install @uswds-wc/core
```

## Usage

```html
<usa-sign-in-template></usa-sign-in-template>
```

### TypeScript

```typescript
import '@uswds-wc/core/styles.css';
import 'packages/uswds-wc-templates/src/templates/sign-in/usa-sign-in-template.js';

// The component is now available as <usa-sign-in-template>
```

## Properties

| Property | Attribute | Type | Default | Description |
|----------|-----------|------|---------|-------------|
| `lang` | `lang` | `string` | `'en'` | Page language attribute |
| `showBanner` | `show-banner` | `boolean` | `true` | Whether to show the government banner |
| `showIdentifier` | `show-identifier` | `boolean` | `true` | Whether to show the identifier at the bottom |
| `heading` | `heading` | `string` | `'Sign in'` | Page heading |
| `formLegend` | `form-legend` | `string` | `'Access your account'` | Form legend (accessibility) |
| `emailLabel` | `email-label` | `string` | `'Email address'` | Email field label |
| `passwordLabel` | `password-label` | `string` | `'Password'` | Password field label |
| `submitText` | `submit-text` | `string` | `'Sign in'` | Submit button text |
| `showRememberMe` | `show-remember-me` | `boolean` | `false` | Whether to show "Remember me" checkbox |
| `showCreateAccount` | `show-create-account` | `boolean` | `true` | Whether to show the create account link |
| `createAccountUrl` | `create-account-url` | `string` | `'/create-account'` | Create account URL |
| `createAccountText` | `create-account-text` | `string` | `'Create your account now'` | Create account link text |
| `createAccountLabel` | `create-account-label` | `string` | `"Don't have an account?"` | Create account label text |
| `showForgotPassword` | `show-forgot-password` | `boolean` | `true` | Whether to show forgot password link |
| `forgotPasswordUrl` | `forgot-password-url` | `string` | `'/forgot-password'` | Forgot password URL |
| `forgotPasswordText` | `forgot-password-text` | `string` | `'Forgot password?'` | Forgot password link text |
| `showPasswordToggle` | `show-password-toggle` | `boolean` | `true` | Whether to show password toggle |
| `actionUrl` | `action-url` | `string` | `''` | Form action URL |
| `method` | `method` | `string` | `'POST'` | Form method |
| `formData` | `formData` | `SignInData` | `{ email: '', password: '', rememberMe: false, }` | Current form data state |


## Slots

| Slot | Description |
|------|-------------|
| `form-header` | Custom content above the form |
| `form-footer` | Custom content below the form (links, etc.) |
| `additional-options` | SSO or alternative login options |
| `header` | Site header |
| `footer` | Site footer |


## Events

| Event | Detail Type | Description |
|-------|-------------|-------------|
| `template-ready` | `CustomEvent` | Fired when template initializes |
| `sign-in-submit` | `CustomEvent` | Fired when form is submitted |


## CSS Custom Properties

Uses USWDS CSS classes. No custom CSS properties defined.

## Accessibility

This component follows USWDS accessibility guidelines:

- Uses semantic HTML elements
- Supports keyboard navigation
- Includes appropriate ARIA attributes
- Meets WCAG 2.1 Level AA requirements

## Examples

See the [Storybook documentation](/?path=/docs/components-sign-in-template--docs) for interactive examples.