Ultimouomo.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “menu-argomenti” was here.
The “main” role is unnecessary for element “main”.
The first occurrence of ID “post-24473” was here.
The first occurrence of ID “post-24187” was here.
The first occurrence of ID “post-24439” was here.
Errors:
Bad value “http://Matteo%20Gagliardi” for attribute “href” on element “link”: Invalid host: Illegal character in domain: space is not allowed.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Duplicate ID “menu-argomenti”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “post-24473”.
Duplicate ID “post-24187”.
Duplicate ID “post-24439”.
The “itemprop” attribute was specified, but the element is not a property of any item.
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