Coreproducts.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Obsolete doctype. Expected “<!DOCTYPE html>”.
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “h4” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Bad value “null” for attribute “rel” on element “a”: The string “null” is not a registered keyword.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).
The element “button” must not appear as a descendant of the “a” element.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
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