Nuts.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value ““dns-prefetch”” for attribute “rel” on element “link”: The string ““dns-prefetch”” is not a registered keyword.
Bad value “” for attribute “aria-activedescendant” on element “input”: An ID must not be the empty string.
Duplicate ID “combobox-guide”.
Element “form” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The value of the “for” attribute of the “label” element must be the ID of a non-hidden form control.
The “aria-controls” attribute must point to an element in the same document.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
Consider avoiding viewport values that prevent users from resizing documents.
Attribute “aria-activedescendant” value should either refer to a descendant element, or should be accompanied by attribute “aria-owns”.
The first occurrence of ID “combobox-guide” was here.
Empty heading.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
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