Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Attribute “href” not allowed on element “button” at this point.
The element “button” must not appear as a descendant of the “a” element.
The “font” element is obsolete.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.
End tag “br”.
Element “center” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
The “center” element is obsolete. Use CSS instead.
Stray end tag “span”.
End tag “h3” seen, but there were open elements.
Unclosed element “b”.
Unclosed element “center”.
Unclosed element “span”.
End tag “div” seen, but there were open elements.
End tag “h2” seen, but there were open elements.
Element “blockquote” not allowed as child of element “b” in this context. (Suppressing further errors from this subtree.)
End tag “h6” seen, but there were open elements.
End tag “p” seen, but there were open elements.
End tag “li” seen, but there were open elements.
Element “article” not allowed as child of element “a” in this context. (Suppressing further errors from this subtree.)
End tag “h4” seen, but there were open elements.
Element “h6” not allowed as child of element “b” in this context. (Suppressing further errors from this subtree.)
Element “p” not allowed as child of element “b” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “b” in this context. (Suppressing further errors from this subtree.)
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
End tag “blockquote” seen, but there were open elements.
End tag “article” seen, but there were open elements.
Element “div” not allowed as child of element “noscript” in this context. (Suppressing further errors from this subtree.)
End tag for “body” seen, but there were unclosed elements.
Warnings:
The “banner” role is unnecessary for element “header”.
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
The “navigation” role is unnecessary for element “nav”.
Empty heading.
This document appears to be written in Thai but the “html” start tag has “lang="en-US"”. Consider using “lang="th"” (or variant) instead.
Thailand TH
