Shortlist.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”.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Attribute “content” not allowed on element “link” at this point.
Element “link” is missing required attribute “href”.
No space between attributes.
The element “footer” must not appear as a descendant of the “header” element.
Element “img” is missing required attribute “src”.
Bad value “50vw, (min-width: 34.375em) 33vw, (min-width: 62.5em) 176px” for attribute “sizes” on element “img”: Expected media condition before “” at “50vw,”.
The “sizes” attribute may be specified only if the “srcset” attribute is also present.
Warnings:
The “banner” role is unnecessary for element “header”.
The “main” role is unnecessary for element “main”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “contentinfo” role is unnecessary for element “footer”.
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