Ozna.ru W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value “Cache-Control” for attribute “http-equiv” on element “meta”.
A document must not include more than one “meta” element with a “http-equiv” attribute whose value is “content-type”.
Duplicate attribute “class”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
No “li” element in scope but a “li” end tag seen.
Stray end tag “ul”.
CSS: “background-image”: Parse Error.
End tag “div” seen, but there were open elements.
Unclosed element “header”.
Stray end tag “header”.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
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