Cnduk.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “style” not allowed as child of element “header” in this context. (Suppressing further errors from this subtree.)
No “p” element in scope but a “p” end tag seen.
Stray end tag “a”.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Text not allowed in element “iframe” in this context.
The “for” attribute of the “label” element must refer to a non-hidden form control.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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