Immowelt.ch W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
This document appears to be written in German. Consider adding “lang="de"” (or variant) to the “html” start tag.
Errors:
Attribute “alt” not allowed on element “source” at this point.
Element “a” not allowed as child of element “ul” 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.
Element “p” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “(max-width: 640px) and (-webkit-max-device-pixel-ratio: 1.5), (max-width: 640px) and (-o-max-device-pixel-ratio: 15/10), (max-width: 640px) and (max-resolution: 150dpi)” for attribute “media” on element “source”: Expected a CSS media feature but saw “-webkit-max-device-pixel-ratio” instead.
Element “img” is missing required attribute “src”.
Text not allowed in element “ul” in this context.
Element “br” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “(-webkit-max-device-pixel-ratio: 1.5),(-o-max-device-pixel-ratio: 15/10),(max-resolution: 150dpi)” for attribute “media” on element “source”: Expected a CSS media feature but saw “-webkit-max-device-pixel-ratio” instead.
Bad value “” for attribute “src” on element “iframe”: Must be non-empty.
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