Warnings:
The “banner” role is unnecessary for element “header”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “nav” was here.
The first occurrence of ID “first_menu” was here.
The first occurrence of ID “items” was here.
The “contentinfo” role is unnecessary for element “footer”.
The first occurrence of ID “logo” was here.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
Errors:
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray end tag “ul”.
Duplicate ID “nav”.
Duplicate ID “first_menu”.
Duplicate ID “items”.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
End tag “div” seen, but there were open elements.
Unclosed element “ul”.
Element “data” is missing required attribute “value”.
Attribute “data_height” not allowed on element “div” at this point.
Attribute “data_weight” not allowed on element “div” at this point.
Attribute “width” not allowed on element “a” at this point.
Attribute “height” not allowed on element “a” at this point.
Duplicate ID “logo”.
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