Katerinaperez.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Duplicate ID “Слой_2”.
Duplicate ID “Слой_1-2”.
Duplicate ID “Режим_изоляции”.
Element “p” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “Слой_1”.
Duplicate ID “new_sender_client”.
Duplicate ID “sender_client_email”.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The first occurrence of ID “Слой_2” was here.
The first occurrence of ID “Слой_1-2” was here.
The first occurrence of ID “Режим_изоляции” was here.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The first occurrence of ID “Слой_1” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “new_sender_client” was here.
The first occurrence of ID “sender_client_email” was here.
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