javascript:void() does not open the submenu

yes, so I need a mix of accordeon and the native menu. Isn't that possible with your menu module?

not yet but using the params I can imagine to use a css class to tell an item to not be accordeon. This is a feature that have to be implemented. Please remind me next week for this if you really need it

i will try to get it work with a couple of changes in my navigation...

but i have another problem: on mobile phones or in the developer tools of the browser the sub menu doesn't open. but there are no javascript errors...

I have checked and by my side the submenu opens correctly in both situations ...
please clear your cache and test again

I have tested it on some devices and with every browser. The problem is the same... Everywhere

I recorded a video with the problem. I hope it will help

ok I have retested more in deep by my side and I have the same issue on your website. could you please with the template protostar to see if it works ?