Mhs.net W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Attribute “ceid” not allowed on element “a” at this point.
Element “style” not allowed as child of element “section” in this context. (Suppressing further errors from this subtree.)
Bad value “100%” for attribute “width” on element “video”: Expected a digit but saw “%” instead.
Bad value “100%” for attribute “height” on element “video”: Expected a digit but saw “%” instead.
Attribute “type” not allowed on element “video” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “value” not allowed on element “a” at this point.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Empty heading.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
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