Lexialearning.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “ImageToolbar” for attribute “http-equiv” on element “meta”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “about” not allowed on element “div” at this point.
Duplicate attribute “class”.
Attribute “content” not allowed on element “span” at this point.
Element “div” not allowed as child of element “h4” in this context. (Suppressing further errors from this subtree.)
Attribute “about” not allowed on element “article” at this point.
Element “div” not allowed as child of element “h6” in this context. (Suppressing further errors from this subtree.)
Warnings:
The “banner” role is unnecessary for element “header”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
The “main” role is unnecessary for element “main”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “contentinfo” role is unnecessary for element “footer”.
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