Forewordreviews.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “x-pjax-version” for attribute “http-equiv” on element “meta”.
Attribute “itemprop” not allowed on element “link” at this point.
Element “div” not allowed as child of element “h1” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “(min-resolution: 2dppx) and (min-width: 600px) 200vw, (min-width: 600px) 100vw, 50vw” for attribute “sizes” on element “img”: Bad media condition: Expected a resolution unit but saw “)” instead at “…(min-width: 600px) 200vw,”.
The element “main” must not appear as a descendant of the “article” element.
Bad value for attribute “href” on element “a”: Illegal character in query: space is not allowed.
A “link” element must not appear as a descendant of a “body” element unless the “link” element has an “itemprop” attribute or has a “rel” attribute whose value contains “dns-prefetch”, “pingback”, “preconnect”, “prefetch”, “preload”, “prerender”, or “stylesheet”.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
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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