Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Text not allowed in element “iframe” in this context.
Bad value “https://twitter.com/share?url=https://mathix.org/linux/archives/10833&text=Permis rapporteur en javascript/html5(blog enseignant des maths)&via=durandarno” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value for attribute “href” on element “a”: Illegal character in query: space is not allowed.
“"” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
End tag “article” seen, but there were open elements.
Unclosed element “div”.
Bad value “https://twitter.com/share?url=https://mathix.org/linux/archives/10822&text=Capital Equiper sa maison : Vous avez vu l’erreur?(blog enseignant des maths)&via=durandarno” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “https://twitter.com/share?url=https://mathix.org/linux/archives/10814&text=Cédric Villani sur un problème de maths(blog enseignant des maths)&via=durandarno” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “center” element is obsolete. Use CSS instead.
The “aria-controls” attribute must point to an element in the same document.
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
The “main” role is unnecessary for element “main”.
The “contentinfo” role is unnecessary for element “footer”.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
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