Firepad.io W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “http://www.w3.org/1999/html” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “100px” for attribute “width” on element “iframe”: Expected a digit but saw “p” instead.
Bad value “20px” for attribute “height” on element “iframe”: Expected a digit but saw “p” 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The “allowtransparency” attribute on the “iframe” element is obsolete.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The “frameborder” attribute on the “iframe” element is obsolete.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The “scrolling” attribute on the “iframe” element is obsolete.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.
Bad value “102px” for attribute “width” on element “iframe”: Expected a digit but saw “p” instead.
Element “ul” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Bad value “mailto:firepad@firebase.com?subject=[Firepad Question]” for attribute “href” on element “a”: Illegal character in query: “[” is not allowed.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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