Citylit.ac.uk W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Errors:
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
The “version” attribute on the “html” element is obsolete. You can safely omit it.
Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value “cleartype” for attribute “http-equiv” on element “meta”.
Duplicate attribute “class”.
Element “img” is missing required attribute “src”.
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
Attribute “href” not allowed on element “div” at this point.
Warnings:
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
United Kingdom GB