# Fieldset

Fieldset component for grouping form fields with optional legend and consistent styling.

## Tag

`Fieldset`

## Props

| Prop | Type | Default | Description |
| :--- | :--- | :--- | :--- |
| `legend` | `string \| VNode \| Signal` | `-` | Fieldset legend/title |
| `class` | `string` | `''` | Additional CSS classes (DaisyUI + Tailwind) |
| `children` | `VNode \| Array<VNode>` | Required | Form fields or content inside the fieldset |

## Styling

Fieldset supports all **daisyUI Fieldset classes**:

| Category | Keywords | Description |
| :--- | :--- | :--- |
| Base | `fieldset` | Base fieldset styling |
| Color | `fieldset-primary`, `fieldset-secondary`, `fieldset-accent` | Border color variants |
| Size | `fieldset-xs`, `fieldset-sm`, `fieldset-md`, `fieldset-lg` | Fieldset scale |

> For further details, check the [daisyUI Fieldset Documentation](https://daisyui.com/components/fieldset) – Full reference for CSS classes.

### Example

```javascript
Fieldset({
  legend: "Personal Information",
  class: "fieldset-primary w-full max-w-md"
}, [
  Input({ label: "Name", placeholder: "Enter your name" }),
  Input({ label: "Email", type: "email" })
]);
```

## Live Examples

### Basic Fieldset

<div class="card bg-base-200 border border-base-300 shadow-sm my-6">
  <div class="card-body">
    <h3 class="card-title text-sm uppercase opacity-50 mb-4">Live Demo</h3>
    <div id="demo-basic" class="bg-base-100 p-6 rounded-xl border border-base-300"></div>
  </div>
</div>

```javascript
const BasicDemo = () => {
  return Fieldset({
    legend: 'User Information',
    class: 'w-full max-w-md mx-auto'
  }, [
    Div({ class: 'space-y-4' }, [
      Input({ label: 'Full Name', placeholder: 'Enter your name' }),
      Input({ label: 'Email', type: 'email', placeholder: 'user@example.com' }),
      Input({ label: 'Phone', type: 'tel', placeholder: '+1 234 567 890' })
    ])
  ]);
};
$mount(BasicDemo, '#demo-basic');
```

### With Reactive Legend

<div class="card bg-base-200 border border-base-300 shadow-sm my-6">
  <div class="card-body">
    <h3 class="card-title text-sm uppercase opacity-50 mb-4">Live Demo</h3>
    <div id="demo-reactive" class="bg-base-100 p-6 rounded-xl border border-base-300"></div>
  </div>
</div>

```javascript
const ReactiveDemo = () => {
  const name = $('');
  const email = $('');
  const isValid = () => name().length > 0 && email().includes('@');
  
  return Fieldset({
    legend: () => isValid() ? '✓ Valid Form' : '✗ Incomplete Form',
    class: 'w-full max-w-md mx-auto'
  }, [
    Div({ class: 'space-y-4' }, [
      Input({ 
        label: 'Full Name', 
        value: name,
        oninput: (e) => name(e.target.value),
        placeholder: 'Enter your name'
      }),
      Input({ 
        label: 'Email', 
        type: 'email',
        value: email,
        oninput: (e) => email(e.target.value),
        placeholder: 'user@example.com'
      }),
      () => isValid() 
        ? Alert({ type: 'success', message: 'Form is ready to submit' })
        : Alert({ type: 'warning', message: 'Please fill all required fields' })
    ])
  ]);
};
$mount(ReactiveDemo, '#demo-reactive');
```

### Address Form

<div class="card bg-base-200 border border-base-300 shadow-sm my-6">
  <div class="card-body">
    <h3 class="card-title text-sm uppercase opacity-50 mb-4">Live Demo</h3>
    <div id="demo-address" class="bg-base-100 p-6 rounded-xl border border-base-300"></div>
  </div>
</div>

```javascript
const AddressDemo = () => {
  const address = $('');
  const city = $('');
  const zip = $('');
  const country = $('us');
  
  return Fieldset({
    legend: Span({ class: 'flex items-center gap-2' }, ['📍', 'Shipping Address']),
    class: 'w-full max-w-md mx-auto'
  }, [
    Div({ class: 'space-y-4' }, [
      Input({ label: 'Street Address', value: address, placeholder: '123 Main St', oninput: (e) => address(e.target.value) }),
      Div({ class: 'grid grid-cols-2 gap-4' }, [
        Input({ label: 'City', value: city, placeholder: 'City', oninput: (e) => city(e.target.value) }),
        Input({ label: 'ZIP Code', value: zip, placeholder: 'ZIP', oninput: (e) => zip(e.target.value) })
      ]),
      Select({
        label: 'Country',
        value: country,
        items: [
          { value: 'us', label: 'United States' },
          { value: 'ca', label: 'Canada' },
          { value: 'mx', label: 'Mexico' }
        ],
        onchange: (e) => country(e.target.value)
      })
    ])
  ]);
};
$mount(AddressDemo, '#demo-address');
```

### Payment Method

<div class="card bg-base-200 border border-base-300 shadow-sm my-6">
  <div class="card-body">
    <h3 class="card-title text-sm uppercase opacity-50 mb-4">Live Demo</h3>
    <div id="demo-payment" class="bg-base-100 p-6 rounded-xl border border-base-300"></div>
  </div>
</div>

```javascript
const PaymentDemo = () => {
  const method = $('credit');
  const cardNumber = $('');
  const expiry = $('');
  const cvv = $('');
  
  return Fieldset({
    legend: Span({ class: 'flex items-center gap-2' }, ['💳', 'Payment Details']),
    class: 'w-full max-w-md mx-auto'
  }, [
    Div({ class: 'space-y-4' }, [
      Div({ class: 'flex gap-4' }, [
        Radio({ label: 'Credit Card', value: method, inputValue: 'credit', onclick: () => method('credit') }),
        Radio({ label: 'PayPal', value: method, inputValue: 'paypal', onclick: () => method('paypal') }),
        Radio({ label: 'Bank Transfer', value: method, inputValue: 'bank', onclick: () => method('bank') })
      ]),
      () => method() === 'credit' ? Div({ class: 'space-y-4' }, [
        Input({ label: 'Card Number', value: cardNumber, placeholder: '1234 5678 9012 3456', oninput: (e) => cardNumber(e.target.value) }),
        Div({ class: 'grid grid-cols-2 gap-4' }, [
          Input({ label: 'Expiry Date', value: expiry, placeholder: 'MM/YY', oninput: (e) => expiry(e.target.value) }),
          Input({ label: 'CVV', type: 'password', value: cvv, placeholder: '123', oninput: (e) => cvv(e.target.value) })
        ])
      ]) : null,
      () => method() === 'paypal' ? Alert({ type: 'info', message: 'You will be redirected to PayPal after confirming.' }) : null,
      () => method() === 'bank' ? Alert({ type: 'warning', message: 'Bank transfer details will be sent via email.' }) : null
    ])
  ]);
};
$mount(PaymentDemo, '#demo-payment');
```

### Preferences Panel

<div class="card bg-base-200 border border-base-300 shadow-sm my-6">
  <div class="card-body">
    <h3 class="card-title text-sm uppercase opacity-50 mb-4">Live Demo</h3>
    <div id="demo-preferences" class="bg-base-100 p-6 rounded-xl border border-base-300"></div>
  </div>
</div>

```javascript
const PreferencesDemo = () => {
  const theme = $('light');
  const language = $('en');
  const notifications = $(true);
  
  return Fieldset({
    legend: Span({ class: 'flex items-center gap-2' }, ['⚙️', 'Preferences']),
    class: 'w-full max-w-md mx-auto'
  }, [
    Div({ class: 'space-y-4' }, [
      Div({ class: 'form-control' }, [
        Span({ class: 'label-text mb-2' }, 'Theme'),
        Div({ class: 'flex gap-4' }, [
          Radio({ label: 'Light', value: theme, inputValue: 'light', onclick: () => theme('light') }),
          Radio({ label: 'Dark', value: theme, inputValue: 'dark', onclick: () => theme('dark') }),
          Radio({ label: 'System', value: theme, inputValue: 'system', onclick: () => theme('system') })
        ])
      ]),
      Select({
        label: 'Language',
        value: language,
        items: [
          { value: 'en', label: 'English' },
          { value: 'es', label: 'Español' },
          { value: 'fr', label: 'Français' }
        ],
        onchange: (e) => language(e.target.value)
      }),
      Checkbox({
        label: 'Enable notifications',
        value: notifications,
        onclick: () => notifications(!notifications())
      })
    ])
  ]);
};
$mount(PreferencesDemo, '#demo-preferences');
```

### Registration Form

<div class="card bg-base-200 border border-base-300 shadow-sm my-6">
  <div class="card-body">
    <h3 class="card-title text-sm uppercase opacity-50 mb-4">Live Demo</h3>
    <div id="demo-registration" class="bg-base-100 p-6 rounded-xl border border-base-300"></div>
  </div>
</div>

```javascript
const RegistrationDemo = () => {
  const username = $('');
  const email = $('');
  const password = $('');
  const confirmPassword = $('');
  const accepted = $(false);
  
  const passwordsMatch = () => password() === confirmPassword();
  const isFormValid = () => username() && email().includes('@') && password().length >= 6 && passwordsMatch() && accepted();
  
  const handleSubmit = () => {
    if (isFormValid()) {
      Toast('Registration successful!', 'alert-success', 2000);
    }
  };
  
  return Fieldset({
    legend: Span({ class: 'flex items-center gap-2' }, ['📝', 'Create Account']),
    class: 'w-full max-w-md mx-auto'
  }, [
    Div({ class: 'space-y-4' }, [
      Input({ label: 'Username', value: username, placeholder: 'Choose a username', oninput: (e) => username(e.target.value) }),
      Input({ label: 'Email', type: 'email', value: email, placeholder: 'your@email.com', oninput: (e) => email(e.target.value) }),
      Input({ label: 'Password', type: 'password', value: password, placeholder: 'Min. 6 characters', oninput: (e) => password(e.target.value) }),
      Input({ 
        label: 'Confirm Password', 
        type: 'password', 
        value: confirmPassword, 
        error: () => confirmPassword() && !passwordsMatch() ? 'Passwords do not match' : '',
        oninput: (e) => confirmPassword(e.target.value)
      }),
      Checkbox({
        label: 'I accept the Terms and Conditions',
        value: accepted,
        onclick: () => accepted(!accepted())
      }),
      () => !isFormValid() && (username() || email() || password()) ? Alert({ type: 'warning', message: 'Please complete all fields correctly' }) : null,
      Button({ 
        class: 'btn btn-primary w-full', 
        onclick: handleSubmit,
        disabled: () => !isFormValid()
      }, 'Register')
    ])
  ]);
};
$mount(RegistrationDemo, '#demo-registration');
```

### All Variants

<div class="card bg-base-200 border border-base-300 shadow-sm my-6">
  <div class="card-body">
    <h3 class="card-title text-sm uppercase opacity-50 mb-4">Live Demo</h3>
    <div id="demo-variants" class="bg-base-100 p-6 rounded-xl border border-base-300 flex flex-col gap-4"></div>
  </div>
</div>

```javascript
const VariantsDemo = () => {
  const commonContent = Div({ class: 'space-y-4' }, [
    Input({ label: 'Field 1', placeholder: 'Enter value' }),
    Input({ label: 'Field 2', placeholder: 'Enter value' }),
    Button({ class: 'btn btn-primary' }, 'Submit')
  ]);
  
  return Div({ class: 'flex flex-col gap-4' }, [
    Fieldset({ legend: 'Default Fieldset', class: 'w-full' }, [commonContent]),
    Fieldset({ legend: 'With Shadow', class: 'w-full shadow-lg' }, [commonContent]),
    Fieldset({ legend: 'With Background', class: 'w-full bg-base-100' }, [commonContent])
  ]);
};
$mount(VariantsDemo, '#demo-variants');
```