Casper.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “http-equiv” not allowed on element “meta” at this point.
Attribute “content” not allowed on element “meta” at this point.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Element “section” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Attribute “selected” not allowed on element “li” at this point.
Bad value “(min-width: 1024)” for attribute “media” on element “source”: Non-zero lengths require a unit.
Attribute “inputmode” not allowed on element “input” at this point.
Stray start tag “script”.
Warnings:
The “main” role is unnecessary for element “main”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “inputmode” attribute is not supported in all browsers. Please be sure to test, and consider using a polyfill.
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).
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