Mexicanosprimero.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Bad value “true” for attribute “allowfullscreen” on element “iframe”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
End tag “p” implied, but there were open elements.
Unclosed element “code”.
Element “div” not allowed as child of element “code” in this context. (Suppressing further errors from this subtree.)
Element “ul” not allowed as child of element “code” in this context. (Suppressing further errors from this subtree.)
End tag “div” seen, but there were open elements.
No “code” element in scope but a “code” end tag seen.
No “p” element in scope but a “p” end tag seen.
Attribute “pubdate” not allowed on element “time” at this point.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
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