Errors:
A “charset” attribute on a “meta” element found after the first 1024 bytes.
Bad value “cleartype” for attribute “http-equiv” on element “meta”.
Bad value “nav” for attribute “role” on element “nav”.
Attribute “about” not allowed on element “article” at this point.
Element “img” is missing required attribute “src”.
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Duplicate attribute “class”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Text not allowed in element “iframe” in this context.
Attribute “rel” not allowed on element “div” at this point.
Attribute “datatype” not allowed on element “span” at this point.
Attribute “content” not allowed on element “span” at this point.
Attribute “about” not allowed on element “div” at this point.
The element “header” must not appear as a descendant of the “footer” element.
Attribute “placeholder” not allowed on element “select” at this point.
The first child “option” element of a “select” element with a “required” attribute, and without a “multiple” attribute, and without a “size” attribute whose value is greater than “1”, must have either an empty “value” attribute, or must have no text content. Consider either adding a placeholder option label, or adding a “size” attribute with a value equal to the number of “option” elements.
The “for” attribute of the “label” element must refer to a non-hidden form control.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
The “navigation” role is unnecessary for element “nav”.
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).
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “article” role is unnecessary for element “article”.
The “contentinfo” role is unnecessary for element “footer”.
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