Knmv.nl W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
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.
Bad value “” for attribute “media” on element “link”: Media query ended prematurely.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
End tag “a” violates nesting rules.
Element “style” not allowed as child of element “nav” in this context. (Suppressing further errors from this subtree.)
Element “hr” not allowed as child of element “h2” in this context. (Suppressing further errors from this subtree.)
Attribute “content” not allowed on element “div” at this point.
Attribute “content” not allowed on element “a” at this point.
Attribute “content” not allowed on element “p” at this point.
Element “hr” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
No space between attributes.
Saw “"” when expecting an attribute name. Probable cause: “=” missing immediately before.
Attribute “"” not allowed on element “img” at this point.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Attribute “"” is not serializable as XML 1.0.
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