Bootstrap/docs/components/navs.md

layout	title	description	group
docs	Navs	Documentation and examples for how to use Bootstrap's included navigation components.	components

Navigation available in Bootstrap share general markup and styles, from the base .nav class to the active and disabled states. Swap modifier classes to switch between each style.

Contents

• Will be replaced with the ToC, excluding the "Contents" header {:toc}

Base nav

The base .nav component is built with flexbox and provide a strong foundation for building all types of navigation components. It includes some style overrides (for working with lists), some link padding for larger hit areas, and basic disabled styling. No active states are included in the base nav.

{% example html %}

• Active
• Link
• Link
• Disabled

{% endexample %}

Classes are used throughout, so your markup can be super flexible. Use <ul>s like above, or roll your own with say a <nav> element. Because the .nav uses display: flex, the nav links behave the same as nav items would, but without the extra markup.

{% example html %}

Active Link Link Disabled {% endexample %}

Available styles

Change the style of .navs component with modifiers and utilities. Mix and match as needed, or build your own.

Horizontal alignment

Change the horizontal alignment of your nav with [flexbox utilities]({{ site.baseurl }}/layout/grid/#horizontal-alignment). By default, navs are left-aligned, but you can easily change them to center or right aligned.

Centered with .justify-content-center:

{% example html %}

• Active
• Link
• Link
• Disabled

{% endexample %}

Right-aligned with .justify-content-end:

{% example html %}

• Active
• Link
• Link
• Disabled

{% endexample %}

Vertical

Stack your navigation by changing the flex item direction with the .flex-column utility. Need to stack them on some viewports but not others? Use the responsive versions (e.g., .flex-sm-column).

{% example html %}

• Active
• Link
• Link
• Disabled

{% endexample %}

As always, vertical navigation is possible without <ul>s, too.

{% example html %}

Active Link Link Disabled {% endexample %}

Tabs

Takes the basic nav from above and adds the .nav-tabs class to generate a tabbed interface. Use them to create tabbable regions with our tab JavaScript plugin.

{% example html %}

• Active
• Link
• Link
• Disabled

{% endexample %}

Pills

Take that same HTML, but use .nav-pills instead:

{% example html %}

• Active
• Link
• Link
• Disabled

{% endexample %}

Fill and justify

Force your .nav's contents to extend the full available width one of two modifier classes. To proportionately fill all available space with your .nav-items, use .nav-fill. Notice that all horizontal space is occupied, but not every nav item has the same width.

{% example html %}

• Active
• Longer nav link
• Link
• Disabled

{% endexample %}

For equal-width elements, use .nav-justified. All horizontal space will be occupied by nav links, but unlike the .nav-fill above, every nav item will be the same width.

{% example html %}

• Active
• Longer nav link
• Link
• Disabled

{% endexample %}

Working with flex utilities

If you need responsive nav variations, consider using a series of [flexbox utilities]({{ site.baseurl }}/utilities/flexbox/). While more verbose, these utilities offer greater customization across responsive breakpoints. In the example below, our nav will be stacked on the lowest breakpoint, then adapt to a horizontal layout that fills the available width starting from the small breakpoint.

{% example html %}

Active Link Link Disabled {% endexample %}

Regarding accessibility

If you're using navs to provide a navigation bar, be sure to add a role="navigation" to the most logical parent container of the <ul>, or wrap a <nav> element around the whole navigation. Do not add the role to the <ul> itself, as this would prevent it from being announced as an actual list by assistive technologies.

Using dropdowns

Add dropdown menus with a little extra HTML and the [dropdowns JavaScript plugin]({{ site.baseurl }}/components/dropdowns/#usage).

Tabs with dropdowns

{% example html %}

• Active
• Dropdown
  Action Another action Something else here

  Separated link
• Link
• Disabled

{% endexample %}

Pills with dropdowns

{% example html %}

• Active
• Dropdown
  Action Another action Something else here

  Separated link
• Link
• Disabled

{% endexample %}

JavaScript behavior

Use the tab JavaScript plugin—include it individually or through the compiled bootstrap.js file—to extend our navigational tabs and pills to create tabbable panes of local content, even via dropdown menus.

• Home
• Profile
• Dropdown
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Using data attributes

You can activate a tab or pill navigation without writing any JavaScript by simply specifying data-toggle="tab" or data-toggle="pill" on an element. Use these data attributes on .nav-tabs or .nav-pills.

{% highlight html %}

• Home
• Profile
• Messages
• Settings

...

...

...

...

{% endhighlight %}

Via JavaScript

Enable tabbable tabs via JavaScript (each tab needs to be activated individually):

{% highlight js %} $('#myTab a').click(function (e) { e.preventDefault() $(this).tab('show') }) {% endhighlight %}

You can activate individual tabs in several ways:

{% highlight js %} $('#myTab a[href="#profile"]').tab('show') // Select tab by name $('#myTab a:first').tab('show') // Select first tab $('#myTab a:last').tab('show') // Select last tab $('#myTab li:eq(2) a').tab('show') // Select third tab (0-indexed) {% endhighlight %}

Fade effect

To make tabs fade in, add .fade to each .tab-pane. The first tab pane must also have .show to make the initial content visible.

{% highlight html %}

...

...

...

...

{% endhighlight %}

Methods

$().tab

Activates a tab element and content container. Tab should have either a data-target or an href targeting a container node in the DOM.

{% highlight html %}

• Home
• Profile
• Messages
• Settings

...

...

...

...

{% endhighlight %}

.tab('show')

Selects the given tab and shows its associated pane. Any other tab that was previously selected becomes unselected and its associated pane is hidden. Returns to the caller before the tab pane has actually been shown (i.e. before the shown.bs.tab event occurs).

{% highlight js %} $('#someTab').tab('show') {% endhighlight %}

Events

When showing a new tab, the events fire in the following order:

1. hide.bs.tab (on the current active tab)
2. show.bs.tab (on the to-be-shown tab)
3. hidden.bs.tab (on the previous active tab, the same one as for the hide.bs.tab event)
4. shown.bs.tab (on the newly-active just-shown tab, the same one as for the show.bs.tab event)

If no tab was already active, then the hide.bs.tab and hidden.bs.tab events will not be fired.

Event Type	Description
show.bs.tab	This event fires on tab show, but before the new tab has been shown. Use event.target and event.relatedTarget to target the active tab and the previous active tab (if available) respectively.
shown.bs.tab	This event fires on tab show after a tab has been shown. Use event.target and event.relatedTarget to target the active tab and the previous active tab (if available) respectively.
hide.bs.tab	This event fires when a new tab is to be shown (and thus the previous active tab is to be hidden). Use event.target and event.relatedTarget to target the current active tab and the new soon-to-be-active tab, respectively.
hidden.bs.tab	This event fires after a new tab is shown (and thus the previous active tab is hidden). Use event.target and event.relatedTarget to target the previous active tab and the new active tab, respectively.

{% highlight js %} $('a[data-toggle="tab"]').on('shown.bs.tab', function (e) { e.target // newly activated tab e.relatedTarget // previous active tab }) {% endhighlight %}