Note.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Text run is not in Unicode Normalization Form C.
Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
CSS: “font-feature-settings”: “normal” is not a “font-feature-settings” value.
CSS: “display”: Parse Error.
Attribute “disabled” not allowed on element “i” at this point.
Element “div” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)
The element “button” must not appear as a descendant of the “a” element.
Element “div” not allowed as child of element “i” in this context. (Suppressing further errors from this subtree.)
Bad value “basic” for attribute “type” on element “a”: Subtype missing.
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