Rumba.fi W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “itemprop” not allowed on element “meta” at this point.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Duplicate ID “Layer_1”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “rss” for attribute “rel” on element “a”: The string “rss” is not a registered keyword.
The element “header” must not appear as a descendant of the “footer” element.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
The first occurrence of ID “Layer_1” was here.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Empty heading.
The “contentinfo” role is unnecessary for element “footer”.
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