Telgraf.net W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
Bad value “cache-control” for attribute “http-equiv” on element “meta”.
Bad value “pragma” for attribute “http-equiv” on element “meta”.
Attribute “0” not allowed on element “li” at this point.
Attribute “type” not allowed on element “form” at this point.
Bad value “” for attribute “name” on element “button”: Must not be empty.
Duplicate ID “yw0”.
Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
End tag “a” violates nesting rules.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Attribute “visible” not allowed on element “li” at this point.
Attribute “size” not allowed on element “div” at this point.
Warnings:
Attribute “0” is not serializable as XML 1.0.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “yw0” was here.
Empty heading.
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