Oluce.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
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 “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Bad value “100%” for attribute “width” on element “img”: Expected a digit but saw “%” instead.
Bad value “100%” for attribute “height” on element “img”: Expected a digit but saw “%” instead.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
Duplicate ID “security”.
A document must not include more than one “autofocus” attribute.
Warnings:
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.
The first occurrence of ID “security” was here.
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