Bonify.io W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “"en"” for attribute “lang” on element “html”: The language subtag “"en"” is not a valid language subtag.
Bad value “"ltr"” for attribute “dir” 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 “ImageToolbar” for attribute “http-equiv” on element “meta”.
Bad value “revision” for attribute “rel” on element “link”: The string “revision” is not a registered keyword.
Warnings:
The “banner” role is unnecessary for element “header”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
The “article” role is unnecessary for element “article”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “button” role is unnecessary for element “button”.
This document appears to be written in English but the “html” start tag has “lang=""en""”. Consider using “lang="en"” (or variant) instead.
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