Berekenhet.nl 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.
A document must not include more than one “meta” element with a “http-equiv” attribute whose value is “content-type”.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
Bad value “Content-Style-Type” for attribute “http-equiv” on element “meta”.
Bad value “button” for attribute “type” on element “a”: Subtype missing.
Bad value “mailto:?subject=BerekenHet.nl:%20Zelf alles berekenen op BerekenHet.nl&body=https://www.berekenhet.nl/” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
No “p” element in scope but a “p” end tag seen.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Warnings:
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
This document appears to be written in Dutch but the “html” start tag has “lang="en"”. Consider using “lang="nl"” (or variant) instead.
Netherlands NL