Emailregex.com W3C HTML Markup Validation
HTML markup errors and warnings
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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 “a” seen but an element of the same type was already open.
End tag “a” violates nesting rules.
Stray end tag “span”.
Stray end tag “a”.
Attribute “alt” not allowed on element “a” at this point.
No “p” element in scope but a “p” end tag seen.
Duplicate ID “main”.
End tag “article” seen, but there were open elements.
Unclosed element “div”.
Bad value “designer” for attribute “rel” on element “a”: The string “designer” is not a registered keyword.
Bad value “generator” for attribute “rel” on element “a”: The string “generator” is not a registered keyword.
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
The first occurrence of ID “main” was here.
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
The “contentinfo” role is unnecessary for element “footer”.
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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