:::{php:namespace} Atk4\Ui
:::

# Header

:::{php:class} Header
:::

Can be used for page or section headers.

Based around: https://fomantic-ui.com/elements/header.html.

Demo: https://ui.atk4.org/demos/basic/header.php

## Basic Usage

By default header size will depend on where you add it:

```
Header::addTo($this, ['Hello, Header']);
```

## Attributes

:::{php:attr} size
:::

:::{php:attr} subHeader
:::

Specify size and sub-header content:

```
Header::addTo($seg, [
    'H1 header',
    'size' => 1,
    'subHeader' => 'H1 subheader',
]);

// or

Header::addTo($seg, [
    'Small header',
    'size' => 'small',
    'subHeader' => 'small subheader',
]);
```

## Icon and Image

:::{php:attr} icon
:::

:::{php:attr} image
:::

Header may specify icon or image:

```
Header::addTo($seg, [
    'Header with icon',
    'icon' => 'settings',
    'subHeader' => 'and with sub-header',
]);
```

Here you can also specify seed for the image:

```
$img = $app->cdn['atk'] . '/logo.png';
Header::addTo($seg, [
    'Center-aligned header',
    'aligned' => 'center',
    'image' => [$img, 'class.disabled' => true],
    'subHeader' => 'header with image',
]);
```