Imsider.ru W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Element “nobr” not allowed as child of element “h4” in this context. (Suppressing further errors from this subtree.)
A slash was not immediately followed by “>”.
Bad value “” for attribute “height” on element “img”: The empty string is not a valid non-negative integer.
Attribute “?” not allowed on element “img” at this point.
Element “noindex” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
The element “a” must not appear as a descendant of the “a” element.
Bad value “120px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.
The “font” element is obsolete. Use CSS instead.
Stray end tag “wbr”.
No “p” element in scope but a “p” end tag seen.
The “for” attribute of the “label” element must refer to a non-hidden form control.
Warnings:
The “navigation” role is unnecessary for element “nav”.
Empty heading.
Attribute “?” is not serializable as XML 1.0.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
This document appears to be written in Russian. Consider adding “lang="ru"” (or variant) to the “html” start tag.
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