Rzg.pl W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
End tag “header” seen, but there were open elements.
Unclosed element “div”.
The text content of element “time” was not in the required format: The literal did not satisfy the time-datetime format.
Element “img” is missing required attribute “src”.
Bad value “” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
The “center” element is obsolete. Use CSS instead.
Duplicate ID “Layer_1”.
Bad value “x-tmpl-mustache” for attribute “type” on element “script”: Subtype missing.
Stray end tag “script”.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
The “aria-controls” attribute must point to an element in the same document.
Warnings:
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “Layer_1” was here.
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