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 “toolbar” for attribute “role” on element “nav”.
Bad value “navigation” for attribute “role” on element “ul”.
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “srcset” on element “source”: Must contain one or more image candidate strings.
A “source” element that has a following sibling “source” element or “img” element with a “srcset” attribute must have a “media” attribute and/or “type” attribute.
Element “style” not allowed as child of element “main” in this context. (Suppressing further errors from this subtree.)
Element “center” not allowed as child of element “h3” in this context. (Suppressing further errors from this subtree.)
The “center” element is obsolete. Use CSS instead.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
Empty heading.
The “main” role is unnecessary for element “main”.
The “contentinfo” role is unnecessary for element “footer”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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