Sv-group.ch W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Start tag “head” seen but an element of the same type was already open.
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”.
Element “img” is missing required attribute “src”.
A “source” element that has a following sibling “source” element or “img” element with a “srcset” attribute must have a “media” attribute and/or “type” attribute.
Element “noscript” not allowed as child of element “picture” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “id” on element “div”: An ID must not be the empty string.
Duplicate ID “breadcrumb-0”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “itemref” attribute referenced “breadcrumb-76”, but there is no element with an “id” attribute with that value.
Warnings:
The “navigation” role is unnecessary for element “nav”.
The “button” role is unnecessary for element “button”.
The “main” role is unnecessary for element “main”.
The first occurrence of ID “breadcrumb-0” was here.
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