Grouppolicy.biz W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Element “script” must not have attribute “async” unless attribute “src” is also specified.
Bad value “http://fonts.googleapis.com/css?family=Bitter:700|Gudea:400,700,400italic” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
Bad value “screen, projection” for attribute “media” on element “link”: Deprecated media type “projection”. For guidance, see the Media Types section in the current Media Queries specification.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Bad value “generator” for attribute “rel” on element “a”: The string “generator” is not a registered keyword.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Element “script” must not have attribute “defer” unless attribute “src” is also specified.
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The “contentinfo” role is unnecessary for element “footer”.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
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