Sketchapp.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Stray start tag “html”.
Attribute “itemprop” not allowed on element “svg” at this point.
Attribute “alt” not allowed on element “svg” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
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.
Attribute “content” not allowed on element “span” at this point.
Stray end tag “div”.
Bad value “navigation” for attribute “role” on element “ul”.
The element “footer” must not appear as a descendant of the “footer” element.
Warnings:
The “navigation” role is unnecessary for element “nav”.
The “contentinfo” role is unnecessary for element “footer”.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
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