Ncarboretum.org W3C HTML Markup Validation
HTML markup errors and warnings
(Rescan now...)
Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Bad value “https://theeventscalendar.com/” for attribute “rel” on element “link”: The string “https://theeventscalendar.com/” 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.
Duplicate ID “Layer_1”.
Duplicate ID “Layer_4”.
Duplicate ID “Layer_3”.
Duplicate ID “Capa_1”.
Element “p” not allowed as child of element “h3” in this context. (Suppressing further errors from this subtree.)
The element “button” must not appear as a descendant of the “a” element.
Warnings:
The “main” role is unnecessary for element “main”.
The “banner” role is unnecessary for element “header”.
The first occurrence of ID “Layer_1” was here.
The first occurrence of ID “Layer_4” was here.
The first occurrence of ID “Layer_3” was here.
The first occurrence of ID “Capa_1” was here.
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 “contentinfo” role is unnecessary for element “footer”.
United States US