Gft.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
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 “en-UK” for attribute “hreflang” on element “link”: Bad region subtag.
Bad value “http://www.w3.org/1999/html” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
Bad value “tabpanel” for attribute “role” on element “li”.
Bad value “8-10 October 2018” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “09/08/2018” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Element “div” not allowed as child of element “h3” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “banner” role is unnecessary for element “header”.
Attribute “xmlns” is not serializable as XML 1.0.
The “main” role is unnecessary for element “main”.
The “contentinfo” role is unnecessary for element “footer”.
Poland PL