Sopro.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 “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “home-collapse4” was here.
Errors:
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “form” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “img” is missing required attribute “src”.
No “li” element in scope but a “li” end tag seen.
Stray end tag “div”.
Bad value “” for attribute “id” on element “div”: An ID must not be the empty string.
Duplicate ID “home-collapse4”.
Element “li” not allowed as child of element “a” in this context. (Suppressing further errors from this subtree.)
Poland PL