Stamps.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “navigation” role is unnecessary for element “nav”.
The “button” role is unnecessary for element “button”.
The first occurrence of ID “offer-box” was here.
The first occurrence of ID “offer-box__overlay--img” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “usps-logo-words” was here.
Empty heading.
The “type” attribute is unnecessary for JavaScript resources.
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).
Errors:
Element “div” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “offer-box”.
Duplicate ID “offer-box__overlay--img”.
Duplicate ID “usps-logo-words”.
The “aria-labelledby” attribute must point to an element in the same document.
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