Getrevising.co.uk W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Errors:
Element “meta” is missing one or more of the following attributes: “content”, “property”.
Bad value “true” for attribute “async” on element “script”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “ul” not allowed as child of element “menu” in this context. (Suppressing further errors from this subtree.)
The element “footer” must not appear as a descendant of the “footer” element.
The “for” attribute of the “label” element must refer to a non-hidden form control.
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