Zbozi.cz W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Content-Security-Policy HTTP header: Bad content security policy: Unrecognised directive-name: "script-src-attr".
Bad value “0;url=?_escaped_fragment_=” for attribute “content” on element “meta”: Expected a space character, but saw “u” instead.
Bad value “true” for attribute “crossorigin” on element “link”.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
CSS: “scrollbar-width”: Property “scrollbar-width” doesn't exist.
Attribute “amp-fx” not allowed on element “header” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “article” for attribute “role” on element “section”.
CSS: “aspect-ratio”: Property “aspect-ratio” doesn't exist.
Attribute “loading” not allowed on element “img” at this point.
Bad value “navigation” for attribute “role” on element “ul”.
Warnings:
The “banner” role is unnecessary for element “header”.
The “main” role is unnecessary for element “main”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “navigation” role is unnecessary for element “nav”.
The “contentinfo” role is unnecessary for element “footer”.
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