Columbusnavigator.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “script” must not have attribute “async” unless attribute “src” is also specified.
Element “style” not allowed as child of element “header” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “fb-root”.
Duplicate ID “post-tags”.
No space between attributes.
Saw “"” when expecting an attribute name. Probable cause: “=” missing immediately before.
Attribute “"” not allowed on element “form” at this point.
Bad value “” for attribute “id” on element “div”: An ID must not be the empty string.
Warnings:
The “complementary” role is unnecessary for element “aside”.
The “banner” role is unnecessary for element “header”.
The first occurrence of ID “fb-root” was here.
The “main” role is unnecessary for element “main”.
The first occurrence of ID “post-tags” was here.
The “navigation” role is unnecessary for element “nav”.
Attribute “"” is not serializable as XML 1.0.
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