Errors:
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
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 “charset” attribute on a “meta” element found after the first 1024 bytes.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “auth” not allowed on element “a” at this point.
Attribute “auth-type” not allowed on element “a” at this point.
Attribute “type” not allowed on element “textarea” at this point.
Attribute “value” not allowed on element “textarea” at this point.
No “p” element in scope but a “p” end tag seen.
Bad value “” for attribute “src” on element “iframe”: Must be non-empty.
Bad value “1” for attribute “allowfullscreen” on element “iframe”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Attribute “modal-toggle” not allowed on element “a” at this point.
Bad value “true” for attribute “async” on element “script”.
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.
Text run is not in Unicode Normalization Form C.
This document appears to be written in Japanese. Consider adding “lang="ja"” (or variant) to the “html” start tag.
Japan JP