Tipsport.cz W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “og:http://ogp.me/ns#” for attribute “prefix” on element “html”.
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 “previewimage” for attribute “rel” on element “link”: The string “previewimage” is not a registered keyword.
Bad start tag in “iframe” in “head”.
Stray end tag “noscript”.
A “link” element must not appear as a descendant of a “body” element unless the “link” element has an “itemprop” attribute or has a “rel” attribute whose value contains “dns-prefetch”, “modulepreload”, “pingback”, “preconnect”, “prefetch”, “preload”, “prerender”, or “stylesheet”.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
No space between attributes.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “null"” not allowed on element “div” at this point.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
Attribute “null"” is not serializable as XML 1.0.
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