Checkers.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.
An element with “role=menuitem” must be contained in, or owned by, an element with “role=menubar” or “role=menu”.
Bad value “” for attribute “id” on element “h1”: An ID must not be the empty string.
Element “li” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “https://5776902.fls.doubleclick.net/activityi;src=5776902;type=fe;cat=cr_hp;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=[SessionID]?” for attribute “src” on element “iframe”: Illegal character in path segment: “[” is not allowed.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Element “span” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “phone” for attribute “type” on element “input”.
Attribute “placeholder” is only allowed when the input type is “email”, “number”, “password”, “search”, “tel”, “text”, or “url”.
Bad value “https://5776902.fls.doubleclick.net/activityi;src=5776902;type=fe;cat=cr_un0;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=[SessionID]?” for attribute “src” on element “iframe”: Illegal character in path segment: “[” is not allowed.
Warnings:
The “main” role is unnecessary for element “main”.
The “button” role is unnecessary for element “button”.
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