Birdwell.com 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”.
Element “meta” is missing one or more of the following attributes: “charset”, “content”, “http-equiv”, “itemprop”, “name”, “property”.
Element “script” must not have attribute “defer” unless attribute “src” is also specified.
Bad value “” for attribute “id” on element “body”: An ID must not be the empty string.
Attribute “href” not allowed on element “use” at this point.
Element “div” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)
Duplicate attribute “class”.
Duplicate ID “k_id_email”.
Warnings:
The “banner” role is unnecessary for element “header”.
The “main” role is unnecessary for element “main”.
The “contentinfo” role is unnecessary for element “footer”.
The first occurrence of ID “k_id_email” was here.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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