Towardsdatascience.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
X-UA-Compatible HTTP header must have the value “IE=edge”, was “IE=edge, Chrome=1”.
Attribute “xmlns:cc” not allowed here.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “li” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “true” for attribute “required” on element “input”.
Element “div” not allowed as child of element “h3” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Warnings:
Content-Security-Policy HTTP header: Bad content security policy: Source list contains duplicate source expression "https://*.medium.com". All but the first instance will be ignored.
Attribute with the local name “xmlns:cc” is not serializable as XML 1.0.
The “charset” attribute on the “script” element is obsolete.
The “type” attribute is unnecessary for JavaScript resources.
Consider adding a “lang” attribute to the “html” start tag to declare the language of this document.
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