Cppinstitute.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “” for attribute “href” on element “link”: Must be non-empty.
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
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 “p” implied, but there were open elements.
Unclosed element “span”.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Stray end tag “span”.
No “p” element in scope but a “p” end tag seen.
Start tag “a” seen but an element of the same type was already open.
Stray end tag “a”.
End tag “p” seen, but there were open elements.
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.
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