Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “contentinfo” role is unnecessary for element “footer”.
Empty heading.
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).
Attribute “<” is not serializable as XML 1.0.
This document appears to be written in Dutch. Consider adding “lang="nl"” (or variant) to the “html” start tag.
Errors:
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Bad value “header” for attribute “role” on element “header”.
End tag “a” violates nesting rules.
Attribute value missing.
Element “span” not allowed as child of element “picture” in this context. (Suppressing further errors from this subtree.)
Element “picture” is missing a required instance of child element “img”.
Element “source” is missing required attribute “srcset”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “noscript” not allowed as child of element “picture” in this context. (Suppressing further errors from this subtree.)
Saw “<” when expecting an attribute name. Probable cause: Missing “>” immediately before.
A slash was not immediately followed by “>”.
Stray end tag “picture”.
End tag “header” seen, but there were open elements.
Unclosed element “noscript”.
Unclosed element “picture”.
Netherlands NL