Tickmill.co.uk W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “cn-cn” for attribute “hreflang” on element “link”: The language subtag “cn” is not a valid ISO language part of a language tag.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “mobilenav” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Attribute “@click” not allowed on element “div” at this point.
Element “quotes” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Attribute “ref” not allowed on element “form” at this point.
Attribute “ref” not allowed on element “input” at this point.
Attribute “ref” not allowed on element “button” at this point.
Attribute “@click” not allowed on element “button” at this point.
Element “support” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Warnings:
Attribute “@click” is not serializable as XML 1.0.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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