Tinkerlab.com 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.
No “p” element in scope but a “p” end tag seen.
Element “script” must not have attribute “async” unless attribute “src” is also specified.
Bad value “https://www.facebook.com/tr?id=1679151425716420&ev=PageView&noscript=1&cd[domain]=tinkerlab.com” for attribute “src” on element “img”: Illegal character in query: “[” is not allowed.
Bad value “https://www.facebook.com/tr?id=1679151425716420&ev=GeneralEvent&noscript=1&cd[post_type]=page&cd[content_name]=TinkerLab&cd[domain]=tinkerlab.com” for attribute “src” on element “img”: Illegal character in query: “[” is not allowed.
Warnings:
The “main” role is unnecessary for element “main”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “complementary” role is unnecessary for element “aside”.
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