Ec1lodz.pl W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “” for attribute “href” on element “link”: Must be non-empty.
Attribute “disabled” not allowed on element “link” at this point.
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “about” not allowed on element “div” at this point.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Start tag “a” seen but an element of the same type was already open.
End tag “a” violates nesting rules.
Stray end tag “span”.
Stray end tag “a”.
Duplicate ID “slide-0”.
Duplicate ID “slide-1”.
Duplicate ID “slide-2”.
Duplicate ID “slide-3”.
Warnings:
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
The first occurrence of ID “slide-0” was here.
The first occurrence of ID “slide-1” was here.
The first occurrence of ID “slide-2” was here.
The first occurrence of ID “slide-3” was here.
The “link” role is unnecessary for element “a”.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
Poland PL