A custom WordPress nav walker class to fully implement the Bootstrap 4.0+ navigation style in a custom theme using the WordPress built in menu manager.
There are many changes Bootstrap 3.x & Bootstrap 4.0 that affect both how the nav walker class is used and what the walker supports. For CSS changes I recommend reading the Migrating from 3.x to 4.0 in the official Bootstrap docs http://v4-alpha.getbootstrap.com/migration/
The most noticeable functionality change in Bootstrap 3.0.0+ is that it only supports a single dropdown level. This script is intended to implement the Bootstrap 3.0 menu structure without adding additional features, so additional dropdown levels will not be supported.
If you would like to use Bootstrap 3.x you can find the legacy version of the walker class here
There are many changes Bootstrap 2.x & Bootstrap 3.0 that affect both how the nav walker class is used and what the walker supports. For CSS changes I recommend reading the Migrating from 2.x to 3.0 in the official Bootstrap docs http://getbootstrap.com/getting-started/#migration
The most noticeable functionality change in Bootstrap 3.0.0+ is that it only supports a single dropdown level. This script is intended to implement the Bootstrap 3.0 menu structure without adding additional features, so additional dropdown levels will not be supported.
If you would like to use Bootstrap 2.x you can find the legacy version of the walker class here https://github.com/twittem/wp-bootstrap-navwalker/tree/For-Bootstrap-2.3.2
This is a utility class that is intended to format your WordPress theme menu with the correct syntax and classes to utilize the Bootstrap dropdown navigation, and does not include the required Bootstrap JS files. You will have to include them manually.
Place wp_bootstrap_navwalker.php in your WordPress theme folder /wp-content/your-theme/
Open your WordPress themes functions.php file /wp-content/your-theme/functions.php and add the following code:
// Register Custom Navigation Walker
require_once('wp_bootstrap_navwalker.php');Update your wp_nav_menu() function in header.php to use the new walker by adding a "walker" item to the wp_nav_menu array.
<?php
wp_nav_menu( array(
'menu' => 'primary',
'theme_location' => 'primary',
'depth' => 2,
'container' => 'div',
'container_class' => 'collapse navbar-collapse',
'container_id' => 'bs-example-navbar-collapse-1',
'menu_class' => 'nav navbar-nav',
'fallback_cb' => 'wp_bootstrap_navwalker::fallback',
'walker' => new wp_bootstrap_navwalker())
);
?>Your menu will now be formatted with the correct syntax and classes to implement Bootstrap dropdown navigation.
You will also want to declare your new menu in your functions.php file.
register_nav_menus( array(
'primary' => __( 'Primary Menu', 'THEMENAME' ),
) );Typically the menu is wrapped with additional markup, here is an example of a navbar-fixed-top menu that collapse for responsive navigation.
<nav class="navbar navbar-default" role="navigation">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" 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>
</button>
<a class="navbar-brand" href="<?php echo home_url(); ?>">
<?php bloginfo('name'); ?>
</a>
</div>
<?php
wp_nav_menu( array(
'menu' => 'primary',
'theme_location' => 'primary',
'depth' => 2,
'container' => 'div',
'container_class' => 'collapse navbar-collapse',
'container_id' => 'bs-example-navbar-collapse-1',
'menu_class' => 'nav navbar-nav',
'fallback_cb' => 'wp_bootstrap_navwalker::fallback',
'walker' => new wp_bootstrap_navwalker())
);
?>
</div>
</nav>To change your menu style add Bootstrap nav class names to the menu_class declaration.
Review options in the Bootstrap docs for more information on nav classes http://getbootstrap.com/components/#nav
To display the menu you must associate your menu with your theme location. You can do this by selecting your theme location in the Theme Locations list wile editing a menu in the WordPress menu manager.
This script included the ability to add Bootstrap dividers, dropdown headers, glyphicons and disables links to your menus through the WordPress menu UI.
Simply add a Link menu item with a URL of # and a Link Text or Title Attribute of divider (case-insensitive so ‘divider’ or ‘Divider’ will both work ) and the class will do the rest.
To add an Icon to your link simple place the Glyphicon class name in the links Title Attribute field and the class will do the rest. IE glyphicon-bullhorn
Adding a dropdown header is very similar, add a new link with a URL of # and a Title Attribute of dropdown-header (it matches the Bootstrap CSS class so it's easy to remember). set the Navigation Label to your header text and the class will do the rest.
To set a disabled link simply set the Title Attribute to disabled and the class will do the rest.
2.0.4
- Updated fallback function to accept args array from wp_nav_menu
2.0.3
- Included a fallback function that adds a link to the WordPress menu manager if no menu has been assigned to the theme location.
2.0.2
- Small tweak to ensure carets are only displayed on top level dropdowns.
2.0.1
- Added missing
activeclass to active menu items.
2.0
- Class was completly re-written using the latest Wordpress 3.6 walker class.
- Now full supports Bootstrap 3.0+
- Tested with wp_debug & the Theme Check plugin.
