Vorleser.net 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 “form” role is unnecessary for element “form”.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
Attribute “prinz"” is not serializable as XML 1.0.
Attribute “e-book"” is not serializable as XML 1.0.
This document appears to be written in German. Consider adding “lang="de"” (or variant) to the “html” start tag.
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”.
The element “header” must not appear as a descendant of the “header” element.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
No space between attributes.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “der” not allowed on element “a” at this point.
Attribute “kleine” not allowed on element “a” at this point.
Attribute “prinz"” not allowed on element “a” at this point.
Attribute “als” not allowed on element “a” at this point.
Attribute “e-book"” not allowed on element “a” at this point.
Germany DE