Modernmasters.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “banner” role is unnecessary for element “header”.
The “main” role is unnecessary for element “main”.
The “charset” attribute on the “script” element is obsolete.
The “contentinfo” role is unnecessary for element “footer”.
The “type” attribute is unnecessary for JavaScript resources.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
Errors:
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “clsas” not allowed on element “line” at this point.
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
CSS: “white”: Parse Error.
The element “button” must not appear as a descendant of the “a” element.
No “p” element in scope but a “p” end tag seen.
The element “header” must not appear as a descendant of the “footer” element.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
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