C-and-a.com W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Warnings:
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.
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:
Bad value “tel:0211-9872 7000” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
Stray end tag “section”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The element “iframe” must not appear as a descendant of the “a” element.
Element “h5” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
End tag “main” seen, but there were open elements.
Unclosed element “section”.
Attribute “target” not allowed on element “option” at this point.
Attribute “modelattribute” not allowed on element “form” at this point.
Stray end tag “div”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “itemprop” attribute was specified, but the element is not a property of any item.
Germany DE