theme development - Extend walker - navigation, adding data attribute to a tag - WordPress Development Stack Exchange
SOLVED: customize Walker_Nav_Menu - WPQuestions
Getting Familiar with the WordPress Walker Class - Pressidium® Managed WordPress Hosting
plugin development - Declaration of mandoe_menu_walker::start_el(&$output, $item, $depth, $args) must be compatible with Walker::start_el(...) - WordPress Development Stack Exchange
The WordPress Nav Walker Class: A Guided var_dump() | CSS-Tricks - CSS-Tricks
Redesigning WordPress Menus: Custom Walker Class
Learn How to Write Menu Walkers for WordPress Menus - A White Pixel
Extending Walker Class is currently a Night-mare · Issue #586 · wprig/wprig · GitHub
Getting Familiar with the WordPress Walker Class - Pressidium® Managed WordPress Hosting
navigation - Change an li class name in a wordpress custom menu walker - WordPress Development Stack Exchange