Bmw.ch W3C HTML Markup Validation
HTML markup errors and warnings
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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”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray end tag “a”.
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
Bad value “(only screen)” for attribute “media” on element “source”: Expected a CSS media feature but saw “only” instead.
Element “source” is missing required attribute “srcset”.
Element “img” is missing required attribute “src”.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “main” role is unnecessary for element “main”.
Empty heading.
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