Roompot.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.
Empty heading.
Attribute “inkscape:connector-curvature” is not serializable as XML 1.0.
The first occurrence of ID “a” was here.
This document appears to be written in German. Consider adding “lang="de"” (or variant) to the “html” start tag.
Errors:
Bad start tag in “iframe” in “head”.
Stray end tag “noscript”.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “tel:040-55 55 78 78” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
A “select” element with a “required” attribute, and without a “multiple” attribute, and without a “size” attribute whose value is greater than “1”, must have a child “option” element.
Attribute “inkscape:connector-curvature” not allowed on element “path” at this point.
Duplicate ID “a”.
Bad value “” for attribute “id” on element “div”: An ID must not be the empty string.
No “p” element in scope but a “p” end tag seen.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Germany DE