Goodspress.jp W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Attribute “value” not allowed on element “input” at this point.
Element “input” is missing required attribute “alt”.
Attribute “height:250px;” not allowed on element “div” at this point.
Attribute “width:300px;” not allowed on element “div” at this point.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
The “banner” role is unnecessary for element “header”.
The “main” role is unnecessary for element “main”.
The “navigation” role is unnecessary for element “nav”.
Attribute “height:250px;” is not serializable as XML 1.0.
Attribute “width:300px;” is not serializable as XML 1.0.
The “contentinfo” role is unnecessary for element “footer”.
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