Takelessons.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “Cache-Control” for attribute “http-equiv” on element “meta”.
Bad value “Pragma” for attribute “http-equiv” on element “meta”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Element “picture” is missing a required instance of child element “img”.
Stray end tag “div”.
The element “header” must not appear as a descendant of the “footer” element.
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “contentinfo” role is unnecessary for element “footer”.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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