La.lv 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”.
Bad value “https://fonts.googleapis.com/css?family=IBM+Plex+Serif:400,500,600|Roboto:400,500,700&subset=latin-ext” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
CSS: Parse Error.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
Bad value “” for attribute “src” on element “img”: Must be non-empty.
Duplicate ID “promo-example-v1”.
Bad value “text/ javascript” for attribute “type” on element “script”: Expected a token character but saw “ ” 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.
Empty heading.
The “main” role is unnecessary for element “main”.
The first occurrence of ID “promo-example-v1” was here.
The “type” attribute is unnecessary for JavaScript resources.
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