Hse24.de 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 “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Attribute “$” is not serializable as XML 1.0.
Errors:
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Bad value “//:0” for attribute “src” on element “img”: Invalid host: empty host.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “autocorrect” not allowed on element “input” at this point.
Attribute “$” not allowed on element “div” at this point.
Attribute “data” not allowed on element “a” at this point.
Element “img” is missing required attribute “src”.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Bad value “tel” for attribute “type” on element “a”: Subtype missing.
The “itemprop” attribute was specified, but the element is not a property of any item.
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