Manchesterartgallery.org W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
End tag “li” seen, but there were open elements.
Unclosed element “div”.
Element “img” is missing required attribute “src”.
Forbidden code point U+0003.
Attribute “webkitallowfullscreen” not allowed on element “iframe” at this point.
Attribute “mozallowfullscreen” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Stray end tag “footer”.
End tag for “body” seen, but there were unclosed elements.
Stray start tag “script”.
Cannot recover after last error. Any further errors will be ignored.
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