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"></span>L’Agenzia</span></a></li>
<a class="menu-item-href" href="#societa"><span class="line_wrap"><span class="line"></span>L’Agenzia</span></a>
If i create an external link is the same, the url goes as www.google.com (for example) in the href.