Spraachen.org W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Errors:
Bad value “de_DE” for attribute “lang” on element “meta”: The language subtag “de_de” is not a valid language subtag.
Bad value “en_US” for attribute “lang” on element “meta”: The language subtag “en_us” is not a valid language subtag.
A document must not include more than one “meta” element with its “name” attribute set to the value “description”.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Element “p” not allowed as child of element “h3” in this context. (Suppressing further errors from this subtree.)
No “p” element in scope but a “p” end tag seen.
The “aria-controls” attribute must point to an element in the same document.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “type” attribute is unnecessary for JavaScript resources.
The “type” attribute for the “style” element is not needed and should be omitted.
The “navigation” role is unnecessary for element “nav”.
Empty heading.
The “article” role is unnecessary for element “article”.
The “contentinfo” role is unnecessary for element “footer”.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
Germany DE