Hormann.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The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Errors:
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Bad value “100%” for attribute “width” on element “img”: Expected a digit but saw “%” instead.
Bad value “tabpanel” for attribute “role” on element “ul”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
No “p” element in scope but a “p” end tag seen.
The “aria-controls” attribute must point to an element in the same document.
An element with “role=tab” must be contained in, or owned by, an element with “role=tablist”.
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