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231 lines
7.7 KiB
Markdown
231 lines
7.7 KiB
Markdown
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---
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layout: docs
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title: Navbar
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group: components
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---
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The navbar is a simple wrapper for positioning branding, navigation, and other elements into a concise navigation header. It's easily extensible and, with the help of our collapse plugin, it can easily integrate offscreen content.
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## Contents
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* Will be replaced with the ToC, excluding the "Contents" header
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{:toc}
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## Basics
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Here's what you need to know before getting started with the navbar:
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- Navbars require a wrapping `.navbar` and a [color scheme](#color-schemes).
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- Navbars and their contents are fluid by default. Use [optional containers](#containers) to limit their horizontal width.
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- Use `.pull-left` and `.pull-right` to quickly align sub-components.
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- Ensure accessibility by using a `<nav>` element or, if using a more generic element such as a `<div>`, add a `role="navigation"` to every navbar to explicitly identify it as a landmark region for users of assistive technologies.
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## Supported content
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Navbars come with built-in support for a handful of sub-components. Mix and match from the following as you need:
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- `.navbar-brand` for your company, product, or project name
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- `.navbar-nav` for a full-height and lightweight navigation (including support for dropdowns)
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- `.navbar-form` for vertically centering default-sized inputs and buttons.
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- `.navbar-toggler` for use with our collapse plugin and other navigation toggling behaviors.
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Here's an example of all the sub-components included in a default, light navbar:
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{% example html %}
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<nav class="navbar navbar-light bg-faded">
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<a class="navbar-brand" href="#">Navbar</a>
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<ul class="nav navbar-nav">
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<li class="nav-item active">
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<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">Features</a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">Pricing</a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">About</a>
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</li>
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</ul>
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<form class="form-inline navbar-form pull-right">
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<input class="form-control" type="text" placeholder="Search">
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<button class="btn btn-success-outline" type="submit">Search</button>
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</form>
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</nav>
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{% endexample %}
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## Color schemes
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Theming the navbar has never been easier thanks to the combination of a simple link color modifier class and `background-color` utilities. Put another way, you specify light or dark and apply a background color.
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Here are some examples to show what we mean.
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<div class="bd-example">
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<nav class="navbar navbar-dark bg-inverse">
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<a class="navbar-brand" href="#">Navbar</a>
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<ul class="nav navbar-nav">
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<li class="nav-item active">
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<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">Features</a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">Pricing</a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">About</a>
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</li>
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</ul>
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<form class="form-inline navbar-form pull-right">
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<input class="form-control" type="text" placeholder="Search">
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<button class="btn btn-info-outline" type="submit">Search</button>
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</form>
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</nav>
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<nav class="navbar navbar-dark bg-primary">
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<a class="navbar-brand" href="#">Navbar</a>
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<ul class="nav navbar-nav">
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<li class="nav-item active">
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<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">Features</a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">Pricing</a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">About</a>
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</li>
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</ul>
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<form class="form-inline navbar-form pull-right">
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<input class="form-control" type="text" placeholder="Search">
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<button class="btn btn-secondary-outline" type="submit">Search</button>
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</form>
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</nav>
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<nav class="navbar navbar-light" style="background-color: #e3f2fd;">
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<a class="navbar-brand" href="#">Navbar</a>
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<ul class="nav navbar-nav">
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<li class="nav-item active">
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<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">Features</a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">Pricing</a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">About</a>
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</li>
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</ul>
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<form class="form-inline navbar-form pull-right">
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<input class="form-control" type="text" placeholder="Search">
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<button class="btn btn-primary-outline" type="submit">Search</button>
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</form>
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</nav>
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</div>
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{% highlight html %}
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<nav class="navbar navbar-dark bg-inverse">
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<!-- Navbar content -->
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</nav>
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<nav class="navbar navbar-dark bg-primary">
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<!-- Navbar content -->
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</nav>
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<nav class="navbar navbar-light" style="background-color: #e3f2fd;">
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<!-- Navbar content -->
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</nav>
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{% endhighlight %}
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## Containers
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Although it's not required, you can wrap a navbar in a `.container` to center it on a page or add one within to only center the contents of the navbar.
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{% example html %}
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<div class="container">
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<nav class="navbar navbar-light bg-faded">
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<a class="navbar-brand" href="#">Navbar</a>
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</nav>
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</div>
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{% endexample %}
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{% example html %}
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<nav class="navbar navbar-light bg-faded">
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<div class="container">
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<a class="navbar-brand" href="#">Navbar</a>
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</div>
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</nav>
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{% endexample %}
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## Placement
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Navbars can be statically placed (their default behavior), static without rounded corners, or fixed to the top or bottom of the viewport.
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{% example html %}
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<nav class="navbar navbar-full navbar-light bg-faded">
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<a class="navbar-brand" href="#">Full width</a>
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</nav>
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{% endexample %}
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{% example html %}
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<nav class="navbar navbar-fixed-top navbar-light bg-faded">
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<a class="navbar-brand" href="#">Fixed top</a>
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</nav>
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{% endexample %}
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{% example html %}
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<nav class="navbar navbar-fixed-bottom navbar-light bg-faded">
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<a class="navbar-brand" href="#">Fixed bottom</a>
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</nav>
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{% endexample %}
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## Collapsible content
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Our collapse plugin allows you to use a `<button>` or `<a>` to toggle hidden content.
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{% example html %}
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<div class="collapse" id="exCollapsingNavbar">
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<div class="bg-inverse p-a">
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<h4>Collapsed content</h4>
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<span class="text-muted">Toggleable via the navbar brand.</span>
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</div>
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</div>
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<nav class="navbar navbar-light bg-faded">
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<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#exCollapsingNavbar">
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☰
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</button>
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</nav>
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{% endexample %}
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For more complex navbar patterns, like those used in Bootstrap v3, use the `.navbar-toggleable-*` classes in conjunction with the `.navbar-toggler`. These classes override our responsive utilities to show navigation only when content is meant to be shown.
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{% example html %}
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<nav class="navbar navbar-light bg-faded">
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<button class="navbar-toggler hidden-sm-up" type="button" data-toggle="collapse" data-target="#exCollapsingNavbar2">
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☰
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</button>
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<div class="collapse navbar-toggleable-xs" id="exCollapsingNavbar2">
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<a class="navbar-brand" href="#">Responsive navbar</a>
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<ul class="nav navbar-nav">
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<li class="nav-item active">
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<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">Features</a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">Pricing</a>
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</li>
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<li class="nav-item">
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<a class="nav-link" href="#">About</a>
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</li>
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</ul>
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</div>
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</nav>
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{% endexample %}
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