Mx.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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).
Attribute “padding:56.25%” is not serializable as XML 1.0.
Attribute “0” is not serializable as XML 1.0.
Attribute “0;position:relative;"” is not serializable as XML 1.0.
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
Errors:
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
No space between attributes.
Duplicate attribute “0”.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “padding:56.25%” not allowed on element “div” at this point.
Attribute “0” not allowed on element “div” at this point.
Attribute “0;position:relative;"” not allowed on element “div” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute value missing.
Attribute “alt” not allowed on element “video” at this point.
End tag “br”.
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