Petromax.de 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.
Attribute “retina_logo_url” not allowed on element “img” at this point.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “width” on element “img”: The empty string is not a valid non-negative integer.
Bad value “” for attribute “height” on element “img”: The empty string is not a valid non-negative integer.
Element “div” not allowed as child of element “a” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “section” in this context. (Suppressing further errors from this subtree.)
Element “script” must not have attribute “defer” unless attribute “src” is also specified.
Warnings:
The “main” role is unnecessary for element “main”.
The “contentinfo” role is unnecessary for element “footer”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
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