Welovebudapest.com 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 document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The value of attribute “srcset” on element “source” from namespace “http://www.w3.org/1999/xhtml” is not in Unicode Normalization Form C.
Errors:
Bad value “” for attribute “href” on element “link”: Must be non-empty.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Bad value “data:image/svg+xml;charset=utf-8,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' viewBox%3D'0 0 4 2'%2F%3E” for attribute “src” on element “img”: Illegal character in scheme data: space is not allowed.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “data:image/svg+xml;charset=utf-8,%3Csvg xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg' viewBox%3D'0 0 4 3'%2F%3E” for attribute “src” on element “img”: Illegal character in scheme data: space is not allowed.
Element “picture” is missing a required instance of child element “img”.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
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