Errors:
Quote “'” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “defer'” not allowed on element “script” at this point.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Attribute “aria-selected” not allowed on element “style” at this point.
Bad value “” for attribute “src” on element “iframe”: Must be non-empty.
Attribute “border” not allowed on element “iframe” at this point.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “id” on element “div”: An ID must not be the empty string.
Duplicate ID “”.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “center” element is obsolete. Use CSS instead.
No “p” element in scope but a “p” end tag seen.
Element “script” must not have attribute “async” unless attribute “src” is also specified.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Warnings:
Attribute “defer'” is not serializable as XML 1.0.
The first occurrence of ID “” was here.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The “main” role is unnecessary for element “main”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “contentinfo” role is unnecessary for element “footer”.
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