Zmp.co.jp W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “true” for attribute “async” on element “script”.
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 “async” not allowed on element “link” at this point.
A “link” element must not appear as a descendant of a “body” element unless the “link” element has an “itemprop” attribute or has a “rel” attribute whose value contains “dns-prefetch”, “pingback”, “preconnect”, “prefetch”, “preload”, “prerender”, or “stylesheet”.
Attribute “ab_test_id” not allowed on element “div” at this point.
Attribute “campaign_id” not allowed on element “div” at this point.
Attribute “is_ab_test” not allowed on element “div” at this point.
Attribute “obj_id” not allowed on element “div” at this point.
Attribute “obj_type” not allowed on element “div” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “font” element is obsolete. Use CSS instead.
Warnings:
The “banner” role is unnecessary for element “header”.
Empty heading.
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