Jamesdysonfoundation.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “en_US” for attribute “lang” on element “html”: The language subtag “en_us” is not a valid language subtag.
Element “ul” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
No “p” element in scope but a “p” end tag seen.
CSS: “background-color”: Parse Error.
Element “p” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray end tag “span”.
Element “div” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)
Attribute “gesture” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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