Crimsoneducation.org W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The first occurrence of ID “Symbols” was here.
The first occurrence of ID “Footer” was here.
The first occurrence of ID “Sitemap” was here.
Errors:
A “charset” attribute on a “meta” element found after the first 1024 bytes.
Bad value “screen, projection” for attribute “media” on element “link”: Deprecated media type “projection”. For guidance, see the Media Types section in the current Media Queries specification.
The “charset” attribute on the “link” element is obsolete. Use an HTTP Content-Type header on the linked resource instead.
Attribute “to” not allowed on element “button” at this point.
Attribute “target” not allowed on element “button” at this point.
Attribute “to” not allowed on element “a” at this point.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Element “p” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Duplicate ID “Symbols”.
Duplicate ID “Footer”.
Duplicate ID “Sitemap”.
Element “script” must not have attribute “charset” unless attribute “src” is also specified.
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