Default navbar
Navbars are responsive meta components that serve as navigation headers for your application or site. They begin collapsed (and are toggleable) in mobile views and become horizontal as the available viewport width increases.
Justified navbar nav links are currently not supported.
Overflowing content
Since Bootstrap doesn't know how much space the content in your navbar needs, you might run into issues with content wrapping into a second row. To resolve this, you can:
- Reduce the amount or width of navbar items.
- Hide certain navbar items at certain screen sizes using responsive utility classes.
- Change the point at which your navbar switches between collapsed and horizontal mode. Customize the
@grid-float-breakpoint variable or add your own media query.
Requires JavaScript plugin
If JavaScript is disabled and the viewport is narrow enough that the navbar collapses, it will be impossible to expand the navbar and view the content within the .navbar-collapse.
The responsive navbar requires the collapse plugin to be included in your version of Bootstrap.
Changing the collapsed mobile navbar breakpoint
The navbar collapses into its vertical mobile view when the viewport is narrower than @grid-float-breakpoint, and expands into its horizontal non-mobile view when the viewport is at least @grid-float-breakpoint in width. Adjust this variable in the Less source to control when the navbar collapses/expands. The default value is 768px (the smallest "small" or "tablet" screen).
Make navbars accessible
<div class="navbar navbar-default">
<div class="container-fluid">
<div class="navbar-header">
<div class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1"><span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</div>
</div>
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1" role="navigation">
<ul class="nav navbar-nav">
<li class="active">[[Link]] <span class="sr-only">(current)</span></li>
<li>[[Link]]</li>
<li class="dropdown dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">[[Dropdown]]</li>
<ul class="dropdown-menu" role="menu">
<li>[[Action]]</li>
<li>[[Another action]]</li>
<li>[[Something else here]]</li>
<li class="divider"></li>
<li>[[Separated link]]</li>
<li class="divider"></li>
<li>[[One more separated link]]</li>
</ul>
</li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</div>
Mobile device caveats
There are some caveats regarding using form controls within fixed elements on mobile devices.
Context-specific usage
Like the standard button classes, .navbar-btn can be used on <a> However, neither .navbar-btn nor the standard button classes should be used on <a> elements within .navbar-nav.
Text
Wrap strings of text in an element with .navbar-text, usually on a <p> tag for proper leading and color.
Non-nav links
For folks using standard links that are not within the regular navbar navigation component, use the .navbar-link class to add the proper colors for the default and inverse navbar options.
Component alignment
Align nav links, forms, buttons, or text, using the .navbar-left or .navbar-right utility classes. Both classes will add a CSS float in the specified direction. For example, to align nav links, put them in a separate <ul> with the respective utility class applied.
These classes are mixin-ed versions of .pull-left and .pull-right, but they're scoped to media queries for easier handling of navbar components across device sizes.
Right aligning multiple components
Navbars currently have a limitation with multiple .navbar-right classes. To properly space content, we use negative margin on the last .navbar-right element. When there are multiple elements using that class, these margins don't work as intended.
We'll revisit this when we can rewrite that component in v4.
