Gewiss.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “xmlns:og” not allowed here.
Attribute “xmlns:fb” not allowed here.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
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 “script” must not have attribute “defer” unless attribute “src” is also specified.
Any “input” descendant of a “label” element with a “for” attribute must have an ID value that matches that “for” attribute.
Any “textarea” descendant of a “label” element with a “for” attribute must have an ID value that matches that “for” attribute.
Element “style” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “src” on element “img”: Must be non-empty.
Stray end tag “source”.
The element “button” must not appear as a descendant of the “a” element.
Element “div” not allowed as child of element “label” in this context. (Suppressing further errors from this subtree.)
The “for” attribute of the “label” element must refer to a non-hidden form control.
Warnings:
Attribute with the local name “xmlns:og” is not serializable as XML 1.0.
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
Consider avoiding viewport values that prevent users from resizing documents.
Empty heading.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
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