Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “list” role is unnecessary for element “ul”.
The “link” role is unnecessary for element “a”.
The “button” role is unnecessary for element “button”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “type” attribute is unnecessary for JavaScript resources.
Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Attribute “alt” not allowed on element “a” at this point.
Bad value “input” for attribute “type” on element “input”.
Attribute “placeholder” is only allowed when the input type is “email”, “number”, “password”, “search”, “tel”, “text”, or “url”.
No space between attributes.
The element “footer” must not appear as a descendant of the “header” element.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
Bad value “” for attribute “id” on element “script”: An ID must not be the empty string.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
An element with “role=menuitem” must be contained in, or owned by, an element with “role=menubar” or “role=menu”.
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