I'm working on a custom project for a client and having an issue adding in data-scroll before the links in WordPress. I want the output to be <a data-scroll href='#'>.
Data-scroll is what I am looking to add in just after the a, here href ="#"
Hope someone can help me out.
A Custom Walker would be the best way to add anything anywhere to your wp_nav_menu
You hav to keep the following in your function.php
<?php class MV_Cleaner_Walker_Nav_Menu extends Walker { var $tree_type = array( 'post_type', 'taxonomy', 'custom' ); var $db_fields = array( 'parent' => 'menu_item_parent', 'id' => 'db_id' ); function start_lvl(&$output, $depth) { $indent = str_repeat("\t", $depth); $output .= "\n$indent<ul class=\"sub-menu\">\n"; } function end_lvl(&$output, $depth) { $indent = str_repeat("\t", $depth); $output .= "$indent</ul>\n"; } function start_el(&$output, $item, $depth, $args) { global $wp_query; $indent = ( $depth ) ? str_repeat( "\t", $depth ) : ''; $class_names = $value = ''; $classes = empty( $item->classes ) ? array() : (array) $item->classes; $classes = in_array( 'current-menu-item', $classes ) ? array( 'current-menu-item' ) : array(); $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args ) ); $class_names = strlen( trim( $class_names ) ) > 0 ? ' class="' . esc_attr( $class_names ) . '"' : ''; $id = apply_filters( 'nav_menu_item_id', '', $item, $args ); $id = strlen( $id ) ? ' id="' . esc_attr( $id ) . '"' : ''; $output .= $indent . '<li' . $id . $value . $class_names .'>'; $attributes = ! empty( $item->attr_title ) ? ' title="' . esc_attr( $item->attr_title ) .'"' : ''; $attributes .= ! empty( $item->target ) ? ' target="' . esc_attr( $item->target ) .'"' : ''; $attributes .= ! empty( $item->xfn ) ? ' rel="' . esc_attr( $item->xfn ) .'"' : ''; $attributes .= ! empty( $item->url ) ? ' href="' . esc_attr( $item->url ) .'"' : ''; $item_output = $args->before; $item_output .= '<a data-scroll'. $attributes .'>'; $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after; $item_output .= '</a>'; $item_output .= $args->after; $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ); } function end_el(&$output, $item, $depth) { $output .= "</li>\n"; } } ?> and then you can call the menu by
<?php wp_nav_menu( array( 'menu'=>'Footer Menu 1', menu_class => 'menu vertical footer-menu', 'walker' => new MV_Cleaner_Walker_Nav_Menu() ) ); ?> 
Walker when the Walker_Nav_Menu class already exposes the appropriate filter (nav_menu_link_attributes) for you to add custom attributes. A custom walker for this purpose just adds an additional layer of complexity. You'll want to use the following filter:
Example:
function filter_nav_menu_link_attributes($atts, $item, $args) { if ( isset($args->theme_location) && $args->theme_location === 'my-menu-location' ) { $atts['data-scroll'] = 'some-value'; } return $atts; } add_filter('nav_menu_link_attributes', 'filter_nav_menu_link_attributes', 10, 3); Use $item and $args to isolate and act on the specific menu or specific menu item in which you wish to add your attribute to.
Read more here: nav_menu_link_attributes
You need to add this code on functions.php file of current theme.
add_action( 'wp_footer', 'add_attr_nav_menu_link' ); function add_attr_nav_menu_link(){ ?> <script type="text/javascript"> jQuery( document ).ready(function() { jQuery('.nav-menu ul.menu li a').each(function() { jQuery(".nav-menu ul.menu li a").attr('data-scroll', ''); }); }); </script> <?php } Let me know if you have any query!!!!
