Winkbeds.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Empty heading.
The first occurrence of ID “Layer_1” was here.
The first occurrence of ID “hpmattressdetail” was here.
The first occurrence of ID “logo-mark” was here.
The first occurrence of ID “logo-type” was here.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Start tag “body” seen but an element of the same type was already open.
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Stray doctype.
Duplicate ID “Layer_1”.
Element “p” not allowed as child of element “h2” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “hpmattressdetail”.
Duplicate ID “logo-mark”.
Duplicate ID “logo-type”.
United States US