37 KiB
| layout | title | description | group | toc |
|---|---|---|---|---|
| docs | Navs | Documentation and examples for how to use Bootstrap's included navigation components. | components | true |
Base nav
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.
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.
{% callout info %}
The base .nav component does not include any .active state. The following examples include the class, mainly to demonstrate that this particular class does not trigger any special styling.
{% endcallout %}
{% example html %}
{% 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 }}/docs/{{ site.docs_version }}/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 %}
{% endexample %}Right-aligned with .justify-content-end:
{% example html %}
{% 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 %}
{% 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 %}
{% endexample %}Pills
Take that same HTML, but use .nav-pills instead:
{% example html %}
{% 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 %}
{% endexample %}When using a <nav>-based navigation, be sure to include .nav-item on the anchors.
{% example html %}
Active 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 %}Similar to the .nav-fill example using a <nav>-based navigation, be sure to include .nav-item on the anchors.
{% example html %}
Active Link Link Disabled{% endexample %}
Working with flex utilities
If you need responsive nav variations, consider using a series of [flexbox utilities]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/flex/). 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.
Note that navigation bars, even if visually styled as tabs with the .nav-tabs class, should not be given role="tablist", role="tab" or role="tabpanel" attributes. These are only appropriate for dynamic tabbed interfaces, as described in the WAI ARIA Authoring Practices. See JavaScript behavior for dynamic tabbed interfaces in this section for an example.
Using dropdowns
Add dropdown menus with a little extra HTML and the [dropdowns JavaScript plugin]({{ site.baseurl }}/docs/{{ site.docs_version }}/components/dropdowns/#usage).
Tabs with dropdowns
{% example html %}
{% endexample %}Pills with dropdowns
{% example html %}
{% 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.
If you're building our JS from source, it [requires util.js]({{ site.baseurl }}/docs/{{ site.docs_version }}/getting-started/javascript/#util).
Dynamic tabbed interfaces, as described in the WAI ARIA Authoring Practices, require role="tablist", role="tab", role="tabpanel", and additional aria- attributes in order to convey their structure, functionality and current state to users of assistive technologies (such as screen readers).
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{% highlight html %}
To help fit your needs, this works with <ul>-based markup, as shown above, as well as <nav>-based markup shown below.
{% highlight html %}
Home Profile {% endhighlight %}The tabs plugin also works with pills.
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{% highlight html %}
And with vertical pills.
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{% highlight html %}
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 %}
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 %}
Methods
{% capture callout-include %}{% include callout-danger-async-methods.md %}{% endcapture %} {{ callout-include | markdownify }}
$().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 %}
{% 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:
hide.bs.tab(on the current active tab)show.bs.tab(on the to-be-shown tab)hidden.bs.tab(on the previous active tab, the same one as for thehide.bs.tabevent)shown.bs.tab(on the newly-active just-shown tab, the same one as for theshow.bs.tabevent)
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 %}