Iohk.io 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 “auto” for attribute “height” on element “img”: Expected a digit but saw “a” instead.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “button” for attribute “type” on element “a”: Subtype missing.
Bad value “” for attribute “id” on element “div”: An ID must not be the empty string.
Duplicate ID “intro_quality-1”.
Duplicate ID “intro_quality-2”.
Duplicate ID “intro_quality-3”.
Duplicate ID “”.
Bad value “” for attribute “id” on element “a”: An ID must not be the empty string.
Bad value “” for attribute “id” on element “h4”: An ID must not be the empty string.
Bad value “” for attribute “src” on element “iframe”: Must be non-empty.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
The first occurrence of ID “intro_quality-1” was here.
The first occurrence of ID “intro_quality-2” was here.
The first occurrence of ID “intro_quality-3” was here.
The first occurrence of ID “” was here.
Empty heading.
United States US