Menu custom link not working for external site

I've got this header menu in my site (made editing a theme), but i've noticed that the custom links pointing at local anchor section (like #section) correctly navigate in the same page to the desired location, but an external link won't work, even if specifing "open in new tab". I suppose something is preventing the menu link to open, or worse, the external link is not supported in that theme. Since i'm noob, where should i look for the menu item/link opening behaviour? Would it be easy to modify such behaviour?

the menu element html is the following:

li id="menu-item-812" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-812 level-0"a class="menu-item-href" href="#societa"span class="line_wrap"span class="line"/spanL’Agenzia/span/a/li
a class="menu-item-href" href="#societa"span class="line_wrap"span class="line"/spanL’Agenzia/span/a

If i create an external link is the same, the url goes as www.google.com (for example) in the href.

Topic headers links menus Wordpress

Category Web

1
answered at

Resolved, i've manually added the "external" css class to menu link, as suggested here https://github.com/ChrisWojcik/single-page-nav/issues/1

Actually, that didn't work, the problem is still the page wich is intended to be single pag navigation, which is preventink external link from opening, because I think the smooth to-section movement is not coded for managing also external link

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