Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “type” attribute is unnecessary for JavaScript resources.
The first occurrence of ID “AllowedByDefault” was here.
The first occurrence of ID “Ebene_1” was here.
A table row was 2 columns wide and exceeded the column count established by the first row (1).
The “navigation” role is unnecessary for element “nav”.
The “link” role is unnecessary for element “a”.
Empty heading.
The “language” attribute on the “script” element is obsolete.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The “border” attribute is obsolete.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.
Errors:
“=” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
Duplicate ID “AllowedByDefault”.
Duplicate attribute “class”.
Duplicate ID “Ebene_1”.
No “p” element in scope but a “p” end tag seen.
Element “h3” not allowed as child of element “label” in this context. (Suppressing further errors from this subtree.)
Attribute “aria-selected” not allowed on element “a” at this point.
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
The element “button” must not appear as a descendant of the “a” element.
Stray end tag “source”.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The value of the “for” attribute of the “label” element must be the ID of a non-hidden form control.
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