Gvi.co.uk W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “option” without attribute “label” must not be empty.
Duplicate attribute “class”.
Duplicate ID “page”.
Duplicate ID “searchform”.
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The “frameborder” attribute on the “iframe” element is obsolete.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.
The element “main” must not appear as a descendant of the “article” element.
No “p” element in scope but a “p” end tag seen.
End tag “article” seen, but there were open elements.
Unclosed element “div”.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The first occurrence of ID “page” was here.
The first occurrence of ID “searchform” was here.
Empty heading.
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