Kolba.pl 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”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Unsupported SVG version specified. This validator only supports SVG 1.1. The recommended way to suppress this warning is to remove the “version” attribute altogether.
The first occurrence of ID “w1” was here.
Errors:
Bad value “https://fonts.googleapis.com/css?family=Open+Sans:400,600,700|Oswald:400,500,700|Montserrat:700&subset=latin-ext” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Bad value “tel:32 265 22 00” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
Element “div” 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.
Duplicate ID “w1”.
The “aria-controls” attribute must point to an element in the same document.
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