Xem.vn W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “www.w3.org/1999/xhtml” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
Duplicate attribute “property”.
Attribute “itemprop” not allowed on element “meta” at this point.
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Bad start tag in “img” in “head”.
Bad value “https://www.facebook.com/tr?id=1566872533336700&ev=PageView
&noscript=1” for attribute “src” on element “img”: Tab, new line or carriage return found.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray end tag “noscript”.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
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