Nbcuni.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “revision” for attribute “rel” on element “link”: The string “revision” is not a registered keyword.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
Element “div” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)
The element “a” must not appear as a descendant of the “button” element.
A numeric character reference expanded to carriage return.
Warnings:
The “complementary” role is unnecessary for element “aside”.
The “main” role is unnecessary for element “main”.
The “article” role is unnecessary for element “article”.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “type” attribute is unnecessary for JavaScript resources.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
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