Stratego.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “banner” role is unnecessary for element “header”.
The “main” role is unnecessary for element “main”.
Attribute “;” is not serializable as XML 1.0.
The “article” role is unnecessary for element “article”.
The “contentinfo” role is unnecessary for element “footer”.
Errors:
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “span” is missing one or more of the following attributes: “role”.
Element “h2” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
No space between attributes.
Attribute “;” not allowed on element “img” at this point.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate attribute “target”.
The “aria-labelledby” attribute must point to an element in the same document.
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