C40.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “initial-scale” not allowed on element “meta” at this point.
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Duplicate ID “clip-path”.
Bad character “
” after “<”. Probable cause: Unescaped “<”. Try escaping it as “<”.
Text not allowed in element “symbol” in this context.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Named character reference was not terminated by a semicolon. (Or “&” should have been escaped as “&”.)
Warnings:
The first occurrence of ID “clip-path” was here.
Empty heading.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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).
United States US