Question

So I have created my own module that overrides Topmenu.php.

  <?php
    
    namespace Perso\Menu\Block\Html;
    
    class Topmenu extends \Magento\Theme\Block\Html\Topmenu
    
    {
     protected function _getHtml(            \Magento\Framework\Data\Tree\Node $menuTree,            $childrenWrapClass,            $limit,            $colBrakes = []
        ) {            $html = '';    
            $children = $menuTree->getChildren();            $parentLevel = $menuTree->getLevel();            $childLevel = $parentLevel === null ? 0 : $parentLevel + 1;    
            $counter = 1;            $itemPosition = 1;            $childrenCount = $children->count();    
            $parentPositionClass = $menuTree->getPositionClass();            $itemPositionClassPrefix = $parentPositionClass ? $parentPositionClass . '-' : 'nav-';
    
            foreach ($children as $child) {                $child->setLevel($childLevel);                $child->setIsFirst($counter == 1);                $child->setIsLast($counter == $childrenCount);                $child->setPositionClass($itemPositionClassPrefix . $counter);    
                $outermostClassCode = '';                $outermostClass = $menuTree->getOutermostClass();
    
                if ($childLevel == 0 && $outermostClass) {                    $outermostClassCode = ' class="' . $outermostClass . '" ';                    $child->setClass($outermostClass);
                }
    
                if (count($colBrakes) && $colBrakes[$counter]['colbrake']) {                    $html .= '</ul></li><li class="column"><ul>';
                }    
                $html .= '<li ' . $this->_getRenderedMenuItemAttributes($child) . '>';            
                $html .= '<span class="menu" data-atc="'.base64_encode($child->getUrl()) . '" ' . $outermostClassCode . '>'
                    . $this->escapeHtml($child->getName())
                    . '</span>' . $this->_addSubMenu(                        $child,                        $childLevel,                        $childrenWrapClass,                        $limit
                    ) . '</li>';                
                $itemPosition++;                $counter++;
            }
    
            if (count($colBrakes) && $limit) {                $html = '<li class="column"><ul>' . $html . '</ul></li>';
            }
    
            return $html;
        }
    }

Then I have created a custom JS that replace that do the opposite when someone mouves the mouse or scroll down. It turns the in .

require(['jquery', 'jquery/ui'], function($){
var job= false;
function update_dom(){
  if(job == false)
  {    $(".menu").each(function(){
      var url = atob($(this).attr("data-atc"));
      var anchor = $(this).html();     $(this).replaceWith('<a   href="'+url+'" target="_self" >'+anchor+'</a>');
    });    job= true;
  }
}$(function(){  $("body").mousemove(update_dom);  $("body").scroll(update_dom);  $("body").touchmove(update_dom);
});
}

My purpose is to avoid Google follow my mega menu links but allow my visitors to navigate with proper <a href>. So Google sees with base 64 encrypted "data-atc" where users see classic <a href>.

My problem : if I move my mouse when the page is loading, everything is fine (my source code is with <span> instead of <a href>, my menu and submenu load as <span> then turn into <a href> etc...everything is perfect). But if I don't move my mouse during the loading and let it end, when I move it, my submenu doesn't appear. My menu and submenu are loaded but when my mouse comes over my top menu element the action of displaying <display : block> my submenu is not working.

It looks like magento needs both <a> and class ="level-top" in Topmenu.php to activate the display:block action... I really don't know how to do...

Mega menu links base 64 encryption on Magento 2.3

Mega menu links base 64 encryption on Magento 2.3