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”.
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
Bad value “” for attribute “name” on element “input”: Must not be empty.
Bad value “” for attribute “size” on element “input”: The empty string is not a valid positive integer.
Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “header” in this context. (Suppressing further errors from this subtree.)
Attribute “nopin” not allowed on element “img” at this point.
Element “img” is missing required attribute “src”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Stray doctype.
Bad value for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Attribute “pubdate” not allowed on element “time” at this point.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “navigation” role is unnecessary for element “nav”.
Empty heading.
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