Chronus.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Stray end tag “span”.
Attribute “mozallowfullscreen” not allowed on element “iframe” at this point.
Attribute “webkitallowfullscreen” not allowed on element “iframe” at this point.
Attribute “oallowfullscreen” not allowed on element “iframe” at this point.
Attribute “msallowfullscreen” not allowed on element “iframe” at this point.
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
Bad value “100%” for attribute “height” on element “iframe”: Expected a digit but saw “%” instead.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Warnings:
Empty heading.
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