How2become.com W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
No space between attributes.
Stray doctype.
Element “style” not allowed as child of element “section” in this context. (Suppressing further errors from this subtree.)
Attribute “target” not allowed on element “div” at this point.
Attribute “href” not allowed on element “div” at this point.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Stray end tag “span”.
End tag “h2” seen, but there were open elements.
Unclosed element “span”.
Stray end tag “strong”.
Attribute “rel” not allowed on element “div” at this point.
The element “button” must not appear as a descendant of the “a” element.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
United Kingdom GB