Worldarchitecturefestival.com 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”.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “p” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “496px” for attribute “height” on element “iframe”: Expected a digit but saw “p” instead.
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
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