Miho.or.jp W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “Last-Modified” for attribute “http-equiv” on element “meta”.
CSS: Parse Error.
Duplicate ID “splash”.
Element “style” not allowed as child of element “main” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “poster” on element “video”: Must be non-empty.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “type” attribute for the “style” element is not needed and should be omitted.
The first occurrence of ID “splash” was here.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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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