Explorista.nl 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.
Bad value “” for attribute “height” on element “img”: The empty string is not a valid non-negative integer.
Bad value “900px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.
Bad character “3” after “<”. Probable cause: Unescaped “<”. Try escaping it as “<”.
No “p” element in scope but a “p” end tag seen.
Warnings:
The “navigation” role is unnecessary for element “nav”.
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