Mdsz.hu W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
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 “https://www.facebook.com/tr?ev=6048980306092&cd[value]=0.00&cd[currency]=HUF&noscript=1” for attribute “src” on element “img”: Illegal character in query: “[” is not allowed.
Duplicate attribute “height”.
Duplicate attribute “width”.
Attribute “rel” not allowed on element “img” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Warnings:
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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