Coolcat.nl 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 “navigation” role is unnecessary for element “nav”.
Empty heading.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
This document appears to be written in Dutch but the “html” start tag has “lang="en"”. Consider using “lang="nl"” (or variant) instead.
Errors:
Stray end tag “strong”.
Stray end tag “span”.
End tag “a” violates nesting rules.
Element “input” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “true” for attribute “preload” on element “video”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Element “li” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
Bad value “tel:030 635 6350” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
Attribute “selected” not allowed on element “a” at this point.
The “itemprop” attribute was specified, but the element is not a property of any item.
Netherlands NL