Erih.net W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
The “type” attribute is unnecessary for JavaScript resources.
This document appears to be written in English but the “html” start tag has “lang="de"”. Consider using “lang="en"” (or variant) instead.
Errors:
Element “img” is missing required attribute “src”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate attribute “class”.
Bad value “12-10-2019” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “11-10-2019” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “06-10-2019” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “28-09-2019” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “23-09-2019” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
The “itemprop” attribute was specified, but the element is not a property of any item.
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