Sw.edu W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
End tag “br”.
Element “gcse:search” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
No “p” element in scope but a “p” end tag seen.
Duplicate ID “prog1”.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Element name “gcse:search” cannot be represented as XML 1.0.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “prog1” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
United States US