Tamk.fi W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “list” role is unnecessary for element “ul”.
The “contentinfo” role is unnecessary for element “footer”.
Errors:
Bad value “list” for attribute “role” on element “li”.
An element with “role=menuitem” must be contained in, or owned by, an element with “role=menubar” or “role=menu”.
Element “input” with attribute “type” whose value is “button” must have non-empty attribute “value”.
Attribute “aria-selected” not allowed on element “li” at this point.
Attribute “allow” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
End tag “main” seen, but there were open elements.
Unclosed element “div”.
Stray end tag “div”.
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