Errors:
Attribute “itemprop” not allowed on element “meta” at this point.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Bad value “nokia-touch-icon” for attribute “rel” on element “link”: The string “nokia-touch-icon” is not a registered keyword.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “true” for attribute “allowfullscreen” on element “iframe”.
Attribute “mozallowfullscreen” not allowed on element “iframe” at this point.
Attribute “webkitallowfullscreen” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Bad value “100%” for attribute “width” on element “img”: Expected a digit but saw “%” instead.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “aria-labelledby” attribute must point to an element in the same document.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Text run is not in Unicode Normalization Form C.
The “navigation” role is unnecessary for element “nav”.
This document appears to be written in Vietnamese. Consider adding “lang="vi"” (or variant) to the “html” start tag.
Viet Nam VN