Henw.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Text not allowed in element “iframe” in this context.
Attribute “clas” not allowed on element “div” at this point.
Attribute “autocorrect” not allowed on element “input” at this point.
The element “button” must not appear as a descendant of the “a” element.
Attribute “alt” not allowed on element “a” at this point.
The value of the “for” attribute of the “label” element must be the ID of a non-hidden form control.
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 “article” role is unnecessary for element “article”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “contentinfo” role is unnecessary for element “footer”.
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