#### Limitless - Vertical Navigation

##### Navigation overview

Vertical navigation - type of navigation that is used in sidebars and has vertical direction. By default navigation includes custom icons based on 16px grid, aligned to the left (to the right in RTL layout) and have absolute position. In mini sidebar navigation text is hidden. In this type of sidebar icons are centered and have static position. Also optional styling is available: different sizes, bordered nav and layout with right aligned icons. Vertical navigation supports the following options:

Option | Description
--- | ---
Navigation placement | Main navigation can be used in any sidebar type - main, secondary, right and content. Please note - collapsed navigation is allowed only in main sidebar, all other sidebars display full sized navigation. Since navigation is a part of sidebar content, it can be mixed with other components and can be placed before or after them depending on the priority.
Navigation types | Default navigation type is collapsible: when new item is expanded, current level remains opened. This logic works in all navigation levels. Collapsible navigation doesn't require any additional classes. The second navigation type is accordion: when new item is expanded, current level is collapsed. This logic works in all navigation levels as well. In mini sidebar parent level of navigation doesn't have click event and shows child levels on hover, but child levels functionality remains according to the type of navigation. Sidebar navigation supports up to 4 levels of child menus. To use collsprible nav type, add `data-nav-type="collapsible"` data attribute to `.nav-sidebar` container. To use accordion nav type, add `data-nav-type="accordion"` attribute to `.nav-sidebar` container.
Additional styling | Vertical navigation support a few additional styling options: bordered navigation styling adds horizontal lines to nav items in top level; right icons - icons in vertical navigation can be aligned to the left or to the right. To use right aligned icons, add `.nav-sidebar-icons-reverse` to `.nav-sidebar` container

##### Navigation options

###### Collapsible and accordion types

Flexible template functionality offers 2 different kinds of navigation: collapsible and accordion. Both have custom jQuery code and provide extended control over the child nav items. Default type is `collapsible` navigation: open as many child levels as you want, they all will be visible all the time. Second type is `accordion` navigation: allows to display only 1 parent level, collapsing all others. Both navigation types have hidden 2nd level in mini sidebar that opens on hover.

Collapsible navigation markup

    <!-- Default navigation markup -->
    <ul class="nav nav-sidebar nav-sidebar-icons-reverse" data-nav-type="collapsible">
    	<li class="nav-item-header">
    		<div class="text-uppercase font-size-sm line-height-sm">Sidebar header</div>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link">
    			Top level link
    		</a>
    	</li>

    	<li class="nav-item nav-item-submenu">
    		<a href="#" class="nav-link">With children</a>

    		<ul class="nav nav-group-sub">
    			<li class="nav-item">
    				<a href="#" class="nav-link">
    					Second level link
    				</a>
    			</li>
    			<li class="nav-item">
    				<a href="#" class="nav-link">
    					Second level link
    				</a>
    			</li>
    		</ul>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link disabled">Disabled Item</a>
    	</li>
    </ul>
    <!-- /default navigation markup -->

Accordion navigation markup

    <!-- Accordion navigation markup -->
    <ul class="nav nav-sidebar nav-sidebar-icons-reverse" data-nav-type="accordion">
    	<li class="nav-item-header">
    		<div class="text-uppercase font-size-sm line-height-sm">Sidebar header</div>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link">
    			Top level link
    		</a>
    	</li>

    	<li class="nav-item nav-item-submenu">
    		<a href="#" class="nav-link">With children</a>

    		<ul class="nav nav-group-sub">
    			<li class="nav-item">
    				<a href="#" class="nav-link">
    					Second level link
    				</a>
    			</li>
    			<li class="nav-item">
    				<a href="#" class="nav-link">
    					Second level link
    				</a>
    			</li>
    		</ul>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link disabled">Disabled Item</a>
    	</li>
    </ul>
    <!-- /accordion navigation markup -->

###### Icons alignment

Sidebar navigation supports icons in all menu levels. Default icons alignment is `left`. All icons have absolute position, allowing parent link text wrap and keep permanent left padding. Left icons alignment allows you to keep a visual hierarchy: icon > text > arrow (label), but right icons alignment makes usage of arrows useless as they won't be visible. To change icons alignment just add `.nav-sidebar-icons-reverse` to the `.nav-sidebar` container, CSS will do the rest.

Default left icons alignment

    <!-- Left icons alignment -->
    <ul class="nav nav-sidebar" data-nav-type="accordion">
    	<li class="nav-item-header">
    		<div class="text-uppercase font-size-sm line-height-sm">Sidebar header</div>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link">
    			<i class="icon-strategy"></i>
    			Top level link
    		</a>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link disabled"><i class="icon-make-group"></i> Disabled Item</a>
    	</li>
    </ul>
    <!-- /left icons alignment -->

Optional right icons alignment

    <!-- Right icons alignment -->
    <ul class="nav nav-sidebar nav-sidebar-icons-reverse" data-nav-type="accordion">
    	<li class="nav-item-header">
    		<div class="text-uppercase font-size-sm line-height-sm">Sidebar header</div>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link">
    			<i class="icon-strategy"></i>
    			Top level link
    		</a>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link disabled"><i class="icon-make-group"></i> Disabled Item</a>
    	</li>
    </ul>
    <!-- /right icons alignment -->

###### Bordered navigation

By default, vertical sidebar navigation doesn't have clear visual separation between nav items, it has its own advantages and disadvantages - thanks to bigger vertical padding, nav items are readable enough and match general design theme. But in some cases you might want to highlight them by adding horizontal lines to them. This is where this nav style preset might be handy. To use, simply add `.nav-sidebar-bordered` class to main sidebar nav container..

Navigation without borders

    <!-- Navigation without borders -->
    <ul class="nav nav-sidebar" data-nav-type="accordion">
    	<li class="nav-item-header">
    		<div class="text-uppercase font-size-sm line-height-sm">Sidebar header</div>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link">
    			<i class="icon-strategy"></i>
    			Top level link
    		</a>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link active">
    			<i class="icon-puzzle4"></i>
    			Active link
    		</a>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link disabled">
    			<i class="icon-make-group"></i>
    			Disabled link
    		</a>
    	</li>
    </ul>
    <!-- /navigation without borders -->

Navigation with borders

    <!-- Navigation with borders -->
    <ul class="nav nav-sidebar nav-sidebar-bordered" data-nav-type="accordion">
    	<li class="nav-item-header">
    		<div class="text-uppercase font-size-sm line-height-sm">Sidebar header</div>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link">
    			<i class="icon-strategy"></i>
    			Top level link
    		</a>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link active">
    			<i class="icon-puzzle4"></i>
    			Active link
    		</a>
    	</li>

    	<li class="nav-item">
    		<a href="#" class="nav-link disabled">
    			<i class="icon-make-group"></i>
    			Disabled link
    		</a>
    	</li>
    </ul>
    <!-- /navigation with borders -->

##### Navigation classes

This table contains all classes related to the vertical sidebar navigation. Vertical navigation is a custom layout element that uses global `nav` component classes and adapted for main navigation purposes. Depending on the needs, it supports different options such as collapsing type, icons, badges, combination with other sidebar components etc. This list explains the logic and purpose:

Class | Description
--- | ---
`.nav` | Global wrapper for navigation list. It uses default Bootstrap's styles of `.nav` component and similar markup options.
`.nav-sidebar` | Default navigation class, must be used with any navigation type and color. Responsible for targeting specific style changes and basic styling of item colors, borders and icons.
`.nav-item-header` | Targets optional `header` element for separating group of nav items. In main sidebar this class is responsible for toggling text in folded sidebar mode. Use text utility classes to style inner content.
`.nav-item-divider` | Navigation item with this class separates groups of related menu items - it adds thick light (dark in light sidebar) line with extra vertical spacing. Useful in long lists.
`.nav-item` | This class is required as an immediate nav link parent in any `.nav` container. Since active link color is different from hover and initial states color, `.nav-item` has 1px vertical spacing to separate items that have same background color. Dropdown menu items have same logic.
`.nav-link` | This class is responsible for navigation link styling and is also required as a part of nav list class structure. It's also a target for `.active` and `disabled` states. Please note - this class doesn't reset `<button>` styles, so make sure you use `<a>` instead.
`.nav-link.active` | Combination of these classes in a single `<a>` element highlights nav item link and indicates the current page. By default, expanded submenu and `active` item state color is the same in each level.
`.nav-link.disabled` | Combination of these classes in a single `<a>` element disables all pointer and click events and mutes out nav link text and background colors.
`.nav-item-submenu` | This class indicates nav list item with children menu levels and needs to be added to `.nav-item` container.
`.nav-item-expanded` | Responsible for expanding submenu on page load - this class should be added to `.nav-item` container in all levels.
`.nav-item-open` | This class also should be used in combination with `.nav-item` and/or `.nav-item-expanded` classes, since it's responsible for some styling and toggles dynamically.
`.nav-group-sub` | Navigation submenu class - should be used with `.nav` class in `<ul>` element in all menu levels.
`.nav-sidebar-icons-reverse` | Add this class to `.nav-sidebar` container to change icons alignment from `left` to `right`.
`.nav-sidebar-bordered` | Add this class to `.nav-sidebar` container if you want to add horizontal borders to all navigation links on the first level.
`[data-nav-type="collapsible"]` | Default navigation behaviour - when new item is expanded, current level remains opened. Actually navigation container doesn't require this, but is used for the sake of semantic naming.
`[data-nav-type="accordion"]` | Changes default `collapsible` navigation type to `accordion` type - when new item is expanded, current level is collapsed.
`[data-submenu-title="..."]` | This data attribute adds the title to the second menu level in main sidebar in folded mode. Use it in `.nav-group-sub` container.