Kafkas.gr W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Errors:
Element “script” must not have attribute “async” unless attribute “src” is also specified.
Element “option” without attribute “label” must not be empty.
Duplicate attribute “value”.
Element “input” with attribute “type” whose value is “button” must have non-empty attribute “value”.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad character “3” after “<”. Probable cause: Unescaped “<”. Try escaping it as “<”.
End tag “header” seen, but there were open elements.
Unclosed element “div”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
Element “script” must not have attribute “defer” unless attribute “src” is also specified.
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