Napratica.org.br W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Duplicate attribute “xmlns:fb”.
Attribute “xmlns:fb” not allowed here.
Attribute “xmlns:addthis” not allowed here.
The text content of element “script” was not in the required format: Expected space, tab, newline, or slash but found “e” instead.
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.
The element “a” must not appear as a descendant of the “button” element.
Element “style” not allowed as child of element “main” 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.
Duplicate ID “fb-root”.
Warnings:
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
Attribute with the local name “xmlns:addthis” is not serializable as XML 1.0.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “fb-root” was here.
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