Libero.it W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “Cache-Control” for attribute “http-equiv” on element “meta”.
Bad value “Pragma” for attribute “http-equiv” on element “meta”.
Bad value “Expires” for attribute “http-equiv” on element “meta”.
Bad value “915;url=https://www.libero.it/?refresh_ce” for attribute “content” on element “meta”: Expected a space character, but saw “u” instead.
The element “button” must not appear as a descendant of the “a” element.
Bad value “follow noopener” for attribute “rel” on element “a”: The string “follow” is not a registered keyword.
Duplicate ID “hp_box_slider_label-1”.
Element “source” is missing required attribute “srcset”.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “hp_box_slider_label-1” was here.
The “button” role is unnecessary for element “button”.
The “type” attribute is unnecessary for JavaScript resources.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
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