Errors:
A “charset” attribute on a “meta” element found after the first 1024 bytes.
Attribute “property” not allowed on element “meta” at this point.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
Duplicate ID “app-bar”.
Attribute “[class]” not allowed on element “nav” at this point.
The “center” element is obsolete. Use CSS instead.
End tag “center” seen, but there were open elements.
Unclosed element “span”.
Bad value “100%” for attribute “width” on element “img”: Expected a digit but saw “%” instead.
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 “p” in this context. (Suppressing further errors from this subtree.)
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “app-bar” was here.
Attribute “[class]” is not serializable as XML 1.0.
The “type” attribute for the “style” element is not needed and should be omitted.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
The “charset” attribute on the “script” element is obsolete.
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