Devexperts.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Saw “"” when expecting an attribute name. Probable cause: “=” missing immediately before.
Attribute “"” not allowed on element “a” at this point.
Element “ul” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “img” is missing required attribute “src”.
Bad value “” for attribute “src” on element “img”: Must be non-empty.
The “sizes” attribute may be specified only if the “srcset” attribute is also present.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
Attribute “"” is not serializable as XML 1.0.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “type” attribute is unnecessary for JavaScript resources.
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