Stork.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “og:http://ogp.me/ns#” for attribute “prefix” on element “html”.
Stray end tag “div”.
Attribute “ref” not allowed on element “a” at this point.
Duplicate ID “nav-sub”.
Attribute “attreventid” not allowed on element “a” at this point.
The text content of element “time” was not in the required format: The literal did not satisfy the time-datetime format.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “attrmaxelement” not allowed on element “div” at this point.
No “p” element in scope but a “p” end tag seen.
Attribute “href” not allowed on element “div” at this point.
Duplicate ID “logo”.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Empty heading.
The “main” role is unnecessary for element “main”.
The first occurrence of ID “nav-sub” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
The first occurrence of ID “logo” was here.
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).
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