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”.
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Attribute “text-align” not allowed on element “div” at this point.
Element “div” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “CityHeader”.
Attribute “href” not allowed on element “div” at this point.
Duplicate ID “submenubtn”.
Attribute “text-align” not allowed on element “a” at this point.
Duplicate ID “main”.
Bad value “home detail” for attribute “id” on element “div”: An ID must not contain whitespace.
No space between attributes.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “mailinglistlink"” not allowed on element “a” at this point.
The “aria-controls” attribute must point to an element in the same document.
Warnings:
The “banner” role is unnecessary for element “header”.
The first occurrence of ID “CityHeader” was here.
The first occurrence of ID “submenubtn” was here.
The first occurrence of ID “main” was here.
The “contentinfo” role is unnecessary for element “footer”.
Attribute “mailinglistlink"” is not serializable as XML 1.0.
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