Opel.de 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.
Element “meta” is missing one or more of the following attributes: “content”, “property”.
Element “meta” is missing required attribute “content”.
Element “meta” is missing one or more of the following attributes: “charset”, “content”, “http-equiv”, “itemprop”, “name”, “property”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “img” is missing required attribute “src”.
Attribute “href” not allowed on element “button” at this point.
Bad value “auto” for attribute “width” on element “img”: Expected a digit but saw “a” instead.
Warnings:
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Empty heading.
This document appears to be written in German. Consider adding “lang="de"” (or variant) to the “html” start tag.
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