Marker.io W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “xmlns:fb” not allowed here.
Bad value “utf8” for attribute “charset” on element “meta”: “utf8” is not a preferred encoding name. The preferred label for this encoding is “utf-8”.
Element “div” not allowed as child of element “h1” in this context. (Suppressing further errors from this subtree.)
End tag “h1” seen, but there were open elements.
Unclosed element “div”.
Attribute “href” not allowed on element “button” at this point.
Element “div” not allowed as child of element “a” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “100%” for attribute “width” on element “video”: Expected a digit but saw “%” instead.
Bad value “auto” for attribute “height” on element “video”: Expected a digit but saw “a” instead.
Bad value “32px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.
Warnings:
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
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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