Websosanh.vn W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
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”.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
Bad value “audience” for attribute “http-equiv” on element “meta”.
Attribute “account-action” not allowed on element “div” at this point.
Element “img” is missing required attribute “src”.
Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
Start tag “button” seen but an element of the same type was already open.
End tag “form” seen, but there were open elements.
Unclosed element “button”.
Cannot recover after last error. Any further errors will be ignored.
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