Hugotalks.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “type” attribute for the “style” element is not needed and should be omitted.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
Potentially bad value “allow-scripts allow-same-origin allow-popups allow-presentation” for attribute “sandbox” on element “iframe”: Setting both “allow-scripts” and “allow-same-origin” is not recommended, because it effectively enables an embedded page to break out of all sandboxing.
The first occurrence of ID “a” was here.
The first occurrence of ID “b” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Errors:
The “main” element must not appear as a descendant of the “section” element.
Bad value “true” for attribute “allowfullscreen” on element “iframe”.
Duplicate ID “a”.
Duplicate ID “b”.
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