Hapaeikaiwa.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Attribute “xmlns:og” not allowed here.
Attribute “xmlns:fb” not allowed here.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Duplicate ID “ebook_section”.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).
Bad value “250px” for attribute “width” on element “img”: Expected a digit but saw “p” instead.
Bad value “250px;” for attribute “height” on element “img”: Expected a digit but saw “p” instead.
Warnings:
Attribute with the local name “xmlns:og” is not serializable as XML 1.0.
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “ebook_section” was here.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
This document appears to be written in Japanese. Consider adding “lang="ja"” (or variant) to the “html” start tag.
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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