Messefrankfurt.ru W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Element “p” not allowed as child of element “label” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “label” 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.
Attribute “disabled” not allowed on element “a” at this point.
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
Duplicate attribute “rel”.
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Stray doctype.
Bad value “063fwkx” for attribute “id” on element “linearGradient”: Not a valid XML 1.0 name.
Bad value “5dsajvd” for attribute “id” on element “radialGradient”: Not a valid XML 1.0 name.
Attribute “type” not allowed on element “div” at this point.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “button” role is unnecessary for element “button”.
Empty heading.
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