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I am writing ul inside ul to make a accordion type of menu. But when I check my code below in html validator it gives me these errors
Element ul not allowed as child of element ul in this context. (Suppressing further errors from this subtree.) How can I write semantically correct html for ul in this case?
Here is my html
<nav class="row"> <ul class="menu"> <li> <a href="">Uutiset</a> </li> <ul class="inside"> <li><a href="">Fringilla Condimentum</a></li> <li><a href="">Lorem</a></li> <li><a href="">Fringillau</a></li> <li><a href="">Curabitur</a></li> <li><a href="">Mollis</a></li> <li><a href="">Ipsum</a></li> <li><a href="">Lorem</a></li> <li><a href="">Fringillau</a></li> <li><a href="">Curabitur</a></li> <li><a href="">Mollis</a></li> <li><a href="">Ipsum</a></li> </ul> <li><a href="">Foorumi</a></li> <li><a href="">Kauppa</a></li> <li><a href="">Messut</a></li> <li> <a href="">Asiakaspalvelu</a> </li> <ul class="inside"> <li><a href="">Tilaa lehti</a></li> <li><a href="">Muutos tilaukseen</a></li> <li><a href="">Lähetä uutisvinkki</a></li> <li><a href="">Anna palautetta</a></li> </ul> <li><a href="">Nakoislehti</a></li> <li><a href="">Nae meidat</a></li> </ul> </nav> 
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No it isn't valid. The only tag allowed directly inside a <ul> is a <li> so to place a <ul> inside another <ul> you need to do it the second way you show which is the only valid way.
<ul> HTML Tag The <ul> element is used to define an unordered list of items. Use an unordered list to contain <li> elements that do not need to be presented in numerical order and can be rearranged without changing the meaning of the list.
Definition and Usage The <ul> tag defines an unordered (bulleted) list. Use the <ul> tag together with the <li> tag to create unordered lists. Tip: Use CSS to style lists. Tip: For ordered lists, use the <ol> tag.
You must wrap every inner ULs with an LI, i.e.
<ul class="menu"> <li> <a href="">Uutiset</a> </li> <li> <---- <ul class="inside"> <li><a href="">Fringilla Condimentum</a></li> <li><a href="">Lorem</a></li> </ul> </li> <---- </ul> The children (direct descendants) of a ul element must all be li elements. This is a purely syntactic requirement.
The way to fix the error depends on semantics, however. If the inner lists correspond to subtopics of the topic of the preceding li, then you should wrap the inner list inside that li, e.g.
<li> <a href="">Asiakaspalvelu</a> <ul class="inside"> <li><a href="">Tilaa lehti</a></li> <li><a href="">Muutos tilaukseen</a></li> <li><a href="">Lähetä uutisvinkki</a></li> <li><a href="">Anna palautetta</a></li> </ul> </li> Technically, this means just moving one </li> tag forward. You may wish to change the nesting, though, to reflect the structure, but this is for HTML source readability only.
If, on the other hand, inner list is just items at a lower level in some sense, without being subordinate to a higher level item, you could wrap them inside a <li> that contains nothing more, e.g.
<ul class="menu"> <li> <a href="">Uutiset</a> </li> <li> <ul class="inside"> <li><a href="">Fringilla Condimentum</a></li> <li><a href="">Lorem</a></li> ... </ul> </li> ... Technically this means just wrapping <li> and </li> around the <ul> element.
However, this would normally indicate a design flaw. If you just want some items to be more nested, you should do that with styling rather than markup. And a list containing inner lists without relation to the items of the outer list is rather confusing.
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