Gohenry.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “amp” not allowed on element “html” at this point.
Attribute “custom-element” not allowed on element “script” at this point.
Attribute “amp-custom” not allowed on element “style” at this point.
CSS: “phablet” is not a “width” value
CSS: “phone” is not a “width” value
CSS: “desktop” is not a “width” value
CSS: “tablet” is not a “width” value
Attribute “amp-boilerplate” not allowed on element “style” at this point.
Attribute “on” not allowed on element “button” at this point.
Attribute “on” not allowed on element “div” at this point.
The element “button” must not appear as a descendant of an element with the attribute “role=button”.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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